Table of Contents

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 10-K
Form 10-K
þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
FOR THE FISCAL YEAR ENDED DECEMBER 31, 2010
FOR THE FISCAL YEAR ENDED DECEMBER 31, 2011
o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Commission file number 1-2198
The Detroit Edison Company, a Michigan corporation, meets the conditions set forth in General Instruction I (1) (a) and (b) of Form 10-K and is, therefore, filing this form with the reduced disclosure format.
THE DETROIT EDISON COMPANY
(Exact name of registrant as specified in its charter)
Michigan 38-0478650
(State or other jurisdiction of incorporation or organization) (I.R.S. Employer
organization)Identification No.)
   
One Energy Plaza, Detroit, Michigan 48226-1279
(Address of principal executive offices) (Zip Code)
313-235-4000
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
None
Securities registered pursuant to Section 12(g) of the Act:
None
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yeso Noþ
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yeso Noþ
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yesþ Noo
Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yesoþ Noo
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.þ
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
     Large accelerated filer o
 
Accelerated filer o
 
     Large accelerated filer
o
Accelerated fileroNon-accelerated filerþSmaller reporting companyo
(Do not check if a smaller reporting company)
 
Smaller reporting company o
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yeso Noþ
All of the registrant’s 138,632,324 outstanding shares of common stock, par value $10 per share, are owned by DTE Energy Company.
DOCUMENTS INCORPORATED BY REFERENCE
None



Table of Contents

The Detroit Edison Company
Annual Report on Form 10-K
Year Ended December 31, 20102011
Table of Contents
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64 EX-12.42
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101.INS XBRL Instance Document 
72101.SCH XBRL Taxonomy Extension Schema 
EX-4.273
EX-12.39
EX-23.24
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EX-32.61
EX-32.62


Definitions
101.CAL XBRL Taxonomy Extension Calculation Linkbase 
101.DEF XBRL Taxonomy Extension Definition Database
101.LAB XBRL Taxonomy Extension Label Linkbase
101.PRE XBRL Taxonomy Extension Presentation Linkbase



Definitions

ASC Accounting Standards Codification
   
ASU Accounting Standards Update
   
CIM A Choice Incentive Mechanism authorized by the MPSC that allows Detroit Edison to recover or refund non-fuel revenues lost or gained as a result of fluctuations in electric Customer Choice sales.
CTACosts to achieve, consisting of project management, consultant support and employee severance, related to the Performance Excellence Process.
   
Customer Choice Michigan legislation giving customers the option to choose alternative suppliers for electricity.
   
Detroit Edison The Detroit Edison Company ( a direct wholly owned subsidiary of DTE Energy) and subsidiary companies
   
DTE Energy DTE Energy Company, directly or indirectly the parent of Detroit Edison, Michigan Consolidated Gas Company and numerous non-utility subsidiaries
   
EPA United States Environmental Protection Agency
   
FASB Financial Accounting Standards Board
   
FERC Federal Energy Regulatory Commission
   
FTRs Financial transmission rights are financial instruments that entitle the holder to receive payments related to costs incurred for congestion on the transmission grid.
   
HCERAMCIT Health Care and Education Reconciliation ActMichigan Corporate Income Tax
MDEQMichigan Department of 2010Environmental Quality
   
MISO Midwest Independent System Operator is an Independent System Operator and the Regional Transmission Organization serving the Midwest United States and Manitoba, Canada.
   
MDNREMichigan Department of Natural Resources and Environment
MPSC Michigan Public Service Commission
   
NRC United States Nuclear Regulatory Commission
PPACAPatient Protection and Affordable Care Act of 2010
   
PSCR A Power Supply Cost Recovery mechanism authorized by the MPSC that allows Detroit Edison to recover through rates its fuel, fuel-related and purchased power costs.
   
RDM A Revenue Decoupling Mechanism authorized by the MPSC that is designed to minimize the impact on revenues of changes in average customer usage of electricity
   
Securitization Detroit Edison financed specific stranded costs at lower interest rates through the sale of rate reduction bonds by a wholly-owned special purpose entity, The Detroit Edison Securitization Funding LLC.

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VIE Variable Interest Entity

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Units of Measurement
  
   
kWh Kilowatthour of electricity
   
MW Megawatt of electricity
   
MWh Megawatthour of electricity



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Forward-Looking StatementsFORWARD-LOOKING STATEMENTS
Certain information presented herein includes “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to the financial condition, results of operations and business of Detroit Edison. Words such as "anticipate," "believe," "expect," "projected" and "goals" signify forward-looking statements. Forward-looking statements are not guarantees of future results and conditions, but rather are subject to numerous assumptions, risks and uncertainties that may cause actual future results to be materially different from those contemplated, projected, estimated or budgeted. Many factors may impact forward-looking statements including, but not limited to, the following:

impact of regulation by the FERC, MPSC, NRC and other applicable governmental proceedings and regulations, including any associated impact on rate structures;
the amount and timing of cost recovery allowed as a result of regulatory proceedings, related appeals or new legislation;
impact of electric utility restructuring in Michigan, including legislative amendments and Customer Choice programs;
economic conditions and population changes in our geographic area resulting in changes in demand, customer conservation, and increased thefts of electricity;
changes in the economicelectricity and financial viability of our customers, suppliers, and trading counterparties, and the continued ability of such parties to perform their obligations to the Company;
economic climate and population changes in the geographic areas where we do business;
high levels of uncollectible accounts receivable;
environmental issues, laws, regulations, and the increasing costs of remediation and compliance, including actual and potential new federal and state requirements;
health, safety, financial, environmental and regulatory risks associated with ownership and operation of nuclear facilities;
changes in the cost and availability of coal and other raw materials and purchased power;
access to capital markets and capital market conditions and the results of other financing efforts which can be affected by credit agency ratings;
instability in capital markets which could impact availability of short and long-term financing;
the timing and extent of changes in interest rates;
the level of borrowings;
the potential for losses on investments, including nuclear decommissioning and benefit plan assets and the related increases in future expense and contributions;
the potential for increased costs or delays in completion of significant construction projects;
the effects of weather and other natural phenomena on operations and sales to customers, and purchases from suppliers;
environmental issues, laws, regulations, and the increasing costs of remediation and compliance, including actual and potential new federal and state requirements that include or could include carbon and more stringent emission controls, a renewable portfolio standard, energy efficiency mandates, a carbon tax or cap and trade structure and ash landfill regulations;
nuclear regulations and operations associated with nuclear facilities;
impact of electric utility restructuring in Michigan, including legislative amendments and Customer Choice programs;
employee relations and the impact of collective bargaining agreements;
unplanned outages;
changes in the cost and availability of coal and other raw materials and purchased power;
cost reduction efforts and the maximization of plant and distribution system performance;
the effects of competition;
impact of regulation by the FERC, MPSC, NRC and other applicable governmental proceedings and regulations, including any associated impact on rate structures;
changes in and application of federal, state and local tax laws and their interpretations, including the Internal Revenue Code, regulations, rulings, court proceedings and audits;
the amounteffects of weather and timing of cost recovery allowed as a result of regulatory proceedings, related appeals or new legislation;
other natural phenomena on operations and sales to customers, and purchases from suppliers;
unplanned outages;
the cost of protecting assets against, or damage due to, terrorism or cyber attacks;
employee relations and the impact of collective bargaining agreements;

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the availability, cost, coverage and terms of insurance and stability of insurance providers;
cost reduction efforts and the maximization of plant and distribution system performance;
the effects of competition;
changes in and application of accounting standards and financial reporting regulations;
changes in federal or state laws and their interpretation with respect to regulation, energy policy and other business issues; and
binding arbitration, litigation and related appeals.appeals; and
the risks discussed in our public filings with the Securities and Exchange Commission.
New factors emerge from time to time. We cannot predict what factors may arise or how such factors may cause our results to differ materially from those contained in any forward-looking statement. Any forward-looking statements refer only as of the date on which such statements are made. We undertake no obligation to update any forward-looking statement to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events.

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Part I
Items 1. and 2. Business and Properties
General
Detroit Edison is a Michigan corporation organized in 1903 and is a wholly-owned subsidiary of DTE Energy. Detroit Edison is a public utility subject to regulation by the MPSC and the FERC. Detroit Edison is engaged in the generation, purchase, distribution and sale of electricity to approximately 2.1 million customers in southeastern Michigan.
References in this report to “we,” “us,” “our” or “Company” are to Detroit Edison.
Our generating plants are regulated by numerous federal and state governmental agencies, including, but not limited to, the MPSC, the FERC, the NRC, the EPA and the MDNRE.MDEQ. Electricity is generated from our several fossilfossil-fuel plants, a hydroelectric pumped storage plant and a nuclear plant, and is purchased from electricity generators, suppliers and wholesalers.
The electricity we produce and purchase is sold to three major classes of customers: residential, commercial and industrial, principally throughout southeastern Michigan.
Revenue by Service
             
(in Millions) 2010  2009  2008 
Residential $2,052  $1,820  $1,726 
Commercial  1,629   1,702   1,753 
Industrial  688   730   894 
Other  479   299   289 
          
Subtotal  4,848   4,551   4,662 
Interconnection sales(1)  145   163   212 
          
Total Revenue $4,993  $4,714  $4,874 
          

(in Millions)2011 2010 2009
Residential$2,182
 $2,052
 $1,820
Commercial1,704
 1,629
 1,702
Industrial692
 688
 730
Other456
 479
 299
Subtotal5,034
 4,848
 4,551
Interconnection sales (1)118
 145
 163
Total Revenue$5,152
 $4,993
 $4,714

(1)Represents power that is not distributed by Detroit Edison.
Weather, economic factors, competition and electricity prices affect sales levels to customers. Our peak load and highest total system sales generally occur during the third quarter of the year, driven by air conditioning and other cooling-related demands. Our operations are not dependent upon a limited number of customers, and the loss of any one or a few customers would not have a material adverse effect on Detroit Edison.
Fuel Supply and Purchased Power
Our power is generated from a variety of fuels and is supplemented with purchased power. We expect to have an adequate supply of fuel and purchased power to meet our obligation to serve customers. Our generating capability is heavily dependent upon the availability of coal. Coal is purchased from various sources in different geographic areas under agreements that vary in both pricing and terms. We expect to obtain the majority of our coal requirements through long-term contracts, with the balance to be obtained through short-term agreements and spot purchases. We have long-term and short-termshort term contracts for a totalthe purchase of approximately 3029 million tons of low-sulfur western coal to be delivered from 20112012 through 20132014 and approximately 56 million tons of Appalachian coal to be delivered from 20112012 through 2012.2014. All of these contracts have pricing schedules. We have approximately 98%95% of our 20112012 expected coal requirements under contract. Given the geographic diversity of supply, we believe we can meet our expected generation requirements. We lease a fleet of rail cars and have our expected western rail requirements under contract for the next fivefour years. All of our expected eastern coal rail requirements are under contract through 2012 and approximately 50% of this requirement is under contract in 2013. Our expected vessel transportation requirements for delivery of purchased coal to our generating facilities are under contract through 2014.
Detroit Edison participates in the energy market through MISO. We offer our generation in the market on a day-ahead real-time and FTRreal-time basis and bid for power in the market to serve our load. We are a net purchaser of power that supplements our generation capability to meet customer demand during peak cycles.

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In 2008, a renewable portfolio standard was established for Michigan electric providers targeting 10%4


Properties
Detroit Edison owns generating plants and facilities that are located in the State of Michigan. Substantially all of our property is subject to the lien of a mortgage.
Generating plants owned and in service as of December 31, 20102011 are as follows:
             
    Summer Net  
  Location by Rated  
  Michigan Capability(1)  
Plant Name County (MW) (%) Year in Service
Fossil-fueled Steam-Electric            
Belle River(2) St. Clair  1,044   9.5  1984 and 1985
Conners Creek Wayne  239   2.1  1951
Greenwood St. Clair  785   7.1  1979
Harbor Beach Huron  94   0.9  1968
Marysville St. Clair  84   0.8  1943 and 1947
Monroe(3) Monroe  3,027   27.6  1971, 1973 and 1974
River Rouge Wayne  523   4.8  1957 and 1958
St. Clair(4) St. Clair  1,368   12.5  1953, 1954, 1959, 1961 and 1969
Trenton Channel Wayne  698   6.4  1949 and 1968
             
     7,862   71.7   
Oil or Gas-fueled Peaking Units Various  1,101   10.0  1966-1971, 1981 and 1999
Nuclear-fueled Steam-Electric Fermi 2(5) Monroe  1,087   9.9  1988
Hydroelectric Pumped Storage Ludington(6) Mason  917   8.4  1973
             
     10,967   100.0   
             
  
Location by
Michigan
 
Summer Net
Rated
Capability (1)
  
Plant Name County (MW) (%) Year in Service
Fossil-fueled Steam-Electric      
  
Belle River (2) St. Clair 1,047
  10.0
 1984 and 1985
Greenwood St. Clair 782
  7.5
 1979
Harbor Beach Huron 93
  0.9
 1968
Monroe (3) Monroe 2,893
  27.7
 1971, 1973 and 1974
River Rouge Wayne 525
  5.0
 1957 and 1958
St. Clair St. Clair 1,382
  13.3
 1953, 1954, 1959, 1961 and 1969
Trenton Channel Wayne 674
  6.5
 1949 and 1968
    7,396
  70.9
  
Oil or Gas-fueled Peaking Units Various 1,026
  9.8
 1966-1971, 1981 and 1999
Nuclear-fueled Steam-Electric Fermi 2 (4) Monroe 1,086
  10.4
 1988
Hydroelectric Pumped Storage
Ludington (5)
 Mason 917
  8.9
 1973
    10,425
  100.0
  

(1)Summer net rated capabilities of generating plants in service are based on periodic load tests and are changed depending on operating experience, the physical condition of units, environmental control limitations and customer requirements for steam, which otherwise would be used for electric generation.
(2)The Belle River capability represents Detroit Edison’sEdison's entitlement to 81% of the capacity and energy of the plant. See Note 76 of the Notes to the Consolidated Financial Statements in Item 8 of this Report.
(3)The Monroe powergenerating plant provided 38% of Detroit Edison’sEdison's total 20102011 power generation.
(4)Excludes one oil-fueled unit (250 MW) in cold standby status.
(5)Fermi 2 has a design electrical rating (net) of 1,150 MW.
(6)(5)Represents Detroit Edison’sEdison's 49% interest in Ludington with a total capability of 1,872 MW. See Note 76 of the Notes to the Consolidated Financial Statements in Item 8 of this Report.
In December 2011, the Connors Creek (239 MW) and Marysville (84 MW) generating plants and Unit No. 5 at the St. Clair generating plant (250 MW) were retired consistent with Detroit Edison's operational plan.
In 2008, a renewable portfolio standard was established for Michigan electric providers targeting 10% of electricity sold to retail customers from renewable energy by 2015. Detroit Edison has approximately 500 MW of owned or contracted renewable energy under contract at December 31, 2011 representing approximately 6% of electricity sold to retail customers. Approximately 120 MW is in commercial operation at December 31, 2011 with an additional 380 MW expected in commercial operation in 2012 or early 2013.
Detroit Edison owns and operates 674671 distribution substations with a capacity of approximately 33,585,00033,516,000 kilovolt-amperes (kVA) and approximately 412,100428,300 line transformers with a capacity of approximately 23,849,00024,421,000 kVA.
Circuit miles of electric distribution lines owned and in service as of December 31, 2010:2011:
        
  Circuit Miles
Operating Voltage-Kilovolts (kV) Overhead   Underground
4.8 kV to 13.2 kV  28,345   13,916
24 kV  181   696
40 kV  2,278   381
120 kV  54   13
       
   30,858   15,006
       

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  Circuit Miles
Operating Voltage-Kilovolts (kV) Overhead Underground
4.8 kV to 13.2 kV 28,544
  14,105
 
24 kV 182
  696
 
40 kV 2,277
  382
 
120 kV 54
  8
 
  31,057
  15,191
 


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There are numerous interconnections that allow the interchange of electricity between Detroit Edison and electricity providers external to our service area. These interconnections are generally owned and operated by ITC Transmission, an unrelated company, and connect to neighboring energy companies.
Regulation
Detroit Edison’sEdison's business is subject to the regulatory jurisdiction of various agencies, including, but not limited to, the MPSC, the FERC and the NRC. The MPSC issues orders pertaining to rates, recovery of certain costs, including the costs of generating facilities and regulatory assets, conditions of service, accounting and operating-related matters. Detroit Edison’sEdison's MPSC-approved rates charged to customers have historically been designed to allow for the recovery of costs, plus an authorized rate of return on our investments. The FERC regulates Detroit Edison with respect to financing authorization and wholesale electric activities. The NRC has regulatory jurisdiction over all phases of the operation, construction, licensing and decommissioning of Detroit Edison’sEdison's nuclear plant operations. We are subject to the requirements of other regulatory agencies with respect to safety, the environment and health.
See Note 4, 8, 10Notes 3, 7, 9 and 1615 of the Notes to Consolidated Financial Statements in Item 8 of this Report.
Energy Assistance Programs
Energy assistance programs, funded by the federal government and the State of Michigan, remain critical to Detroit Edison’sEdison's ability to control its uncollectible accounts receivable and collections expenses. Detroit Edison’sEdison's uncollectible accounts receivable expense is directly affected by the level of government fundedgovernment-funded assistance its qualifying customers receive. We work continuously with the State of Michigan and others to determine whether the share of funding allocated to our customers is representative of the number of low-income individuals in our service territory. We also partner with federal, state and local officials to attempt to increase the share of low-income funding allocated to our customers. Changes in the level of funding provided to our low-income customers will affect the level of uncollectible expense.
Strategy and Competition
We strive to be the preferred supplier of electrical generation in southeast Michigan. We can accomplish this goal by working with our customers, communities and regulatory agencies to be a reliable, low-cost supplier of electricity. To ensure generation and network reliability we continue to make capital investments in our generating plants and distribution system, which will improve plant availability, operating efficiencies and environmental compliance in areas that have a positive impact on reliability with the goal of high customer satisfaction.
Our distribution operations focus on improving reliability, restoration time and the quality of customer service. We seek to lower our operating costs by improving operating efficiencies. Revenues from year to year will vary due to weather conditions, economic factors, regulatory events and other risk factors as discussed in the “Risk Factors” in Item 1A. of this Report. We are minimizing the impacts of changes in average customer usage through regulatory mechanisms which decouple our revenue levels from sales volumes.
The electric Customer Choice program in Michigan allows all of our electric customers to purchase their electricity from alternative electric suppliers of generation services, subject to limits. Customers choosing to purchase power from alternative electric suppliers represented approximately 10% of retail sales in 2011 and 2010 and 3% of retail sales in 2009 and 2008.2009. Customers participating in the electric Customer Choice program consist primarily of industrial and commercial customers whose MPSC-authorized full service rates exceed their cost of service.market costs. MPSC rate orders and 2008 energy legislation enacted by the State of Michigan are adjusting the pricing disparity over five years and have placed a 10% cap on the total potential Customer Choice related migration, mitigating some of the unfavorable effects of electric Customer Choice on our financial performance. In addition, we havehad a Choice Incentive Mechanism, which iswas an over/under recovery mechanism that measuresmeasured non-fuel revenues lost or gained as a result of fluctuations in electric Customer Choice sales. If annualEffective with the October 2011 MPSC rate order, this mechanism has been terminated and our customer rates reflect the current level of electric Customer Choice sales exceed the baseline amount from Detroit Edison’s most recent rate case, 90 percent of its lost non-fuel revenues associated with sales above that level may be recovered from full service customers. If annual electric Customer Choice sales decrease below the baseline, the Company must refund 90 percent of its increase in non-fuel revenues associated with sales below that level to full service customers.sales. We expect that in 20112012 customers choosing to purchase power from alternative electric suppliers will represent approximately 10% of retail sales.

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Competition in the regulated electric distribution business is primarily from the on-site generation of industrial customers and from distributed generation applications by industrial and commercial customers. We do not expect significant competition for distribution to any group of customers in the near term.

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ENVIRONMENTAL MATTERS
We are subject to extensive environmental regulation. Additional costs may result as the effects of various substances on the environment are studied and governmental regulations are developed and implemented. Actual costs to comply could vary substantially. We expect to continue recovering environmental costs through rates charged to our customers. The following table summarizes our estimated significant future environmental expenditures based upon current regulations:
     
(in Millions)    
Air $2,100 
Water  55 
MGP sites  4 
Other sites  21 
    
Estimated total future expenditures through 2020 $2,180 
    
Estimated 2011 expenditures $239 
    
Estimated 2012 expenditures $276 
    
(in Millions) 
Air$1,921
Water80
Contaminated and other sites17
Estimated total future expenditures through 2021$2,018
Estimated 2012 expenditures$255
Estimated 2013 expenditures$311
Air -Detroit Edison is subject to the EPA ozone and fine particulate transport and acid rain regulations that limit power plant emissions of sulfur dioxide and nitrogen oxides. Since 2005, the EPA and the State of Michigan have issued additional emission reduction regulations relating to ozone, fine particulate, regional haze, mercury and mercuryother air pollution. The newThese rules will lead to additional controls on fossil-fueled power plants to reduce nitrogen oxide, sulfur dioxide, mercury and mercuryother emissions. Further, additional rulemakings are expected over the next few years which could require additional controls for sulfur dioxide, nitrogen oxides and hazardous air pollutants. It is not possible to quantifypollutants over the impact of those expected rulemakings at this time.next few years.
In July 2009, DTE Energy received a Notice of Violation/Finding of Violation (NOV/FOV) from the EPA alleging, among other things, that five Detroit Edison power plants violated New Source Performance standards, Prevention of Significant Deterioration requirements, and operating permit requirements under the Clean Air Act. An additional NOV/FOV was received in June 2010 related to a recent project and outage at Unit 2 of the Monroe Power Plant.
On August 5, 2010, the United States Department of Justice, at the request of the EPA, brought a civil suit in the U.S. District Court for the Eastern District of Michigan against DTE Energy and Detroit Edison, related to the June 2010 NOV/FOV and the outage work performed at Unit 2 of the Monroe Power Plant, but not relating to the July 2009 NOV/FOV. Among other relief, the EPA requested the court to require Detroit Edison to install and operate the best available control technology at Unit 2 of the Monroe Power Plant. Further, the EPA requested the court to issue a preliminary injunction to require Detroit Edison to (i) begin the process of obtaining the necessary permits for the Monroe Unit 2 modification and (ii) offset the pollution from Monroe Unit 2 through emissions reductions from Detroit Edison’s fleet of coal-fired power plants until the new control equipment is operating. In January 2011, the EPA’s motion for preliminary injunction was denied and the liability phase of the civil suit has been scheduled for trial in May 2011.
DTE Energy and Detroit Edison believe that the plants identified by the EPA, including Unit 2 of the Monroe Power Plant, have complied with all applicable federal environmental regulations. Depending upon the outcome of discussions with the EPA regarding the NOV/FOV and the result of the civil action, the Company could also be required to install additional pollution control equipment at some or all of the power plants in question, implement early retirement of facilities where control equipment is not economical, engage in supplemental environmental programs, and/or pay fines. The Company cannot predict the financial impact or outcome of this matter, or the timing of its resolution.
Water - In response to an EPA regulation, Detroit Edison is required to examine alternatives for reducing the environmental impacts of the cooling water intake structures at several of its facilities. Based on the results of completed studies and expected future studies, Detroit Edison may be required to install additional control technologies to reduce the impacts of the water intakes. Initially, it was estimatedIn addition, there are proposed rules that Detroit Edison could incur up to approximately $55 million in additional capital expenditures overmay require the four to six years subsequent to 2008 to comply with these requirements. However, a January 2007 circuit court decision remanded back to the EPA several

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provisionsinstallation of the federal regulation that has resulted in a delay in compliance dates. The decision also raised the possibility that Detroit Edison may have to install cooling towers at some facilities at a cost substantially greater than was initially estimated for other mitigative technologies. In 2008, the Supreme Court agreed to review the remanded cost-benefit analysis provision of the rule and in April 2009 upheld the EPA’s use of this provision in determining best technology available for reducing environmental impacts. Concurrently, the EPA continues to develop a revised rule, a draft of which is expected to be published in the first quarter of 2011, with a final rule scheduled for mid-2012. The EPA has also issued an information collection request to begin a review of steam electric effluent guidelines. It is not possible at this time to quantify the impacts of these developing requirements.
Manufactured Gas Plant (MGP)Contaminated and Other Sites -Prior to the construction of major interstate natural gas pipelines, gas for heating and other uses was manufactured locally from processes involving coal, coke or oil. The facilities, which produced gas, have been designated as MGPmanufactured gas plant (MGP) sites. Detroit Edison owns, or previously owned, three former MGP sites. In addition to the MGP sites, we
We are also in the process of cleaning up other sites where contamination is present as a result of historical and ongoing utility operations. These other sites include an engineered ash storage facility, electrical distribution substations, and underground and aboveground storage tank locations. Cleanup activities associated with these sites will be conducted over the next several years.
Landfill— Detroit Edison owns Any significant change in assumptions, such as remediation techniques, nature and operates a permitted engineered ash storage facility atextent of contamination and regulatory requirements, could impact the Monroe Power Plant to disposeestimate of fly ash fromremedial action costs for these sites and affect the coal fired power plant. Detroit Edison performed an engineering analysis in 2009Company's financial position and identified the need for embankment side slope repairs and reconstruction.cash flows.
The EPA has published proposed rules to regulate coal ash, under the authority of the Resources Conservation and Recovery Act (RCRA). The proposed rule published on June 21, 2010 contains two primary regulatory options to regulate coal ash residue. The EPA is currently considering either, to designate coal ash aswhich may result in a “Hazardous Waste” as defined by RCRA or to regulate coal ash as non-hazardous waste under RCRA. However, agencies and legislatures have urged the EPA to regulate coal ash as a non-hazardous waste. If the EPA were to designate coal ashdesignation as a hazardous waste, the agencywaste. The EPA could apply some, or all, of the disposal and reuse standards that have been applied to other existing hazardous wastes. Some of the regulatory actions currently being contemplated could have a significant impact on our operations and financial position and the rates we charge our customers. It is not possible to quantify the impact of those expected rulemakings at this time.
Global Climate Change
Climate regulation and/or legislation is being proposed and discussed within the U.S. Congress and the EPA. Despite passage of a greenhouse gas cap and trade bill by the U.S. House in June 2009, the Senate has been unable to pass a similar climate bill. A greenhouse gas cap and trade program is not expected to be included in energy or climate bills to be considered by the 112th Congress. Meanwhile, the EPA is beginning to implement regulatory actions under the Clean Air Act to address emission of greenhouse gases. The EPA regulation of greenhouse gases (GHGs) begins in 2011 requiring the best available control technology (BACT) for major sources or modifications to existing major sources that cause significant increases in GHG emissions. The impact of this rule is uncertain until BACT is better defined by the permitting agencies. Pending or future legislation or other regulatory actions could have a material impact on our operations and financial position and the rates we charge our customers. Impacts include expenditures for environmental equipment beyond what is currently planned, financing costs related to additional capital expenditures, the purchase of emission offsets from market sources and the retirement of facilities where control equipment is not economical. We would seek to recover these incremental costs through increased rates charged to our utility customers. Increased costs for energy produced from traditional sources could also increase the economic viability of energy produced from renewable and/or nuclear sources and energy efficiency initiatives and the development of market-based trading of carbon offsets providing business opportunities for Detroit Edison. It is not possible to quantify these impacts on Detroit Edison or its customers at this time.
See Notes 109 and 1615 of the Notes to Consolidated Financial Statements in Item 8 of this Report.

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EMPLOYEES
We had approximately 4,7004,800 employees as of December 31, 2010,2011, of which approximately 2,7002,800 were represented by unions. The majority of our union employees are under contracts that expire in August 2012 and June 2013.
Item 1A. Risk Factors
There are various risks associated with the operations of Detroit Edison. To provide a framework to understand the operating environment of the Company, we are providing a brief explanation of the more significant risks associated with our business. Although we have tried to identify and discuss key risk factors, others could emerge in the future. Each of the following risks could affect our performance.
Regional and national economic conditions can have an unfavorable impact on us.Our business follows the economic cycles of the customers we serve. We provide services to the domestic automotive and steel industries which have undergone considerable financial distress, exacerbating the decline in regional economic conditions. Should national or regional economic conditions further decline, reduced volumes of electricity and collections of accounts receivable could result in decreased earnings and cash flow.
We are exposed to credit risk of counterparties with whom we do business.Adverse economic conditions affecting, or financial difficulties of, counterparties with whom we do business could impair the ability of these counterparties to pay for our services or fulfill their contractual obligations, or cause them to delay such payments or obligations. We depend on these counterparties to remit payments on a timely basis. Any delay or default in payment could adversely affect our cash flows, financial position, or results of operations.
We are subject to rate regulation.regulation.  Our electric rates are set by the MPSC and the FERC and cannot be changed without regulatory authorization. We may be negatively impacted by new regulations or interpretations by the MPSC, the FERC or other regulatory bodies. Our ability to recover costs may be impacted by the time lag between the incurrence of costs and the

7


recovery of the costs in customers’customers' rates. Our regulators also may decide to disallow recovery of certain costs in customers’customers' rates if they determine that those costs do not meet the standards for recovery under our governing laws and regulations. The StateWe typically self-implement base rate changes six months after rate case filings in accordance with Michigan law. However, if the final rates authorized by our regulators in the final rate order are lower than the amounts we collected during the self-implementation period, we must refund the difference with interest. Our regulators may also disagree with our rate calculations under the various tracking and decoupling mechanisms that are intended to mitigate the risk of Michigan elected a new governor and legislature in November 2010 andcertain aspects of our business. If we cannot agree with our regulators on an appropriate reconciliation of those mechanisms, it may impact our ability to recover certain costs through our customer rates. Our regulators may also decide to eliminate more of these mechanisms in future rate cases, which may make it more difficult for us to recover our costs in the rates we charge customers. We cannot predict whether the resulting changeswhat rates an MPSC order will adopt in political conditions will affect the regulations or interpretations affecting Detroit Edison. future rate cases.New legislation, regulations or interpretations could change how our business operates, impact our ability to recover costs through rate increasesrates or require us to incur additional expenses.
We may be requiredChanges to refund amounts we collect under self-implemented rates.Michigan law allows utilities to self-implement rate changes six months after a rate filing, subject to certain limitations. However, if the final rate case order provides for lower rates than we have self-implemented, we must refund the difference, with interest. We have self-implemented rates in the past and have been ordered to make refunds to customers. Our financial performance may be negatively affected if the MPSC sets lower rates in future rate cases than those we have self-implemented, thereby requiring us to issue refunds. We cannot predict what rates an MPSC order will adopt in future rate cases.
Michigan’sMichigan's electric Customer Choice program could negatively impact our financial performance.The electric Customer Choice program, as originally contemplated in Michigan, anticipated an eventual transition to a totally deregulated and competitive environment where customers would be charged market-based rates for their electricity. The State of Michigan currently experiences a hybrid market, where the MPSC continues to regulate electric rates for our customers, while alternative electric suppliers charge market-based rates. In addition, such regulated electric rates for certain groups of our customers exceed the cost of service to those customers. Due to distorted pricing mechanisms during the initial implementation period of electric Customer Choice, many commercial customers chose alternative electric suppliers. MPSC rate orders and 2008 energy legislation enacted by the State of Michigan are phasing out the pricing disparity over five years and have placed a 10 percent cap on the total potential Customer Choice related migration. However, even with the electric Customer Choice-related relief received in recent Detroit Edison rate orders and the legislated 10 percent cap on participation in the electric Customer Choice program, there continues to be legislative and financial risk associated with the electric Customer Choice program. Electric Customer Choice migration is sensitive to market price and full service electric price changes.

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Regional and national economic conditions can have an unfavorable impact on us.  Our business follows the economic cycles of the customers we serve and the credit risk of counterparties we do business with. We provide services to the domestic automotive and steel industries which have undergone considerable financial distress, exacerbating the decline in regional economic conditions. Should national or regional economic conditions deteriorate, reduced volumes of electricity, collections of accounts receivable, and reductions in federal and state energy assistance funding could result in decreased earnings and cash flow.


Environmental laws and liability may be costly.We are subject to and affected by numerous environmental regulations. These regulations govern air emissions, water quality, wastewater discharge and disposal of solid and hazardous waste. Compliance with these regulations can significantly increase capital spending, operating expenses and plant down times.times and can negatively affect the affordability of the rates we charge to our customers.
Uncertainty around future environmental regulations creates difficulty planning long-term capital projects in our generation fleet. These laws and regulations require us to seek a variety of environmental licenses, permits, inspections and other regulatory approvals. We could be required to install expensive pollution control measures or limit or cease activities based on these regulations. Additionally, we may become a responsible party for environmental cleanup at sites identified by a regulatory body. We cannot predict with certainty the amount and timing of future expenditures related to environmental matters because of the difficulty of estimating clean up costs. There is also uncertainty in quantifying liabilities under environmental laws that impose joint and several liability on potentially responsible parties.
We may also incur liabilities as a result of potential future requirements to address climate change issues. Proposals for voluntary initiatives and mandatory controls are being discussed both in the United States and worldwide to reduce greenhouse gases such as carbon dioxide, a by-product of burning fossil fuels. If increased regulation of greenhouse gas emissions are implemented, the operations of our fossil-fuel generation assets may be significantly impacted. Since there can be no assurances that environmental costs may be recovered through the regulatory process, our financial performance may be negatively impacted as a result of environmental matters.
Operation of a nuclear facility subjects us to risk. Ownership of an operating nuclear generating plant subjects us to significant additional risks. These risks include, among others, plant security, environmental regulation and remediation, changes in federal nuclear regulation and operational factors that can significantly impact the performance and cost of operating a nuclear facility. While we maintain insurance for various nuclear-related risks, there can be no assurances that such insurance will be sufficient to cover our costs in the event of an accident or business interruption at our nuclear generating plant, which may affect our financial performance.

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The supply and/or price of energy commodities and/or related services may impact our financial results.  We are dependent on coal for much of our electrical generating capacity. Price fluctuations, fuel supply disruptions and changes in transportation costs could have a negative impact on the amounts we charge our utility customers for electricity. We have hedging strategies and regulatory recovery mechanisms in place to mitigate some of the negative fluctuations in commodity supply prices, but there can be no assurances that our financial performance will not be negatively impacted by price fluctuations.
The supply and/or price of other industrial raw and finished inputs and/or related services may impact our financial results.  We are dependent on supplies of certain commodities, such as copper and limestone, among others, and industrial materials and services in order to maintain day-to-day operations and maintenance of our facilities. Price fluctuations or supply interruptions for these commodities and other items could have a negative impact on the amounts we charge our customers for our products.
Adverse changes in our credit ratings may negatively affect us.Regional and national economic conditions,conditions, increased scrutiny of the energy industry and regulatory changes, as well as changes in our economic performance, could result in credit agencies reexamining our credit rating. While credit ratings reflect the opinions of the credit agencies issuing such ratings and may not necessarily reflect actual performance, a downgrade in our credit rating below investment grade could restrict or discontinue our ability to access capital markets and could result in an increase in our borrowing costs, a reduced level of capital expenditures and could impact future earnings and cash flows. In addition, a reduction in credit rating may require us to post collateral related to various physical or financially settled contracts for the purchase of energy-related commodities, products and services, which could impact our liquidity.
Our ability to access capital markets is important.Our ability to access capital markets is important to operate our businesses. In the past, turmoil in credit markets has constrained, and may again in the future constrain, our ability as well as the ability of our subsidiaries to issue new debt, including commercial paper, and refinance existing debt at reasonable interest rates. In addition, the level of borrowing by other energy companies and the market as a whole could limit our access to capital markets. We have substantial amounts ofOur long term revolving credit facilities thatfacility does not expire in 2012until 2015, but we regularly access capital markets to refinance existing debt or fund new projects, and 2013. We intend to seek to renew the facilities on or before the expiration dates. However, we cannot predict the outcome of these efforts, which could result in a decrease in amounts available and/pricing or an increase in our borrowing costs and negatively impact our financial performance.demand for those future transactions.
Poor investment performance of pension and other postretirement benefit plan holdings and other factors impacting benefit plan costs could unfavorably impact our liquidity and results of operations.Detroit Edison participates in various plans that provide pension and other postretirement benefits for DTE Energy and its affiliates.  Our costs of providing non-contributory defined benefit pension plans and other postretirement benefit plans are dependent upon a number of factors, such as the rates of return on plan assets, the level of interest rates used to measure the required minimum funding levels of the plans, future government regulation, and our required or voluntary contributions made to the plans. The performance of the debt and equity markets affects the value of assets that are held in trust to satisfy future obligations under our plans. We have significant benefit obligations and hold significant assets in trust to satisfy these obligations. These assets are subject to market fluctuations and will yield uncertain returns, which may fall below our projected return rates. A decline in the market value of the pension and postretirement benefit plan assets will increase the funding requirements under our pension and postretirement benefit plans if the actual asset returns do not recover these declines in the foreseeable future. Additionally, our pension and postretirement benefit plan liabilities are sensitive to changes in interest rates. As interest rates decrease, the liabilities increase, potentiallyresulting in increasing benefit expense and funding requirements. Also, if future increases in pension and postretirement benefit costs as a result of reduced plan assets are not recoverable from Detroit Edison customers, the results of operations and financial position of our company could be negatively affected. Without sustained growth in the plan investments over time to increase the value of our plan assets, we could be required to fund our plans

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with significant amounts of cash. Such cash funding obligations could have a material impact on our cash flows, financial position, or results of operations.
Construction and capital improvements to our power facilities subject us to risk. We are managing ongoing and planning future significant construction and capital improvement projects at multiple power generation and distribution facilities. Many factors that could cause delays or increased prices for these complex projects are beyond our control, including the cost of materials and labor, subcontractor performance, timing and issuance of necessary permits, construction disputes and weather conditions. Failure to complete these projects on schedule and on budget for any reason could adversely affect our financial performance and operations at the affected facilities.
Weather significantly affects operations.operations.  Deviations from normal hot and cold weather conditions affect our earnings and cash flow. Mild temperatures can result in decreased utilization of our assets, lowering income and cash flow. Ice storms, tornadoes, or high winds can damage the electric distribution system infrastructure and require us to perform emergency repairs and incur material unplanned expenses. The expenses of storm restoration efforts may not be fully recoverable through the regulatory process.
Operation of a nuclear facility subjects us to risk.Ownership of an operating nuclear generating plant subjects us to significant additional risks. These risks include, among others, plant security, environmental regulation and remediation, and operational factors that can significantly impact the performance and cost of operating a nuclear facility. While we maintain insurance for various nuclear-related risks, there can be no assurances that such insurance will be sufficient to cover our costs in the event of an accident or business interruption at our nuclear generating plant, which may affect our financial performance.
Construction and capital improvements to our power facilities subject us to risk.We are managing ongoing and planning future significant construction and capital improvement projects at multiple power generation and distribution facilities. Many factors that could cause delay or increased prices for these complex projects are beyond our control, including the cost of materials and labor, subcontractor performance, timing and issuance of necessary permits, construction disputes and weather conditions. Failure to complete these projects on schedule and on budget for any reason could adversely affect our financial performance and operations at the affected facilities.
The supply and/or price of energy commodities and/or related services may impact our financial results.We are dependent on coal for much of our electrical generating capacity. Price fluctuations, fuel supply disruptions and increases in transportation costs could have a negative impact on the amounts we charge our customers for electricity. We have hedging strategies and regulatory recovery mechanisms in place to mitigate negative fluctuations in commodity supply prices, but there can be no assurances that our financial performance will not be negatively impacted by price fluctuations.
The supply and/or price of other industrial raw and finished inputs and/or related services may impact our financial results.We are dependent on supplies of certain commodities, such as copper and limestone, among others, and industrial materials and services in order to maintain day-to-day operations and maintenance of our facilities. Price fluctuations or supply interruptions for these commodities and other items could have a negative impact on the amounts we charge our customers for our products.
Unplanned power plant outages may be costly.Unforeseen maintenance may be required to safely produce electricity or comply with environmental regulations. As a result of unforeseen maintenance, we may be required to
make spot market purchases of electricity that exceed our costs of generation. Our financial performance may be negatively affected if we are unable to recover such increased costs.

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Renewable portfolio standards and energy efficiency programs may affect our business.We are subject to existing Michigan and potential future federal legislation and regulation requiring us to secure sources of renewable energy. Under the current Michigan legislation we will be required in the future to provide a specified percentage of our power from Michigan renewable energy sources. We are developing a strategy for complying with the existing state legislation, but we do not know what requirements may be added by federal legislation. In addition, there could be additional state requirements increasing the percentage of power to be provided by renewable energy sources. We are actively engaged in developing renewable energy projects and identifying third party projects in which we can invest. We cannot predict the financial impact or costs associated with these future projects.
We are also required by Michigan legislation to implement energy efficiency measures and provide energy efficiency customer awareness and education programs. These requirements necessitate expenditures and implementation of these programs creates the risk of reducing our revenues as customers decrease their energy usage. We do not know how these programs will impact our business and future operating results.
Threats of terrorism or cyber attacks could affect our business.We may be threatened by problems such as computer viruses or terrorism that may disrupt our operations and could harm our operating results. Our industry requires the continued operation of sophisticated information technology systems and network infrastructure.

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Despite our implementation of security measures, all of our technology systems are vulnerable to disability or failures due to hacking, viruses, acts of war or terrorism and other causes. If our information technology systems were to fail and we were unable to recover in a timely way, we might be unable to fulfill critical business functions, which could have a material adverse effect on our business, operating results, and financial condition.
In addition, our generation plants and electrical distribution facilities in particular may be targets of terrorist activities that could disrupt our ability to produce or distribute some portion of our energy products. We have increased security as a result of past events and we may be required by our regulators or by the future terrorist threat environment to make investments in security that we cannot currently predict.
Failure to maintain the security of personally identifiable information could adversely affect us.  In connection with our business we collect and retain personally identifiable information of our customers, shareholders and employees. Our customers, shareholders and employees expect that we will adequately protect their personal information, and the United States regulatory environment surrounding information security and privacy is increasingly demanding. A significant theft, loss or fraudulent use of customer, shareholder, employee or Detroit Edison data by cybercrime or otherwise could adversely impact our reputation and could result in significant costs, fines and litigation.
Failure to retain and attract key executive officers and other skilled professional and technical employees could have an adverse effect on our operations.  Our business is dependent on our ability to recruit, retain, and motivate employees. Competition for skilled employees in some areas is high and the inability to retain and attract these employees could adversely affect our business and future operating results.
A work interruption may adversely affect us.  Unions represent approximately 2,800 of our employees. Our contract with one union representing about 500 of our electrical linemen is due to expire in August 2012. We cannot predict the outcome of those negotiations. A union choosing to strike would have an impact on our business. We are unable to predict the effect a work stoppage would have on our costs of operation and financial performance.

We may not be fully covered by insurance.We have a comprehensive insurance program in place to provide coverage for various types of risks, including catastrophic damage as a result of acts of God, terrorism or a combination of other significant unforeseen events that could impact our operations. Economic losses might not be covered in full by insurance or our insurers may be unable to meet contractual obligations.
Failure to maintain the security of personally identifiable information could adversely affect us. In connection with our business we collect and retain personally identifiable information of our customers and employees. Our customers and employees expect that we will adequately protect their personal information, and the United States regulatory environment surrounding information security and privacy is increasingly demanding. A significant theft, loss or fraudulent use of customer, employee or Detroit Edison data by cybercrime or otherwise could adversely impact our reputation and could result in significant costs, fines and litigation.
A work interruption may adversely affect us.Unions represent approximately 2,700 of our employees. A union choosing to strike would have an impact on our business. We are unable to predict the effect a work stoppage would have on our costs of operation and financial performance.
Failure to retain and attract key executive officers and other skilled professional and technical employees could have an adverse effect on our operations.Our business is dependent on our ability to recruit, retain, and motivate employees. Competition for skilled employees in some areas is high and the inability to retain and attract these employees could adversely affect our business and future operating results.
Item 1B. Unresolved Staff Comments

None.
Item 3. Legal Proceedings
We are involved in certain legal, regulatory, administrative and environmental proceedings before various courts, arbitration panels and governmental agencies concerning matters arising in the ordinary course of business. These proceedings include certain contract disputes, environmental reviews and investigations, audits, inquiries from various regulators, and pending judicial matters. We cannot predict the final disposition of such proceedings. We regularly review legal matters and record provisions for claims that are considered probable of loss. The resolution of pending proceedings is not expected to have a material effect on our operations or financial statements in the periods they are resolved.


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In February 2008, DTE Energy was named as one of approximately 24 defendant oil, power and coal companies in a lawsuit filed in a United States District Court. DTE Energy was served with process in March 2008. The plaintiffs, the Native Village of Kivalina and City of Kivalina, which are home to approximately 400 people in Alaska, claim that the defendants’defendants' business activities have contributed to global warming and, as a result, higher temperatures are damaging the local economy and leaving the island more vulnerable to storm activity in the fall and winter. As a result, the plaintiffs are seeking damages of up to $400 million for relocation costs associated with moving the village to a safer location, as well as unspecified attorney’sattorney's fees and expenses. On October 15, 2009, the U.S. District Court granted defendants’defendants' motions dismissing all of plaintiffs’plaintiffs' federal claims in the case on two independent grounds: (1) the court lacks subject matter jurisdiction to hear the claims because of the political question doctrine; and (2) plaintiffs lack standing to bring their claims. The court also dismissed plaintiffs’plaintiffs' state law claims because the court lacked supplemental jurisdiction over them after it dismissed the federal claims; the

13


dismissal of the state law claims was without prejudice. The plaintiffs have appealed to the U.S. Court of Appeals for the Ninth Circuit.

In July 2009, DTE Energy received a Notice of Violation/Finding of Violation (NOV/FOV)NOV/FOV from the EPA alleging, among other things, that five of Detroit Edison’sEdison's power plants violated New Source Performance standards, Prevention of Significant Deterioration requirements, and operating permit requirements under the Clean Air Act. In June 2010,the EPA issued a NOV/FOV making similar allegations related to a recent project and outage at Unit 2 of the Monroe Power Plant.
On
In August 5, 2010, the United States Department of Justice, at the request of the EPA, brought a civil suit in the U.S. District Court for the Eastern District of Michigan against DTE Energy and Detroit Edison, related to the June 2010 NOV/FOV and the outage work performed at Unit 2 of the Monroe Power Plant, but not relating to the July 2009 NOV/FOV. Among other relief, the EPA requested the court to require Detroit Edison to install and operate the best available control technology at Unit 2 of the Monroe Power Plant. Further, the EPA requested the court to issue a preliminary injunction to require Detroit Edison to (i) begin the process of obtaining the necessary permits for the Monroe Unit 2 modification and (ii) offset the pollution from Monroe Unit 2 through emissions reductions from Detroit Edison’sEdison's fleet of coal-fired power plants until the new control equipment is operating. In JanuaryOn August 23, 2011, the EPA’sU.S. District Court judge granted DTE Energy's motion for preliminary injunction was denied and the liability phase ofsummary judgment in the civil suit has been scheduledcase, dismissing the case and entering judgment in favor of DTE Energy and Detroit Edison. On October 20, 2011, the EPA caused to be filed a Notice of Appeal to the U.S. Court of Appeals for trial in May 2011.the Sixth Circuit.

DTE Energy and Detroit Edison believe that the plants identified by the EPA, including Unit 2 of the Monroe Power Plant, have complied with all applicable federal environmental regulations. Depending upon the outcome of discussions with the EPA regarding the NOV/FOV and the result of the civil action,two NOVs/FOVs, Detroit Edison could also be required to install additional pollution control equipment at some or all of the power plants in question, implement early retirement of facilities where control equipment is not economical, engage in supplemental environmental programs, and/or pay fines. DTE Energy and Detroit Edison cannot predict the financial impact or outcome of this matter,these matters, or the timing of its resolution.
For additional discussion on legal matters, see Notes 109 and 1615 of the Notes to Consolidated Financial Statements in Item 8 of this Report.

Item 4.Mine Safety Disclosures

Not applicable.
Part II
Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
All of the 138,632,324 issued and outstanding shares of common stock of Detroit Edison, par value $10 per share, are owned by DTE Energy, and constitute 100% of the voting securities of Detroit Edison. Therefore, no market exists for our common stock.
We paid cash dividends on our common stock of $305 million in 2011, 2010, 2009, and 2008.2009.
Item 6. Selected Financial Data
Omitted per General Instruction I (2) (a) of Form 10-K for wholly owned subsidiaries (reduced disclosure format).

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Item 7. Management’s Narrative Analysis of Results of Operations
The Management’s Narrative Analysis of Results of Operations discussion for Detroit Edison is presented in accordance with General Instruction I (2) (a) of Form 10-K for wholly-owned subsidiaries (reduced disclosure format).
             
(in Millions) 2010  2009  2008 
Operating Revenues $4,993  $4,714  $4,874 
Fuel and Purchased Power  1,580   1,491   1,778 
          
Gross Margin  3,413   3,223   3,096 
Operation and Maintenance  1,305   1,277   1,322 
Depreciation and Amortization  849   844   743 
Taxes Other Than Income  237   205   232 
Asset (Gains) Losses, Reserves and Impairments, Net  (6)  (2)  (1)
          
Operating Income  1,028   899   800 
Other (Income) and Deductions  317   295   283 
Income Tax Provision  270   228   186 
          
Net Income $441  $376  $331 
          

(in Millions)2011 2010 2009
Operating Revenues$5,152
 $4,993
 $4,714
Fuel and purchased power1,716
 1,580
 1,491
Gross margin3,436
 3,413
 3,223
Operation and maintenance1,369
 1,305
 1,277
Depreciation and amortization813
 849
 844
Taxes other than income240
 237
 205
Asset (gains) losses and reserves, net12
 (6) (2)
Operating Income1,002
 1,028
 899
Other (Income) and Deductions298
 317
 295
Income Tax Expense267
 270
 228
Net Income$437
 $441
 $376
Gross margin increased $23 million in 2011 and increased $190 million in 2010 and increased $127 million in 2009.2010. Revenues associated with certain tracking mechanisms and surcharges are offset by related expenses elsewhere in the Consolidated Statement of Operations. The following table details changes in various gross margin components relative to the comparable prior period:
         
(in Millions) 2010  2009 
Weather, net of RDM $84  $(66)
Energy optimization and renewable surcharge/regulatory offset  (10)  54 
Securitization bond and tax surcharge rate increase  40   62 
2010 rate order, surcharges and other  76   77 
       
Increase in gross margin $190  $127 
       
             
(in Thousands of MWh) 2010  2009  2008 
Electric Sales
            
Residential  15,726   14,625   15,492 
Commercial  16,570   18,200   18,920 
Industrial  10,195   9,922   13,086 
Other  3,210   3,229   3,218 
             
   45,701   45,976   50,716 
Interconnection sales (1)  4,876   5,156   3,583 
             
Total Electric Sales  50,577   51,132   54,299 
             
             
Electric Deliveries
            
Retail and Wholesale  45,701   45,976   50,716 
Electric Customer Choice, including self generators (2)  5,005   1,477   1,457 
             
Total Electric Sales and Deliveries  50,706   47,453   52,173 
             

(in Millions)2011 2010
Rate case and Choice Incentive mechanism, net of Revenue Decoupling mechanism and sales volume$29
 $84
Restoration tracker27
 35
Securitization bond and tax surcharge(39) 40
Low Income Energy Efficiency Fund revenue deferral(23) 
Energy optimization performance incentive17
 
Regulatory mechanisms and other12
 31
Increase in gross margin$23
 $190

(in Thousands of MWh)2011 2010 2009
Electric Sales     
Residential15,907
 15,726
 14,625
Commercial16,779
 16,570
 18,200
Industrial9,739
 10,195
 9,922
Other3,136
 3,210
 3,229
 45,561
 45,701
 45,976
Interconnection sales (1)3,512
 4,876
 5,156
Total Electric Sales49,073
 50,577
 51,132
      
Electric Deliveries     
Retail and Wholesale45,561
 45,701
 45,976
Electric Customer Choice, including self generators5,445
 5,005
 1,477
Total Electric Sales and Deliveries51,006
 50,706
 47,453

(1)Represents power that is not distributed by Detroit Edison
(2)Includes deliveries for self generators who have purchased power from alternative energy suppliers to supplement their power requirementsEdison.

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(in Thousands of MWh)2011 2010 2009
Power Generated and Purchased           
Power Plant Generation           
Fossil35,502
 68% 39,433
 73% 40,595
 74%
Nuclear8,910
 17
 7,738
 14
 7,406
 14
 44,412
 85
 47,171
 87
 48,001
 88
Purchased Power8,028
 15
 6,638
 13
 6,495
 12
System Output52,440
 100% 53,809
 100% 54,496
 100%
Less Line Loss and Internal Use(3,367)   (3,232)   (3,364)  
Net System Output49,073
   50,577
   51,132
  
Average Unit Cost ($/MWh)           
Generation (1)$22.67
   $18.94
   $18.20
  
Purchased Power$42.78
   $42.38
   $37.74
  
Overall Average Unit Cost$25.75
   $21.83
   $20.53
  

                         
(in Thousands of MWh) 2010  2009  2008 
Power Generated and Purchased
                        
Power Plant Generation                        
Fossil  39,433   73%  40,595   74%  41,254   71%
Nuclear  7,738   14   7,406   14   9,613   17 
                   
   47,171   87   48,001   88   50,867   88 
Purchased Power  6,638   13   6,495   12   6,877   12 
                   
System Output  53,809   100%  54,496   100%  57,744   100%
Less Line Loss and Internal Use  (3,232)      (3,364)      (3,445)    
                      
Net System Output  50,577       51,132       54,299     
                      
Average Unit Cost ($/MWh)
                        
Generation (1) $18.94      $18.20      $17.93     
                      
Purchased Power $42.38      $37.74      $69.50     
                      
Overall Average Unit Cost $21.83      $20.53      $24.07     
                      
(1)Represents fuel costs associated with power plants.

Operation and maintenanceexpense increased $64 million in 2011 and increased $28 million in 20102010. The increase in
2011 is primarily due to higher restoration and decreased $45line clearance expenses of $41 million, in 2009.higher generation
maintenance and outage expenses of $25 million, higher energy optimization and renewable energy expenses of $19 million,
higher employee benefit expense of $9 million, partially offset by reduced contributions of $23 million to the Low Income
Energy Efficiency Fund due to a court order, and reduced uncollectible expenses of $7 million. The increase in 2010 is
primarily due to higher restoration and line clearance expenses of $40 million, higher energy optimization and renewable
energy expenses of $18 million, higher legal expenses of $15 million, partially offset by reduced uncollectible expenses of $20
$20 million, lower generation expenses of $18 million and lower employee benefit-related expenses of $6 million. The decrease

Depreciation and amortization expense decreased $36 million in 2009 was2011 due primarily due to $71 million from continuous improvement initiatives and other cost reductions resulting in lower contract labor and outside services expense, information technology and other staff expenses, $14 millionreduced amortization of lower employee benefit-related expenses, lower restoration and line clearance expenses of $12 million, $9 million of reduced uncollectible expenses and $6 million of reduced maintenance activities,regulatory assets, partially offset by expense related to higher pension and health care costs of $54 million and $14 million of energy optimization and renewable energy expenses.
depreciable base. Depreciation and amortizationexpense increasedwas $5 million higher in 2010 and $101 million in 2009 due primarily to aexpense related to higher depreciable base and increased amortization of regulatory assets.
Taxes other than incomewere higher by $32 million in 2010 due primarily to a $30 million reduction in property tax expense in 2009 due to refunds received in settlement of appeals of assessments for prior years.
Asset (gains) and losses, reserves and impairments, net increased $18 million in 2011 principally attributable to an accrual of $19 million resulting from management's revisions of the timing and estimate of cash flows for the decommissioning of Fermi 1, partially offset by a revision of $6 million in the timing and estimate of cash flows for the Fermi 1 asbestos removal obligation and other items. See Note 7 of the Notes to the Consolidated Financial Statements.

Outlook  - The base rate and rehearing orders approved by the MPSC in fourth quarter 2011 provide for an annual revenue increase of $188 million and an authorized return on equity of 10.5%. The base rate order terminated Detroit Edison's Restoration, Line Clearance and Uncollectible Expense tracking mechanisms. Termination of these trackers may result in increased volatility in Detroit Edison's results due to weather, the number of storms and uncollectible accounts receivable. The Choice Incentive Mechanism was also terminated in the base rate order. Base rates included electric Customer Choice sales at the capped 10 percent level. See Note 9 of Notes to the Consolidated Financial Statements for further discussion of the rate orders received by Detroit Edison.

We continue to move forward in our efforts to improve the operating performanceachieve operational excellence, sustained strong cash flows and cash flow of Detroit Edison. The 2010 MPSC order provided for an uncollectible expense tracking mechanism which financially assists in mitigating the impacts of economic conditions inearn our service territory and a revenue decoupling mechanism that addresses changes in average customer usage due to general economic conditions, weather and conservation. These and other tracking mechanisms and surcharges are expected to result in lower earnings volatility.authorized return on equity. We expect that our planned significant environmental and renewable expenditures will result in earnings growth. Looking forward, we face additional challenges,factors may impact earnings such as higher levelsthe outcome of capital spending, volatility in prices for coal and other commodities, increased transportation costs,regulatory proceedings, investment returns and changes in discount rate assumptions in benefit plans and health care costs, lower levels of wholesale sales due to contract expirations, and uncertainty of legislative or regulatory actions regarding climate change. We expect to continue our continuous improvement efforts to improve productivity and decrease our costs while improving customer satisfaction with consideration of customer rate affordability.

16


13



Item 7A. Quantitative and Qualitative Disclosures about Market Risk
CommodityMarket Price Risk
We have commodity price risk arising from market price fluctuations. We have risks in conjunction with the anticipated purchases of coal, uranium, electricity, and base metals to meet our service obligations. However, we do not bear significant exposure to earnings risk as such changes are included in the PSCR regulatory rate-recovery mechanism. We are exposed to short-term cash flow or liquidity risk as a result of the time differential between actual cash settlements and regulatory rate recovery.
Credit Risk
Bankruptcies
We purchase and sell electricity from and to governmental entities and numerous companies operating in the steel, automotive, energy, retail and other industries. Certain of our customers have filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. We regularly review contingent matters relating to these customers and our purchase and sale contracts and we record provisions for amounts considered at risk of probable loss. We believe our accrued amounts are adequate for probable loss. The final resolution of these matters may have a material effect on our consolidated financial statements.
Other
We have aDetroit Edison had an uncollectible expense tracking mechanism that enabled it to mitigate a significant amount of losses related to uncollectible accounts receivable. This mechanism is subject to the jurisdictionrecover or refund 80 percent of the MPSCdifference between the actual uncollectible expense each year and is periodically reviewed.the level established in its last rate case. In October 2011, Detroit Edison's electric rate order terminated its uncollectible expense tracking mechanism. See Note 109 of the Notes to Consolidated Financial Statements in Item 8 of this Report.
We engage in business with customers that are non-investment grade. We closely monitor the credit ratings of these customers and, when deemed necessary, we request collateral or guarantees from such customers to secure their obligations.
Interest Rate Risk
Detroit Edison is subject to interest rate risk in connection with the issuance of debt securities. Our exposure to interest rate risk arises primarily from changes in U.S. Treasury rates, commercial paper rates and London Inter-Bank Offered Rates (LIBOR). We estimate that if interest rates were 10% higher or lower, the fair value of long-term debt at December 31, 20102011 would decrease $186$167 million and increase $202$179 million, respectively.

17



14


Item 8. Financial Statements and Supplementary Data

18



15


Controls and Procedures
(a) Evaluation of disclosure controls and procedures
Management of the Company carried out an evaluation, under the supervision and with the participation of Detroit Edison’s Chief Executive Officer (CEO) and Chief Financial Officer (CFO), of the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of December 31, 2010,2011, which is the end of the period covered by this report. Based on this evaluation, the Company’s CEO and CFO have concluded that such disclosure controls and procedures are effective in providing reasonable assurance that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act (i) is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and (ii) is accumulated and communicated to the Company’s management, including its CEO and CFO, as appropriate to allow timely decisions regarding required disclosure. Due to the inherent limitations in the effectiveness of any disclosure controls and procedures, management cannot provide absolute assurance that the objectives of its disclosure controls and procedures will be attained.
(b) Management’s report on internal control over financial reporting
Management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Internal control over financial reporting is a process designed by, or under the supervision of, our CEO and CFO, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
Management of the Company has assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2010.2011. In making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) inInternal Control—Integrated Framework.Based on this assessment, management concluded that, as of December 31, 2010,2011, the Company’s internal control over financial reporting was effective based on those criteria.
This annual report does not include an audit report of the Company’s independent registered public accounting firm regarding internal control over financial reporting. Management’s report was not subject to audit by the Company’s independent registered public accounting firm pursuant to rules of the Securities and Exchange Commission that permit the Company to provide only management’s report in this annual report.
(c) Changes in internal control over financial reporting
There have been no changes in the Company’s internal control over financial reporting during the quarter ended December 31, 20102011 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

19



16



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


To the Board of Directors and Shareholder of The Detroit Edison Company:


In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of The Detroit Edison Company and its subsidiaries at December 31, 20102011 and 2009,2010, and the results of their operations and their cash flows for each of the three years thenin the period ended December 31, 2011 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule for the years ended December 31, 2010 and 2009 listed in the accompanying indexpresents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. These financial statements and financial statement schedule are the responsibility of the Company’sCompany's management. Our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.


/s/ PricewaterhouseCoopers LLP


Detroit, Michigan
February 18, 201116, 2012

20




REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM17

To the Board

We have audited the consolidated statements of operations, cash flows, and changes in shareholder’s equity and comprehensive income of The Detroit Edison Company and subsidiaries (the “Company”) for the year ended December 31, 2008. Our audit also included the 2008 information in the financial statement schedule listed in accompanying index. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on the financial statements and financial statement schedule based on our audit.
We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.
In our opinion, such consolidated financial statements present fairly, in all material respects, the results of operations and cash flows of The Detroit Edison Company and subsidiaries for the year ended December 31, 2008, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, such 2008 financial statement schedule, when considered in relation to the basic consolidated financial statements of the Company taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP

Detroit, Michigan
February 27, 2009

21


The Detroit Edison Company
Consolidated Statements of Operations
             
  Year Ended December 31 
(in Millions) 2010  2009  2008 
Operating Revenues
 $4,993  $4,714  $4,874 
          
             
Operating Expenses
            
Fuel and purchased power  1,580   1,491   1,778 
Operation and maintenance  1,305   1,277   1,322 
Depreciation and amortization  849   844   743 
Taxes other than income  237   205   232 
Asset (gains) losses and reserves, net  (6)  (2)  (1)
          
   3,965   3,815   4,074 
          
             
Operating Income
  1,028   899   800 
          
             
Other (Income) and Deductions
            
Interest expense  313   325   293 
Interest income  (1)  (2)  (6)
Other income  (39)  (39)  (51)
Other expenses  44   11   47 
          
   317   295   283 
          
             
Income Before Income Taxes
  711   604   517 
             
Income Tax Provision
  270   228   186 
          
             
Net Income
 $441  $376  $331 
          

 Year Ended December 31
(in Millions)2011 2010 2009
Operating Revenues$5,152
 $4,993
 $4,714
Operating Expenses     
Fuel and purchased power1,716
 1,580
 1,491
Operation and maintenance1,369
 1,305
 1,277
Depreciation and amortization813
 849
 844
Taxes other than income240
 237
 205
Asset (gains) losses and reserves, net12
 (6) (2)
 4,150
 3,965
 3,815
Operating Income1,002
 1,028
 899
Other (Income) and Deductions     
Interest expense289
 313
 325
Interest income
 (1) (2)
Other income(47) (39) (39)
Other expenses56
 44
 11
 298
 317
 295
Income Before Income Taxes704
 711
 604
Income Tax Expense267
 270
 228
Net Income$437
 $441
 $376
See Notes to Consolidated Financial Statements

22




18


The Detroit Edison Company
Consolidated Statements of Cash Flows
             
  Year Ended December 31 
(in Millions) 2010  2009  2008 
Operating Activities
            
Net income $441  $376  $331 
Adjustments to reconcile net income to net cash from operating activities:            
Depreciation and amortization  849   844   743 
Deferred income taxes  322   15   91 
Asset (gains) losses and reserves, net  (6)  (2)  (2)
Changes in assets and liabilities, exclusive of changes shown separately (Note 18)  (253)  (39)  118 
          
Net cash from operating activities  1,353   1,194   1,281 
          
             
Investing Activities
            
Plant and equipment expenditures  (864)  (793)  (943)
Restricted cash  (25)  5   50 
Notes receivable from affiliate  (21)  (42)  (41)
Proceeds from sale of nuclear decommissioning trust fund assets  377   295   232 
Investment in nuclear decommissioning trust funds  (410)  (315)  (255)
Other investments  (60)  (46)  (54)
          
Net cash used for investing activities  (1,003)  (896)  (1,011)
          
             
Financing Activities
            
Issuance of long-term debt  614   129   862 
Redemption of long-term debt  (652)  (278)  (166)
Repurchase of long-term debt        (238)
Short-term borrowings, net     (75)  (331)
Short-term borrowings from affiliate        (277)
Capital contribution by parent company     250   175 
Dividends on common stock  (305)  (305)  (305)
Other  (11)  (15)  (7)
          
Net cash used for financing activities  (354)  (294)  (287)
          
             
Net Increase (Decrease) in Cash and Cash Equivalents
  (4)  4   (17)
Cash and Cash Equivalents at Beginning of the Period
  34   30   47 
          
Cash and Cash Equivalents at End of the Period
 $30  $34  $30 
          

 Year Ended December 31
(in Millions)2011 2010 2009
Operating Activities     
Net income$437
 $441
 $376
Adjustments to reconcile net income to net cash from operating activities:     
Depreciation and amortization813
 849
 844
Deferred income taxes231
 322
 15
Asset (gains) losses and reserves, net13
 (6) (2)
Changes in assets and liabilities, exclusive of changes shown separately (Note 17)(141) (253) (39)
Net cash from operating activities1,353
 1,353
 1,194
Investing Activities     
Plant and equipment expenditures(1,202) (864) (793)
Restricted cash for debt redemption(3) (25) 5
Notes receivable from affiliate77
 (21) (42)
Proceeds from sale of nuclear decommissioning trust fund assets80
 377
 295
Investment in nuclear decommissioning trust funds(97) (410) (315)
Other investments(32) (60) (46)
Net cash used for investing activities(1,177) (1,003) (896)
Financing Activities     
Issuance of long-term debt609
 614
 129
Redemption of long-term debt(554) (652) (278)
Short-term borrowings, net
 
 (75)
Short-term borrowings from affiliate64
 
 
Capital contribution by parent company
 
 250
Dividends on common stock(305) (305) (305)
Other(7) (11) (15)
Net cash used for financing activities(193) (354) (294)
Net Increase (Decrease) in Cash and Cash Equivalents(17) (4) 4
Cash and Cash Equivalents at Beginning of the Period30
 34
 30
Cash and Cash Equivalents at End of the Period$13
 $30
 $34
See Notes to Consolidated Financial Statements

23




19


The Detroit Edison Company
Consolidated Statements of Financial Position
         
  December 31 
(in Millions) 2010  2009 
ASSETS
        
Current Assets
        
Cash and cash equivalents $30  $34 
Restricted cash (Note 2)  104   79 
Accounts receivable (less allowance for doubtful accounts of $93 and $118, respectively)        
Customer  690   696 
Affiliates  8   3 
Other  204   108 
Inventories        
Fuel  224   135 
Materials and supplies  170   173 
Notes receivable        
Affiliates  97   65 
Other     3 
Other  109   79 
       
   1,636   1,375 
       
         
Investments
        
Nuclear decommissioning trust funds  939   817 
Other  118   104 
       
   1,057   921 
       
         
Property
        
Property, plant and equipment  16,068   15,451 
Less accumulated depreciation and amortization  (6,418)  (6,133)
       
   9,650   9,318 
       
         
Other Assets
        
Regulatory assets  3,277   3,333 
Securitized regulatory assets  729   870 
Intangible assets  25   9 
Notes receivable — affiliates  6   17 
Other  142   118 
       
   4,179   4,347 
       
         
Total Assets
 $16,522  $15,961 
       

 December 31
(in Millions)2011 2010
ASSETS   
Current Assets   
Cash and cash equivalents$13
 $30
Restricted cash, principally Securitization127
 104
Accounts receivable (less allowance for doubtful accounts of $80 and $93, respectively)   
Customer709
 690
Affiliates61
 8
Other76
 204
Inventories   
Fuel264
 224
Materials and supplies183
 170
Notes receivable   
Affiliates26
 97
Other2
 
Regulatory assets272
 58
Other63
 51
 1,796
 1,636
Investments   
Nuclear decommissioning trust funds937
 939
Other121
 118
 1,058
 1,057
Property   
Property, plant and equipment16,788
 16,068
Less accumulated depreciation and amortization(6,526) (6,418)
 10,262
 9,650
Other Assets   
Regulatory assets3,618
 3,277
Securitized regulatory assets577
 729
Intangible assets36
 25
Notes receivable   
Affiliates
 6
Other4
 
Other142
 142
 4,377
 4,179
Total Assets$17,493
 $16,522
See Notes to Consolidated Financial Statements

24



20



The Detroit Edison Company
Consolidated Statements of Financial Position
         
  December 31 
(in Millions, Except Shares) 2010  2009 
LIABILITIES AND SHAREHOLDER’S EQUITY
        
Current Liabilities
        
Accounts payable        
Affiliates $50  $74 
Other  349   251 
Accrued interest  81   83 
Current portion long-term debt, including capital leases  308   660 
Regulatory liabilities  60   27 
Other  279   234 
       
   1,127   1,329 
 ��     
         
Long-Term Debt (net of current portion)
        
Mortgage bonds, notes and other  4,046   3,579 
Securitization bonds  643   793 
Capital lease obligations  20   25 
       
   4,709   4,397 
       
         
Other Liabilities
        
Deferred income taxes  2,235   1,871 
Regulatory liabilities  714   711 
Asset retirement obligations  1,354   1,285 
Unamortized investment tax credit  67   75 
Nuclear decommissioning  149   136 
Accrued pension liabilityaffiliates
  960   987 
Accrued postretirement liabilityaffiliates
  1,060   1,058 
Other  138   239 
       
   6,677   6,362 
       
         
Commitments and Contingencies (Notes 10 and 16)
        
         
Shareholder’s Equity
        
Common stock, $10 par value, 400,000,000 shares authorized, and 138,632,324 shares issued and outstanding  3,196   3,196 
Retained earnings  829   693 
Accumulated other comprehensive income (loss)  (16)  (16)
       
   4,009   3,873 
       
         
Total Liabilities and Shareholder’s Equity
 $16,522  $15,961 
       

 December 31
(in Millions, Except Shares)2011 2010
LIABILITIES AND SHAREHOLDER’S EQUITY   
Current Liabilities   
Accounts payable   
Affiliates$67
 $50
Other421
 349
Accrued interest69
 81
Current portion long-term debt, including capital leases470
 308
Regulatory liabilities27
 60
Short-term borrowing - affiliates64
 
Other283
 279
 1,401
 1,127
Long-Term Debt (net of current portion)   
Mortgage bonds, notes and other4,105
 4,046
Securitization bonds479
 643
Capital lease obligations9
 20
 4,593
 4,709
Other Liabilities   
Deferred income taxes2,701
 2,235
Regulatory liabilities454
 714
Asset retirement obligations1,440
 1,354
Unamortized investment tax credit57
 67
Nuclear decommissioning148
 149
Accrued pension liability  affiliates
1,231
 960
Accrued postretirement liability  affiliates
1,217
 1,060
Other115
 138
 7,363
 6,677
    
Commitments and Contingencies (Notes 9 and 15)   
    
Shareholder’s Equity   
Common stock, $10 par value, 400,000,000 shares authorized, and 138,632,324 shares issued and outstanding3,196
 3,196
Retained earnings960
 829
Accumulated other comprehensive income (loss)(20) (16)
 4,136
 4,009
Total Liabilities and Shareholder’s Equity$17,493
 $16,522
See Notes to Consolidated Financial Statements

25




21


The Detroit Edison Company
Consolidated Statements of Changes in Shareholder’s Equity and Comprehensive income
                         
                  Accumulated  
          Additional     Other  
  Common Stock Paid in Retained Comprehensive  
(Dollars in Millions, Shares in Thousands) Shares Amount Capital Earnings Income (Loss) Total
Balance, December 31, 2007  138,632  $1,386  $1,385  $528  $4  $3,303 
 
Net income           331      331 
Implementation of ASC 715 (SFAS No. 158) measurement date provision, net of tax           (9)     (9)
Dividends declared on common stock           (228)     (228)
Net change in unrealized gains on investments, net of tax              (2)  (2)
Benefit obligations, net of tax              (14)  (14)
Capital contribution by parent company        175         175 
 
Balance, December 31, 2008  138,632   1,386   1,560   622   (12)  3,556 
 
Net income           376      376 
Dividends declared on common stock           (305)     (305)
Net change in unrealized gains on investments, net of tax              (2)  (2)
Benefit obligations, net of tax              (2)  (2)
Capital contribution by parent company        250         250 
 
Balance, December 31, 2009  138,632   1,386   1,810   693   (16)  3,873 
 
Net income           441      441 
Dividends declared on common stock           (305)     (305)
 
Balance, December 31, 2010
  138,632  $1,386  $1,810  $829  $(16) $4,009 
 

      Additional   
Accumulated
Other
  
  Common Stock Paid-in Retained Comprehensive  
(Dollars in Millions, Shares in Thousands) Shares Amount Capital Earnings Income (Loss) Total
Balance, December 31, 2008 138,632
 $1,386
 $1,560
 $622
 $(12) $3,556
Net income 
 
 
 376
 
 376
Dividends declared on common stock 
 
 
 (305) 
 (305)
Net change in unrealized gains on investments, net of tax 
 
 
 
 (2) (2)
Benefit obligations, net of tax 
 
 
 
 (2) (2)
Capital contribution by parent company 
 
 250
 
 
 250
Balance, December 31, 2009 138,632
 1,386
 1,810
 693
 (16) 3,873
Net income 
 
 
 441
 
 441
Dividends declared on common stock 
 
 
 (305) 
 (305)
Balance, December 31, 2010 138,632
 1,386
 1,810
 829
 (16) 4,009
Net income 
 
 
 437
 
 437
Dividends declared on common stock 
 
 
 (306) 
 (306)
Benefit obligations, net of tax   
 
 
 (4) (4)
Balance, December 31, 2011 138,632
 $1,386
 $1,810
 $960
 $(20) $4,136

The following table displays comprehensive income:
             
(in Millions) 2010  2009  2008 
Net income $441  $376  $331 
          
Other comprehensive income:            
Net change in unrealized gain (losses) on investments, net of tax of $, $(1) and $(1)
     (2)  (2)
Benefit obligations, net of tax of $, $(1) and $(7)
     (2)  (14)
          
Comprehensive income $441  $372  $315 
          

(in Millions) 2011 2010 2009
Net income $437
 $441
 $376
Other comprehensive income:      
Net change in unrealized gains (losses) on investments, net of tax of $, $— and $(1)
 
 
 (2)
Benefit obligations, net of tax of $(2), $— and $(1) (4) 
 (2)
Comprehensive income $433
 $441
 $372
See Notes to Consolidated Financial Statements

26




22


The Detroit Edison Company
Notes to Consolidated Financial Statements
NOTE 1 — BASIS OF PRESENTATION
Corporate Structure
Detroit Edison is an electric utility engaged in the generation, purchase, distribution and sale of electricity to approximately 2.1 million customers in southeastsoutheastern Michigan. Detroit Edison is regulated by the MPSC and the FERC. In addition, we are regulated by other federal and state regulatory agencies including the NRC, the EPA and the MDNRE.MDEQ.
References in this report to “we,” “us,” “our” or “Company” are to Detroit Edison and its subsidiaries, collectively.
Basis of Presentation
The accompanying Consolidated Financial Statements are prepared using accounting principles generally accepted in the United States of America. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from the Company’s estimates.
Certain prior year balances were reclassified to match the current year’s financial statement presentation.
Principles of ConsolidationVariable Interest Entity (VIE)
The Company consolidates all majority owned subsidiaries and investments in entities in which it has controlling influence. Non-majority owned investments are accounted for using the equity method when the Company is able to influence the operating policies of the investee. Non-majority owned investments include investments in limited liability companies, partnerships or joint ventures. When the Company does not influence the operating policies of an investee, the cost method is used. These consolidated financial statements also reflect the Company’s proportionate interests in certain jointly owned utility plant. The Company eliminates all intercompany balances and transactions.
Effective January 1, 2010, the Company adopted the provisions of ASU 2009-17,Amendments to FASB Interpretation 46(R). ASU 2009-17 changed the methodology for determining the primary beneficiary of a VIEvariable interest entity (VIE) from a quantitative risk and rewards-based model to a qualitative determination. There is no grandfathering of previous consolidation conclusions. As a result, the Company re-evaluated all prior VIE and primary beneficiary determinations. The requirements of ASU 2009-17 were adopted on a prospective basis.
The Company evaluates whether an entity is a VIE whenever reconsideration events occur. The Company consolidates VIEs for which it is the primary beneficiary. If the Company is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, the Company considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. The Company performs ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed.
The Company has variable interests in VIEs through certain of its long-term purchase contracts. As of December 31, 2010,2011, the carrying amount of assets and liabilities in the Consolidated Statement of Financial Position that relate to its variable interests under long-term purchase contracts are predominately related to working capital accounts and generally represent the amounts owed by the Company for the deliveries associated with the current billing cycle under the contracts. The Company has not provided any form of financial support associated with these long-term contracts. There is no significant potential exposure to loss as a result of its variable interests through these long-term purchase contracts.
In 2001, Detroit Edison financed a regulatory asset related to Fermi 2 and certain other regulatory assets through the sale of rate reduction bonds by a wholly-owned special purpose entity, Securitization. Detroit Edison performs

27


servicing activities including billing and collecting surcharge revenue for Securitization. Under ASU 2009-17, thisThis entity is now a VIE, and continues to beis consolidated asby the Company is the primary beneficiary.Company. The maximum risk exposure related to Securitization is reflected on the Company’s Consolidated Statements of Financial Position.
The following table summarizes the major balance sheet items at December 31, 2011 and December 31, 2010 restricted for Securitization that are either (1) assets that can be used only to settle their obligations or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary.
     
  December 31, 
(in Millions) 2010 
ASSETS
    
Restricted cash $104 
Accounts receivable  42 
Securitized regulatory assets  729 
Other assets  13 
    
  $888 
    
     
LIABILITIES
    
Accounts payable and accrued current liabilities $17 
Other current liabilities  62 
Current portion long-term debt, including capital leases  150 
Securitization bonds  643 
Other long term liabilities  6 
    
  $878 
    


23


 December 31,December 31,
(in Millions)20112010
ASSETS  
Restricted cash$107
$104
Accounts receivable34
42
Securitized regulatory assets577
729
Other assets10
13
 $728
$888
   
LIABILITIES  
Accounts payable and accrued current liabilities$14
$17
Other current liabilities55
62
Current portion long-term debt, including capital leases164
150
Securitization bonds479
643
Other long term liabilities7
6
 $719
$878

As of December 31, 2011 and December 31, 2010, Detroit Edison had $4 million and $6 million in Notes receivable, and at December 31, 2009, had a bank loan guarantee of $11 millionrespectively, related to non-consolidated VIEs.
NOTE 2 — SIGNIFICANT ACCOUNTING POLICIES
Revenues
Revenues from the sale and delivery of electricity are recognized as services are provided. The Company records revenues for electricelectricity provided but unbilled at the end of each month. Rates for Detroit Edison include provisions to adjust billings for fluctuations in fuel and purchased power costs and certain other costs. Revenues are adjusted for differences between actual costs and the amounts billed in current rates. Under or over recovered revenues related to these cost trackingrecovery mechanisms are recorded on the Consolidated Statement of Financial Position and are recovered or returned to customers through adjustments to the billing factors. See Note 10 for further discussion of cost recovery mechanisms.

Detroit Edison hashad a CIM, which iswas an over/under recovery mechanism that measuresmeasured non-fuel revenues lost or gained as a result of fluctuations in electric Customer Choice sales. If annual electric Customer Choice sales exceedexceeded the baseline amount from Detroit Edison’sEdison's most recent rate case, 90 percent of its lost non-fuel revenues associated with sales above that level may be recovered from full-servicefull service customers. If annual electric Customer Choice sales decreasedecreased below the baseline, the Company must refund 90 percent of its increase in non-fuel revenues associated with sales below that level to full service customers. The CIM was terminated effective with the October 20, 2011 MPSC rate order. On January 17, 2012, Detroit Edison filed an application with the MPSC for approval of its CIM reconciliation for 2011.
Detroit Edison hashad an RDM that isin place in 2011, designed to minimize the impact on revenues of changes in average customer usage of electricity. The January 2010 MPSC order in Detroit Edison’s 2009 rate case provided for, among other items, the implementation of a pilot RDM effective February 1, 2010. The RDM enablesenabled Detroit Edison to recover or refund the change in revenue resulting from the difference between actual average sales per customer compared to the base level of average sales per customer established in the MPSC order. The RDM addresses changes in customer usage due to general economic conditions and conservation, but does not shield Detroit Edison from the impacts of lost customers. In addition, the2011 pilot RDM materially shieldsestablished in Detroit Edison from the impact of weather on customer usage. The RDM is subject to reviewEdison's 2009 rate case was terminated by the MPSC afterin October 2011, but the initial one-year pilot program.Company has requested rehearing on this point asserting the termination should have occurred in April 2011. Detroit Edison will have a newly designed RDM that will be effective in April 2012. See Note 9 for further discussion of the newly designed RDM.
See Note 9 for further discussion of recovery mechanisms authorized by the MPSC.
Accounting for ISO Transactions
Detroit Edison participates in the energy market through MISO. MISO requires that we submit hourly day-ahead, real time and FTR bids and offers for energy at locations across the MISO region. Detroit Edison accounts for MISO

28


transactions on a net hourly basis in each of the day-ahead, real-time and FTR markets and net transactions across all MISO energy market locations. In any single hour Detroit Edison records net purchases in Fuel, and purchased power and gas and net sales in Operating revenues on the Consolidated Statements of Operations. Detroit Edison records net sale billing adjustments when invoices are received. Detroit Edison records expense accruals for future net purchases adjustments based on historical experience, and

24


reconciles accruals to actual expenses when invoices are received from MISO.
Comprehensive Income
Comprehensive income is the change in Commoncommon shareholder’s equity during a period from transactions and events from non-owner sources, including net income. AmountsAs shown in the following table, amounts recorded to Otheraccumulated other comprehensive loss for the year ended December 31, 2010 included immaterial amounts for2011 reflected changes in benefit obligations and unrealized gains and losses on available for sale securities.obligations.
             
          Accumulated 
          Other 
  Benefit      Comprehensive 
(in Millions) Obligations  Other  Loss 
Beginning balances $(16) $  $(16)
Current period change         
          
Ending balance $(16) $  $(16)
          

 Benefit  
Accumulated
Other
Comprehensive
(in Millions)Obligations  Loss
Beginning balance$(16)  $(16)
Current period change(4)  (4)
Ending balance$(20)  $(20)
Cash Equivalents and Restricted Cash
Cash and cash equivalents include cash on hand, cash in banks and temporary investments purchased with remaining maturities of three months or less. Restricted cash consists of funds held to satisfy requirements of certain debt agreements, related to Securitization bonds. Restricted cash designated for interest and principal payments within one year is classified as a current asset.
Receivables
Accounts receivable are primarily composed of trade receivables and unbilled revenue. Our accounts receivable are stated at net realizable value.
The allowance for doubtful accounts is generally calculated using the aging approach that utilizes rates developed in reserve studies. Detroit Edison establishes an allowance for uncollectible accounts based on historical losses and management’s assessment of existing economic conditions, customer trends, and other factors. Customer accounts are generally considered delinquent if the amount billed is not received by the due date, which is typically in 21 days, however, factors such as assistance programs may delay aggressive action. We assess late payment fees on trade receivables based on past-due terms with customers. Customer accounts are written off when collection efforts have been exhausted, generally one year after service has been terminated.
Unbilled revenues of $236$264 million and $269$236 million are included in customer accounts receivable at December 31, 20102011 and 2009,2010, respectively.
Notes Receivable
Notes receivable, or financing receivables, are primarily comprised of capital lease receivables and loans and are included in Notes receivable and Other current assets and Notes receivable on the Company’s Consolidated Statements of Financial Position.
Notes receivable are typically considered delinquent when payment is not received for periods ranging from 60 to 120 days. The Company ceases accruing interest (nonaccrual status), considers a note receivable impaired, and establishes an allowance for credit loss when it is probable that all principal and interest amounts due will not be collected in accordance with the contractual terms of the note receivable. Cash payments received on nonaccrual status notes receivable, that do not bring the account contractually current, are first applied to contractually owed past due interest, with any remainder applied to principle.principal. Accrual of interest is generally resumed when the note receivable becomes contractually current.

29


In determining the allowance for credit losses for notes receivable, we consider the historical payment experience and other factors that are expected to have a specific impact on the counterparty’s ability to pay. In addition, the Company monitors the credit ratings of the counterparties from which we have notes receivable.
Inventories
The Company generally values inventory at average cost.
Property, Retirement and Maintenance, and Depreciation, Depletion and Amortization
Property is stated at cost and includes construction-related labor, materials, overheads and an allowance for funds used during construction (AFUDC). The cost of properties retired, including the cost of removal, less salvage value is charged to

25


accumulated depreciation. Expenditures for maintenance and repairs are charged to expense when incurred, except for Fermi 2.
The Company bases depreciation provisions for utilityUtility property onis depreciated over its estimated useful life using straight-line rates approved by the MPSC.
The Company credits depreciation and amortization expense when we establishit establishes regulatory assets for plant-related costs such as depreciation or plant-related financing costs. The Company charges depreciation and amortization expense when we amortize these regulatory assets. The Company credits interest expense to reflect the accretion income on certain regulatory assets.
Approximately $3$23 million and $13$3 million of expenses related to Fermi 2 refueling outages were accrued at December 31, 20102011 and December 31, 2009,2010, respectively. Amounts are accrued on a pro-rata basis over an 18-month period that coincides with scheduled refueling outages at Fermi 2. This accrual of outage costs matches the regulatory recovery of these costs in rates set by the MPSC.
See Note 6.5.
The cost of nuclear fuel is capitalized. The amortization of nuclear fuel is included within Fuel and purchased power in the Consolidated Statement of Operations and is recorded using the units-of-production method.
Long-Lived Assets
Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. If the carrying amount of the asset exceeds the expected future cash flows generated by the asset, an impairment loss is recognized resulting in the asset being written down to its estimated fair value. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell.
Intangible Assets
The Company has certain intangible assets relating to emission allowances and renewable energy credits. Emission allowances and renewable energy credits are charged to expense, using average cost, as the allowances and credits are consumed in the operation of the business. The Company’s intangible assets related to emission allowances were $9 million at December 31, 20102011 and 2009.2010. The Company’s intangible assets related to renewable energy credits were $27 million and $17 million at December 31, 2010. The Company had no renewable energy credits at2011 and December 31, 2009.2010, respectively.
Excise and Sales Taxes
The Company records the billing of excise and sales taxes as a receivable with an offsetting payable to the applicable taxing authority, with no net impact on the Consolidated Statements of Operations.
Deferred Debt Costs
The costs related to the issuance of long-term debt are deferred and amortized over the life of each debt issue. In accordance with MPSC regulations, the unamortized discount, premium and expense related to debt redeemed with a refinancing are amortized over the life of the replacement issue.
Investments in Debt and Equity Securities
The Company generally classifies investments in debt and equity securities as either trading or available-for-sale and has recorded such investments at market value with unrealized gains or losses included in earnings or in other

30


comprehensive income or loss, respectively. Changes in the fair value of Fermi 2 nuclear decommissioning investments are recorded as adjustments to regulatory assets or liabilities, due to a recovery mechanism from customers. The Company’s equity investments are reviewed for impairment each reporting period. If the assessment indicates that the impairment is other than temporary, a loss is recognized resulting in the equity investment being written down to its estimated fair value. See Note 4.3.
Stock-Based Compensation
The Company received an allocation of costs from DTE Energy associated with stock-based compensation. Our allocation for 2011, 2010 2009 and 20082009 for stock-based compensation expense was approximately $30 million, $23 million $24 million and $15$24 million, respectively.
Government Grants
Grants are recognized when there is reasonable assurance that the grant will be received and that any conditions associated with the grant will be met. When grants are received related to Property, Plant and Equipment, the Company reduces the basis of the assets on the Consolidated Statements of Financial Position, resulting in lower depreciation expense over the life of the associated asset. Grants received related to expenses are reflected as a reduction of the associated expense in the period in which the expense is incurred.

26


Other Accounting Policies
See the following notes for other accounting policies impacting our financial statements:
Note Title
3New Accounting Pronouncements
4
 Fair Value
45
 Financial and Other Derivative Instruments
710
 Asset Retirement Obligations
9
 Regulatory Matters
1011
 Income Taxes
1617
 Retirement Benefits and Trusteed Assets
NOTE 3 — NEW ACCOUNTING PRONOUNCEMENTS
Variable Interest Entity
In June 2009, the FASB issued ASU 2009-17,Amendments to FASB Interpretation 46(R).This standard amends the consolidation guidance that applies to VIEs and affects the overall consolidation analysis under ASC 810-10,Consolidation. The amendments to the consolidation guidance affect all entities and enterprises currently within the scope of ASC 810-10, as well as qualifying special purpose entities that are currently outside the scope of ASC 810-10. Accordingly, the Company reconsidered its previous ASC 810-10 conclusions, including (1) whether an entity is a VIE, (2) whether the enterprise is the VIE’s primary beneficiary, and (3) what type of financial statement disclosures are required. ASU 2009-17 is effective as of the beginning of the first fiscal year that begins after November 15, 2009. The Company adopted the standard as of January 1, 2010. See Note 1.
Fair Value Measurements and Disclosures
In January 2010, the FASB issued ASU 2010-06,Improving Disclosures about Fair Value Measurements. ASU 2010-06 requires details of transfers in and out of Level 1 and 2 fair value measurements and the gross presentation of activity within the Level 3 fair value measurement roll forward. The new disclosures are required of all entities that are required to provide disclosures about recurring and nonrecurring fair value measurements. The Company adopted ASU 2010-06 effective January 1, 2010, except for the gross presentation of the Level 3 fair value measurement roll forward which is effective for annual reporting periods beginning after December 15, 2010 and for interim reporting periods within those years.
NOTE 4 — FAIR VALUE
Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that

31


market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated or generally unobservable inputs. The Company makes certain assumptions it believes that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. Credit risk of the Company and its counterparties is incorporated in the valuation of assets and liabilities through the use of credit reserves, the impact of which was immaterial at December 31, 20102011 and December 31, 2009.2010. The Company believes it uses valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs.
A fair value hierarchy has been established, whichthat prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability, and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The Company classifies fair value balances based on the fair value hierarchy defined as follows:
Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access as of the reporting date.
Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.
Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Company has the ability to access as of the reporting date.
Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.
Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
The following table presents assets measured and recorded at fair value on a recurring basis as of December 31, 2011:

       Net Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2011
Assets:       
Nuclear decommissioning trusts$577
 $360
 $
 $937
Other investments55
 54
 
 109
Derivative assets — FTRs
 
 1
 1
Total$632
 $414
 $1
 $1,047


27


       Net Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2011
Assets:       
Current$
 $
 $1
 $1
Noncurrent(1)632
 414
 
 1,046
Total Assets$632
 $414
 $1
 $1,047

The following table presents assets and liabilities measured and recorded at fair value on a recurring basis as of December 31, 2010:
       Net Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2010
Assets:       
Nuclear decommissioning trusts$599
 $340
 $
 $939
Other investments52
 55
 
 107
Derivative assets — FTRs
 
 2
 2
Total$651
 $395
 $2
 $1,048
Liabilities:       
Derivative liabilities — Emissions
 (3) 
 (3)
Total$
 $(3) $
 $(3)
Net Assets at December 31, 2010$651
 $392
 $2
 $1,045
                 
              Net Balance at 
(in Millions) Level 1  Level 2  Level 3  December 31, 2010 
Assets:
                
Current $  $  $2  $2 
Noncurrent(1)  651   395      1,046 
             
Total Assets $651  $395  $2  $1,048 
             
Liabilities:
                
Current $  $(3) $  $(3)
Noncurrent            
             
Total Liabilities $  $(3) $  $(3)
             
                 
Net Assets at December 31, 2010 $651  $392  $2  $1,045 
             
       Net Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2010
Assets:       
Current$
 $
 $2
 $2
Noncurrent(1)651
 395
 
 1,046
Total Assets$651
 $395
 $2
 $1,048
Liabilities:       
Current$
 $(3) $
 $(3)
Total Liabilities$
 $(3) $
 $(3)
Net Assets at December 31, 2010$651
 $392
 $2
 $1,045

32


The following table presents assets and liabilities measured and recorded at fair value on a recurring basis as of December 31, 2009:
                 
              Net Balance at 
(in Millions) Level 1  Level 2  Level 3  December 31, 2009 
Assets:
                
Cash equivalents $15  $  $  $15 
Nuclear decommissioning trusts  549   268      817 
Other investments  40   57      97 
Derivative assets        2   2 
             
Total $604  $325  $2  $931 
             
Liabilities:
                
Derivative liabilities     (8)     (8)
             
Total $  $(8) $  $(8)
             
                 
Net Assets at December 31, 2009 $604  $317  $2  $923 
             
(1)Includes $109 and $107 million of other investments that are included in the Consolidated Statements of Financial Position in Other Investments at December 31, 2010.2011 and December 31, 2010, respectively.

28


The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for the years ended December 31, 20102011 and 2009:2010:
         
  Year Ended 
  December 31 
(in Millions) 2010  2009 
Asset balance as of January 1 $2   4 
Change in fair value recorded in regulatory assets/liabilities  6    
Purchases, issuances and settlements  (6)   
Transfers in/out of Level 3     (2)
       
Asset balance as of December 31 $2  $2 
       
The amount of total gains (losses) included in regulatory assets and liabilities attributed to the change in unrealized gains (losses) related to regulatory assets and liabilities held at December 31, 2010 and 2009 $2  $2 
       

 
Year Ended
December 31
(in Millions)2011 2010
Net Assets as of January 1$2
 2
Change in fair value recorded in regulatory assets/liabilities2
 6
Purchases, issuances and settlements:   
Settlements(3) (6)
Net Assets as of December 31$1
 $2
The amount of total gains (losses) included in regulatory assets and liabilities attributed to the change in unrealized gains (losses) related to regulatory assets and liabilities held at December 31, 2011 and 2010$1
 $2

Transfers in/in and transfers out of Level 3 represent existing assets or liabilities that were either previously categorized as a higher level and for which the inputs to the model became unobservable or assets and liabilities that were previously classified as Level 3 for which the lowest significant input became observable during the period. Transfers in/in and transfers out of Level 3 are reflected as if they had occurred at the beginning of the period. No significant transfers between Levels 1, 2 or 3 occurred in the yearyears ended December 31, 2011 and December 31, 2010. Transfers out of Level 3 in 2009 reflect increased reliance on broker quotes for certain transactions.
Cash Equivalents
Cash equivalents include investments with maturities of three months or less when purchased. The cash equivalents shown in the fair value table are comprised of investments in money market funds. The fair values of the shares of these funds are based on observable market prices and, therefore, have been categorized as Level 1 in the fair value hierarchy.
Nuclear Decommissioning Trusts and Other Investments
The nuclear decommissioning trusts and other investments hold debt and equity securities directly and indirectly through commingled funds and institutional mutual funds. Exchange-traded debt and equity securities held directly are valued using quoted market prices in actively traded markets. The commingled funds and institutional mutual funds which hold exchange-traded equity or debt securities are valued based on the underlying securities, using quoted prices in actively traded markets. Non-exchange-traded fixed income securities are valued based upon quotations available from brokers or pricing services. A primary price source is identified by asset type, class or issue for each security. The trustees monitor prices supplied by pricing services and may use a supplemental price

33


source or change the primary price source of a given security if the trustees determine that another price source is considered to be preferable. Detroit EdisonThe Company has obtained an understanding of how these prices are derived, including the nature and observability of the inputs used in deriving such prices. Additionally, Detroit Edisonthe Company selectively corroborates the fair values of securities by comparison of market-based price sources.
Derivative Assets and Liabilities
Derivative assets and liabilities are comprised of physical and financial derivative contracts, including futures, forwards, options and swaps that are both exchange-traded and over-the-counter traded contracts. Various inputs are used to value derivatives depending on the type of contract and availability of market data. Exchange-traded derivative contracts are valued using quoted prices in active markets. The Company considers the following criteria in determining whether a market is considered active: frequency in which pricing information is updated, variability in pricing between sources or over time and the availability of public information. Other derivative contracts are valued based upon a variety of inputs including commodity market prices, broker quotes, interest rates, credit ratings, default rates, market-based seasonality and basis differential factors. The Company monitors the prices that are supplied by brokers and pricing services and may use a supplemental price source or change the primary price source of an index if prices become unavailable or another price source is determined to be more representative of fair value. The Company has obtained an understanding of how these prices are derived. Additionally, the Company selectively corroborates the fair value of its transactions by comparison of market-based price sources. Mathematical valuation models are used for derivatives for which external market data is not readily observable, such as contracts which extend beyond the actively traded reporting period.
Fair Value of Financial Instruments
The fair value of long-term debt is determined by using quoted market prices when available and a discounted cash flow analysis based upon estimated current borrowing rates when quoted market prices are not available. The table below shows the fair value and the carrying value for long-term debt securities. Certain other financial instruments, such as notes payable, customer deposits and notes receivable are not shown as carrying value approximates fair value. See Note 54 for further fair value information on financial and derivative instruments.


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December 31, 2011 December 31, 2010December 31, 2009
 Fair Value Carrying Value Fair Value Carrying Value
Long-Term Debt$5.7 billion$5.1 billion $5.3 billion $5.0 billion$5.2 billion$5.0 billion
Nuclear Decommissioning Trust Funds
Detroit Edison has a legal obligation to decommission its nuclear power plants following the expiration of their operating licenses. This obligation is reflected as an asset retirement obligation on the Consolidated Statements of Financial Position. See Note 9 for additional information.
The NRC has jurisdiction over the decommissioning of nuclear power plants and requires decommissioning funding based upon a formula. The MPSC and FERC regulate the recovery of costs of decommissioning nuclear power plants and both require the use of external trust funds to finance the decommissioning of Fermi 2. Rates approved by the MPSC provide for the recovery of decommissioning costs of Fermi 2 and the disposal of low-level radioactive waste. Detroit Edison is continuing to fund FERC jurisdictional amounts for decommissioning even though explicit provisions are not included in FERC rates. The Company believes the MPSC and FERC collections will be adequate to fund the estimated cost of decommissioning using the NRC formula. The decommissioning assets, anticipated earnings thereon and future revenues from decommissioning collections will be used to decommission Fermi 2. The Company expects the liabilities to be reduced to zero at the conclusion of the decommissioning activities. If amounts remain in the trust funds for Fermi 2 following the completion of the decommissioning activities, those amounts will be disbursed based on rulings by the MPSC and FERC. The decommissioning of Fermi 1 is funded by Detroit Edison. Contributions to the Fermi 1 trust are discretionary.See Note 7.

34


The following table summarizes the fair value of the nuclear decommissioning trust fund assets:
         
  December 31  December 31 
(in Millions) 2010  2009 
Fermi 2 $910  $790 
Fermi 1  3   3 
Low level radioactive waste  26   24 
       
Total $939  $817 
       

 December 31 December 31
(in Millions)2011 2010
Fermi 2$915
 $910
Fermi 13
 3
Low level radioactive waste19
 26
Total$937
 $939

At December 31, 2011, investments in the nuclear decommissioning trust funds consisted of approximately 57% in publicly traded equity securities, 41% in fixed debt instruments and 2% in cash equivalents. At December 31, 2010, investments in the nuclear decommissioning trust funds consisted of approximately 61% in publicly traded equity securities, 38% in fixed debt instruments and 1% in cash equivalents. At December 31, 2009, investments in the nuclear decommissioning trust funds consisted of approximately 51% in publicly traded equity securities, 48% in fixed debt instruments and 1% in cash equivalents. The debt securities at both December 31, 20102011 and December 31, 20092010 had an average maturity of approximately 67 and 56 years, respectively.
The costs of securities sold are determined on the basis of specific identification. The following table sets forth the gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds:
             
  Year Ended
  December 31
(in Millions) 2010  2009  2008 
Realized gains $192  $37  $34 
Realized losses $(83) $(55) $(49)
Proceeds from sales of securities $377  $295  $232 

 
Year Ended
December 31
(in Millions)2011 2010 2009
Realized gains$46
 $192
 $37
Realized losses$(38) $(83) $(55)
Proceeds from sales of securities$80
 $377
 $295


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Realized gains and losses from the sale of securities for the Fermi 2 trust and the low level radioactive waste funds are recorded to the Regulatory asset and Nuclear decommissioning liability. The following table sets forth the fair value and unrealized gains for the nuclear decommissioning trust funds:
         
  Fair  Unrealized 
(in Millions) Value  Gains 
As of December 31, 2010        
Equity securities $572  $77 
Debt securities  361   11 
Cash and cash equivalents  6    
       
  $939  $88 
       
         
As of December 31, 2009        
Equity securities $420  $135 
Debt securities  388   17 
Cash and cash equivalents  9    
       
  $817  $152 
       

 Fair Unrealized
(in Millions)Value Gains
As of December 31, 2011   
Equity securities$533
 $80
Debt securities385
 22
Cash and cash equivalents19
 
 $937
 $102
As of December 31, 2010   
Equity securities$572
 $77
Debt securities361
 11
Cash and cash equivalents6
 
 $939
 $88

Securities held in the nuclear decommissioning trust funds are classified as available-for-sale. As Detroit Edison does not have the ability to hold impaired investments for a period of time sufficient to allow for the anticipated recovery of market value, all unrealized losses are considered to be other than temporary impairments.
Impairment charges for unrealizedUnrealized losses incurred by the Fermi 2 trust are recognized as a Regulatory asset. Detroit Edison recognized $26$67 million and $48$26 million of unrealized losses as Regulatory assets at December 31, 20102011 and 2009,2010, respectively. Since the decommissioning of Fermi 1 is funded by Detroit Edison rather than through a regulatory recovery mechanism, there is no corresponding regulatory asset treatment. Therefore, impairment charges for unrealized losses incurred by the Fermi 1 trust are recognized in earnings immediately. There were no impairment chargesunrealized losses recognized in 2011, 2010 2009 and 20082009 for Fermi 1.

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Other Available-For-Sale Securities
The following table summarizes the fair value of the Company’s investment in available-for-sale debt and equity securities, excluding nuclear decommissioning trust fund assets:
                 
  December 31, 2010 December 31, 2009
(in Millions) Fair Value Carrying value Fair Value Carrying Value
Cash equivalents $125  $125  $105  $105 
Equity securities  4   4   4   4 

 December 31, 2011 December 31, 2010
(in Millions)Fair Value Carrying value Fair Value Carrying Value
Cash equivalents$129
 $129
 $125
 $125
Equity securities4
 4
 4
 4

As of December 31, 2011 and 2010, these securities are comprised primarily of money-market and equity securities. Gains (losses) related to trading securities held at December 31, 2011, 2010 and 2009 and 2008 were $3 million, $7 million and $8 million, and $(14) million, respectively.
NOTE 54 — FINANCIAL AND OTHER DERIVATIVE INSTRUMENTS
The Company recognizes all derivatives at their fair value on the Consolidated Statements of Financial Position unless they qualify for certain scope exceptions, including the normal purchases and normal sales exception. Further, derivatives that qualify and are designated for hedge accounting are classified as either hedges of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge), or as hedges of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge). For cash flow hedges, the portion of the derivative gain or loss that is effective in offsetting the change in the value of the underlying exposure is deferred in Accumulated other comprehensive income and later reclassified into earnings when the underlying transaction occurs. For fair value hedges, changes in fair values for the derivative are recognized in earnings each period. Gains and losses from the ineffective portion of any hedge are recognized in earnings immediately. For derivatives that do not qualify or are not designated for hedge accounting, changes in fair value are recognized in earnings each period.

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Detroit Edison’s primary market risk exposure is associated with commodity prices, credit and interest rates. The Company has risk management policies to monitor and manage market risks. The Company uses derivative instruments to manage some of the exposure. Detroit Edison generates, purchases, distributes and sells electricity. Detroit Edison uses forward energy and capacity contracts to manage changes in the price of electricity and fuel. Substantially all of these contracts meet the normal purchases and sales exemption and are therefore accounted for under the accrual method. Other derivative contracts are recoverable through the PSCR mechanism when settled. This results in the deferral of unrealized gains and losses as Regulatory assets or liabilities, until realized.
The following represents the fair value of derivative instruments as of December 31, 20102011 and 2009:2010:
         
  Year Ended 
  December 31 
(in Millions) 2010  2009 
FTRs — Other current assets $2  $2 
Emissions — Other current liabilities  (3)  (5)
Emissions — Other non-current liabilities     (3)
       
Total derivatives not designated as hedging instrument $(1) $(6)
       

 
Year Ended
December 31
(in Millions)2011 2010
FTRs — Other current assets$1
 $2
Emissions — Other current liabilities
 (3)
Total derivatives not designated as hedging instrument$1
 $(1)

The effect of derivative instruments recoverable through the PSCR mechanism when realized on the Consolidated Statements of Financial Position arewere $3 million in gains related to FTRs recognized in Regulatory Liabilities for the year ended December 31, 2011, and $1 million in losses related to Emissions recognized in Regulatory assets and $6 million in gains related to FTRs recognized in Regulatory liabilities for the year ended December 31, 2010, and $14 million and $2 million in losses related to Emissions recognized in Regulatory assets and Regulatory liabilities, respectively, for the year ended December 31, 2009.2010.

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The following represents the cumulative gross volume of derivative contracts outstanding as of December 31, 2010:2011:
CommodityNumber of Units
Emissions (Tons)1,750
FTRs (MW)36,21953,753
NOTE 65 — PROPERTY, PLANT AND EQUIPMENT
Summary of property by classification as of December 31:
         
(in Millions) 2010  2009 
Property, Plant and Equipment
        
Generation $9,268  $8,833 
Distribution  6,800   6,618 
       
Total  16,068   15,451 
       
         
Less Accumulated Depreciation and Amortization
        
Generation  (3,850)  (3,890)
Distribution  (2,568)  (2,243)
       
Total  (6,418)  (6,133)
       
Net Property, Plant and Equipment
 $9,650  $9,318 
       

(in Millions)2011 2010
Property, Plant and Equipment   
Generation$9,785
 $9,268
Distribution7,003
 6,800
Total16,788
 16,068
Less Accumulated Depreciation and Amortization   
Generation(3,946) (3,850)
Distribution(2,580) (2,568)
Total(6,526) (6,418)
Net Property, Plant and Equipment$10,262
 $9,650

AFUDC capitalized during 20102011 and 20092010 was approximately $10$9 million and $12$10 million, respectively.
The composite depreciation rate for Detroit Edison was approximately 3.3% in 2011, 2010 2009 and 2008.2009.
The average estimated useful life for our generation and distribution property was 4046 years and 3743 years, respectively, at December 31, 2010.2011.
Capitalized software costs are classified as Property, plant and equipment and the related amortization is included in Accumulated depreciation and amortization on the Consolidated Statements of Financial Position. The Company capitalizes the costs associated with computer software it develops or obtains for use in its business. The Company amortizes capitalized software costs on a straight-line basis over the expected period of benefit, ranging from 5 to 15 years.

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Capitalized software costs amortization expense was $58 million in 2011, $55 million in 2010 $55and 2009. The gross carrying amount and accumulated amortization of capitalized software costs at December 31, 2011 were $501 million in 2009, and $45$218 million, in 2008.respectively. The gross carrying amount and accumulated amortization of capitalized software costs at December 31, 2010 were $479 million and $175 million, respectively. The gross carrying amount and accumulated amortization of capitalized software costs at December 31, 2009 were $488 million and $161 million, respectively. Amortization expense of capitalized software costs is estimated to be approximately $55 million annually for 20112012 through 2015.2016.
Gross property under capital leases was $26 million and $121 million at December 31, 20102011 and December 31, 2009.2010, respectively. Accumulated amortization of property under capital leases was $96$14 million and $88$96 million at December 31, 20102011 and December 31, 2009,2010, respectively.
NOTE 76 — JOINTLY OWNED UTILITY PLANT
Detroit Edison has joint ownership interest in two power plants, Belle River and Ludington Hydroelectric Pumped Storage. Detroit Edison’s share of direct expenses of the jointly owned plants are included in Fuel and purchased power and Operation and maintenance expenses in the Consolidated Statements of Operations. Ownership information of the two utility plants as of December 31, 20102011 was as follows:

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      Ludington
      Hydroelectric
  Belle River Pumped Storage
In-service date  1984-1985   1973 
Total plant capacity 1,270MW  1,872MW 
Ownership interest   *  49%
Investment (in millions) $1,635  199 
Accumulated depreciation (in millions) $923  117 

    
Ludington
Hydroelectric
 Belle River Pumped Storage
In-service date1984-1985
  1973
 
Total plant capacity1,270
MW  1,872
MW 
Ownership interest * 49% 
Investment (in millions)$1,645
  $199
 
Accumulated depreciation (in millions)$943
  $158
 

*Detroit Edison’s ownership interest is 63% in Unit No. 1, 81% of the facilities applicable to Belle River used jointly by the Belle River and St. Clair Power Plants and 75% in common facilities used at Unit No. 2.
Belle River
The Michigan Public Power Agency (MPPA) has an ownership interest in Belle River Unit No. 1 and other related facilities. The MPPA is entitled to 19% of the total capacity and energy of the plant and is responsible for the same percentage of the plant’s operation, maintenance and capital improvement costs.
Ludington Hydroelectric Pumped Storage
Consumers Energy Company has an ownership interest in the Ludington Hydroelectric Pumped Storage Plant. Consumers Energy is entitled to 51% of the total capacity and energy of the plant and is responsible for the same percentage of the plant’s operation, maintenance and capital improvement costs.
NOTE 87 — ASSET RETIREMENT OBLIGATIONS
The Company has a legal retirement obligation for the decommissioning costs for its Fermi 1 and Fermi 2 nuclear plants. The Company has conditional retirement obligations for disposal of asbestos at certain of its power plants. To a lesser extent, the Company has conditional retirement obligations atplants, certain service centers and disposal costs for PCB contained within transformers and circuit breakers. The Company recognizes such obligations as liabilities at fair market value when they are incurred, which generally is at the time the associated assets are placed in service. Fair value is measured using expected future cash outflows discounted at our credit-adjusted risk-free rate. The Company defers timing differences that arise in the expense recognition of legal asset retirement costs that are currently recovered in rates.
No liability has been recorded with respect to lead-based paint, as the quantities of lead-based paint in the Company’s facilities are unknown. In addition, there is no incremental cost to demolitions of lead-based paint facilities vs. non-lead-based paint facilities and no regulations currently exist requiring any type of special disposal of items containing lead-based paint.
The Ludington Hydroelectric Power Plant (a jointly owned plant) has an indeterminate life and no legal obligation currently exists to decommission the plant at some future date. Substations, manholes and certain other distribution assets within Detroit Edison have an indeterminate life. Therefore, no liability has been recorded for these assets.

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A reconciliation of the asset retirement obligations for 20102011 follows:
     
(in Millions)    
Asset retirement obligations at January 1, 2010 $1,300 
Accretion  84 
Liabilities incurred  10 
Liabilities settled  (6)
Revision in estimated cash flows  (22)
    
Asset retirement obligations at December 31, 2010  1,366 
Less amount included in current liabilities  (12)
    
  $1,354 
    

(in Millions) 
Asset retirement obligations at January 1, 2011$1,366
Accretion84
Liabilities incurred8
Liabilities settled(16)
Asset retirement obligations at December 31, 20111,442
Less amount included in current liabilities(2)
 $1,440

In 2001, Detroit Edison began the final decommissioning of Fermi 1, with the goal of removing the remaining radioactive material and terminating the Fermi 1 license. In 2011, based on management decisions revising the timing and estimate of cash flows, Detroit Edison accrued an additional $19 million with respect to the decommissioning of Fermi 1. Management intends to suspend decommissioning activities and place the facility in safe storage status. The expense amount has been recorded in Asset (gains) and losses, reserves and impairments, net on the Consolidated Statements of Operations. In addition, based on updated studies revising the timing and estimate of cash flows, a reduction of approximately $20 million was made to the Detroit Edison asset retirement obligation for asbestos removal with approximately $6 million of the decrease associated with Fermi 1 recorded in Asset (gains) and losses, reserves and impairments, net on the Consolidated Statements of Operations.
Detroit Edison has a legal obligation to decommission its nuclear power plants following the expiration of their operating licenses. This obligation is reflected as an asset retirement obligation on the Consolidated Statements of Financial Position. In 2010, Detroit Edison filed a rate case withOctober 2011, the MPSC proposingapproved Detroit Edison's request for a reduction to the nuclear

38


decommissioning surcharge under the assumption that it would request an extension of the Fermi 2 license for an additional 20 years beyond the term of the existing license which expires in 2025. Detroit Edison expects to request the license extension in 2014. This proposed extension of the license, including the associated impact on spent nuclear fuel, resulted in a revision in estimated cash flows for the Fermi 2 asset retirement obligation of approximately $22 million. It is estimated that the cost of decommissioning Fermi 2 is $1.3$1.4 billion in 20102011 dollars and $10 billion in 2045 dollars, using a 6% inflation rate. In 2001, Detroit Edison began the decommissioning of Fermi 1, with the goal of removing the radioactive material and terminating the Fermi 1 license. The decommissioning of Fermi 1 is expected to be completed by 2012. Approximately $1.3$1.4 billion of the asset retirement obligations represent nuclear decommissioning liabilities that are funded through a surcharge to electric customers over the life of the Fermi 2 nuclear plant.
The NRC has jurisdiction over the decommissioning of nuclear power plants and requires minimum decommissioning funding based upon a formula. The MPSC and FERC regulate the recovery of costs of decommissioning nuclear power plants and both require the use of external trust funds to finance the decommissioning of Fermi 2. Rates approved by the MPSC provide for the recovery of decommissioning costs of Fermi 2 and the disposal of low-level radioactive waste. Detroit Edison is continuing to fund FERC jurisdictional amounts for decommissioning even though explicit provisions are not included in FERC rates. The Company believes the MPSC and FERC collections will be adequate to fund the estimated cost of decommissioning. The decommissioning assets, anticipated earnings thereon and future revenues from decommissioning collections will be used to decommission Fermi 2. The Company expects the liabilities to be reduced to zero at the conclusion of the decommissioning activities. If amounts remain in the trust funds for Fermi 2 following the completion of the decommissioning activities, those amounts will be disbursed based on rulings by the MPSC and FERC.

A portion of the funds recovered through the Fermi 2 decommissioning surcharge and deposited in external trust accounts is designated for the removal of non-radioactive assets and the clean-up of the Fermi site. This removal and clean-up is not considered a legal liability. Therefore, it is not included in the asset retirement obligation, but is reflected as the nuclear decommissioning liability. The decommissioning of Fermi 1 is funded by Detroit Edison. Contributions to the Fermi 1 trust are discretionary. See Note 43 for additional discussion of Nuclear Decommissioning Trust Fund Assets.
NOTE 98 — RESTRUCTURING
Performance Excellence ProcessRestructuring Costs
In 2005, the Company initiated a company-wide review of its operations called the Performance Excellence Process. The Company incurred costs to achieve (CTA)CTA restructuring expense for employee severance, early retirement programs and other costs which include project management and consultant support.expense. In September 2006, the MPSC issued an order approving a settlement agreement that allowed Detroit Edison, commencing in 2006, to defer the incremental CTA. Further, the order provided for Detroit Edison to amortize the CTA deferrals over a ten-year period beginning with the year subsequent to the year the CTA was deferred. Detroit Edison deferred approximately $24 million of CTA in 2008 as a regulatory asset and capitalized $2 million. The recovery of these costs was provided for by the MPSC in the order approving the settlement in the show cause proceeding and in the December 23, 2008 MPSC rate order. Detroit Edison amortized prior year deferred CTA costs of $18 million in 2011, 2010 $18 million in 2009 and $16 million in 2008.2009. Amounts expensed are

34


recorded in Operation and maintenance expense on the Consolidated Statements of Operations. Deferred amounts are recorded in Regulatory assets on the Consolidated Statements of Financial Position.
NOTE 109 — REGULATORY MATTERS
Regulation
Detroit Edison is subject to the regulatory jurisdiction of the MPSC, which issues orders pertaining to rates, recovery of certain costs, including the costs of generating facilities and regulatory assets, conditions of service, accounting and operating-related matters. Detroit Edison is also regulated by the FERC with respect to financing authorization and wholesale electric activities. Regulation results in differences in the application of generally accepted accounting principles between regulated and non-regulated businesses.

39


Regulatory Assets and Liabilities
Detroit Edison is required to record regulatory assets and liabilities for certain transactions that would have been treated as revenue or expense in non-regulated businesses. Continued applicability of regulatory accounting treatment requires that rates be designed to recover specific costs of providing regulated services and be charged to and collected from customers. Future regulatory changes or changes in the competitive environment could result in the discontinuance of this accounting treatment for regulatory assets and liabilities for some or all of our businesses and may require the write-off of the portion of any regulatory asset or liability that was no longer probable of recovery through regulated rates. Management believes that currently available facts support the continued use of regulatory assets and liabilities and that all regulatory assets and liabilities are recoverable or refundable in the current rate environment.

35


The following are balances and a brief description of the regulatory assets and liabilities at December 31:
         
(in Millions) 2010  2009 
Assets
        
Recoverable pension and postretirement costs:        
Pension $1,329  $1,261 
Postretirement costs  472   515 
Asset retirement obligation  336   415 
Recoverable income taxes related to securitized regulatory assets  400   476 
Deferred income taxes — Michigan Business Tax  319   343 
Costs to achieve Performance Excellence Process  118   136 
Choice incentive mechanism  105    
Other recoverable income taxes  85   89 
Unamortized loss on reacquired debt  35   38 
Accrued PSCR revenue  52    
Enterprise Business Systems costs  21   24 
Recoverable restoration expense  19    
Electric Customer Choice implementation costs     18 
Other  44   18 
       
   3,335   3,333 
Less amount included in current assets  (58)   
       
  $3,277  $3,333 
       
         
Securitized regulatory assets $729  $870 
       
         
Liabilities
        
Asset removal costs $132  $157 
Deferred income taxes — Michigan Business Tax  362   367 
Renewable energy  125   32 
Refundable self implemented rates  27   27 
Refundable revenue decoupling  47    
Refundable costs under PA 141  33   27 
Refundable restoration expense  15   15 
Accrued PSCR refund     14 
Fermi 2 refueling outage  3   13 
Pension equalization mechanism     75 
Other  30   11 
       
   774   738 
Less amount included in current liabilities  (60)  (27)
       
  $714  $711 
       

(in Millions)2011 2010
Assets   
Recoverable pension and postretirement costs:   
Pension$1,656
 $1,329
Postretirement costs582
 472
Asset retirement obligation420
 336
Recoverable income taxes related to securitized regulatory assets316
 400
Recoverable Michigan income taxes270
 319
Choice incentive mechanism166
 105
Accrued PSCR revenue147
 52
Cost to achieve Performance Excellence Process100
 118
Other recoverable income taxes81
 85
Recoverable restoration expense58
 19
Unamortized loss on reacquired debt36
 35
Enterprise Business Systems costs18
 21
Other40
 44
 3,890
 3,335
Less amount included in current assets(272) (58)
 $3,618
 $3,277
Securitized regulatory assets$577
 $729
Liabilities   
Renewable energy$192
 $125
Refundable revenue decoupling127
 47
Asset removal costs73
 132
Energy Optimization24
 21
Low Income Energy Efficiency Fund23
 
Fermi 2 refueling outage23
 3
Refundable uncollectible expense13
 
Refundable Michigan income taxes
 362
Refundable costs under PA 141
 33
Refundable self implemented rates
 27
Refundable restoration expense
 15
Other6
 9
 481
 774
Less amount included in current liabilities(27) (60)
 $454
 $714

As noted below, regulatory assets for which costs have been incurred have been included (or are expected to be included, for costs incurred subsequent to the most recently approved rate case) in Detroit Edison’s rate base, thereby providing a return on invested costs. Certain regulatory assets do not result from cash expenditures and therefore do not represent investments included in rate base or have offsetting liabilities that reduce rate base.

40



36


ASSETS
Recoverable pension and postretirement costs— In 2007, the Company adopted ASC 715 (SFAS No. 158) which required, among other things, the recognition in other comprehensive income of the actuarial gains or losses and the prior service costs that arise during the period but that are not immediately recognized as components of net periodic benefit costs. The Company records the charge related to the additional liability as a regulatory asset since the traditional rate setting process allows for the recovery of pension and postretirement costs. The asset will reverse as the deferred items are recognized as benefit expenses in net income. (1)
Asset retirement obligation— This obligation is primarily for Fermi 2 decommissioning costs. The asset captures the timing differences between expense recognition and current recovery in rates and will reverse over the remaining life of the related plant. (1)
Recoverable income taxes related to securitized regulatory assets— Receivable for the recovery of income taxes to be paid on the non-bypassable securitization bond surcharge. A non-bypassable securitization tax surcharge recovers the income tax over a fourteen-year period ending 2015.
Deferred income taxes — Michigan Business Tax (MBT)— In July 2007, the MBT was enacted by the State of Michigan. State deferred tax liabilities were established for the Company’s utilities, and offsetting regulatory assets were recorded as the impacts of the deferred tax liabilities will be reflected in rates as the related taxable temporary differences reverse and flow through current income tax expense. (1)
Cost to achieve Performance Excellence Process (PEP)— The MPSC authorized the deferral of costs to implement the PEP. These costs consist of employee severance, project management and consultant support. These costs will be amortized over a ten-year period beginning with the year subsequent to the year the costs were deferred.
Choice incentive mechanism— Receivable for non-fuel revenues lost as a result of fluctuations in electric Customer Choice sales.
Other recoverable income taxes— Income taxes receivable from Detroit Edison’s customers representing the difference in property-related deferred income taxes and amounts previously reflected in Detroit Edison’s rates. This asset will reverse over the remaining life of the related plant. (1)
Unamortized loss on reacquired debt— The unamortized discount, premium and expense related to debt redeemed with a refinancing are deferred, amortized and recovered over the life of the replacement issue.
Accrued PSCR revenue— Receivable for the temporary under-recovery of and a return on fuel and purchased power costs incurred by Detroit Edison which are recoverable through the PSCR mechanism.
Enterprise Business Systems (EBS) costs— The MPSC approved the deferral and amortization over 10 years beginning in January 2009 of EBS costs that would otherwise be expensed.
Recoverable restoration expense— Receivable for the MPSC approved restoration expenses tracking mechanism that tracks the difference between actual restoration expense and the amount provided for in base rates, recognized pursuant to MPSC authorization.
Electric Customer Choice implementation costs— PA 141 permits, after MPSC authorization, the recovery of and a return on costs incurred associated with the implementation of the electric Customer Choice program.
Securitized regulatory assets— The net book balance of the Fermi 2 nuclear plant was written off in 1998 and an equivalent regulatory asset was established. In 2001, the Fermi 2 regulatory asset and certain other regulatory assets were securitized pursuant to PA 142 and an MPSC order. A non-bypassable securitization bond surcharge recovers the securitized regulatory asset over a fourteen-year period ending in 2015.
Recoverable pension and postretirement costs — Accounting rules for pension and postretirement benefit costs require, among other things, the recognition in other comprehensive income of the actuarial gains or losses and the prior service costs that arise during the period but that are not immediately recognized as components of net periodic benefit costs. The Company records the impact of actuarial gains and losses and prior service costs as a Regulatory asset since the traditional rate setting process allows for the recovery of pension and postretirement costs. The asset will reverse as the deferred items are amortized and recognized as components of net periodic benefit costs. (1)
Asset retirement obligation — This obligation is primarily for Fermi 2 decommissioning costs. The asset captures the timing differences between expense recognition and current recovery in rates and will reverse over the remaining life of the related plant.(1)
Recoverable income taxes related to securitized regulatory assets — Receivable for the recovery of income taxes to be paid on the non-bypassable securitization bond surcharge. A non-bypassable securitization tax surcharge recovers the income tax over a fourteen-year period ending 2015.
Recoverable Michigan income taxes In July 2007, the MBT was enacted by the State of Michigan. A State deferred tax liability was established, and an offsetting regulatory asset was recorded as the impact of the deferred tax liability will be reflected in rates as the related taxable temporary difference reverses and flows through current income tax expense. In May 2011, the MBT was repealed and the MCIT was enacted. The regulatory asset was remeasured to reflect the impact of the MCIT tax rate.(1)
Choice incentive mechanism (CIM) — Receivable for non-fuel revenues lost as a result of fluctuations in electric Customer Choice sales. The CIM was terminated in the October 20, 2011 MPSC order issued to Detroit Edison.
Accrued PSCR revenue — Receivable for the temporary under-recovery of and a return on fuel and purchased power costs incurred by Detroit Edison which are recoverable through the PSCR mechanism.
Cost to achieve Performance Excellence Process (PEP) — The MPSC authorized the deferral of costs to implement the PEP. These costs consist of employee severance, project management and consultant support. These costs are amortized over a ten-year period beginning with the year subsequent to the year the costs were deferred.
Other recoverable income taxes — Income taxes receivable from Detroit Edison’s customers representing the difference in property-related deferred income taxes and amounts previously reflected in Detroit Edison’s rates. This asset will reverse over the remaining life of the related plant.(1)
Recoverable restoration expense — Receivable for the MPSC approved restoration expense tracking mechanism that tracks the difference between actual restoration expense and the amount provided for in base rates, recognized pursuant to MPSC authorization. The restoration expense tracking mechanism was terminated in the October 20, 2011 MPSC order issued to Detroit Edison.
Unamortized loss on reacquired debt — The unamortized discount, premium and expense related to debt redeemed with a refinancing are deferred, amortized and recovered over the life of the replacement issue.
Enterprise Business Systems (EBS) costs — The MPSC approved the deferral and amortization over 10 years beginning in January 2009 of EBS costs that would otherwise be expensed.
Securitized regulatory assets — The net book balance of the Fermi 2 nuclear plant was written off in 1998 and an equivalent regulatory asset was established. In 2001, the Fermi 2 regulatory asset and certain other regulatory assets were securitized pursuant to PA 142 and an MPSC order. A non-bypassable securitization bond surcharge recovers the securitized regulatory asset over a fourteen-year period ending in 2015.

(1)Regulatory assets not earning a return.

41

LIABILITIES


LIABILITIESRenewable energy — Amounts collected in rates in excess of renewable energy expenditures.
Asset removal costs— The amount collected from customers for the funding of future asset removal activities.
Deferred income taxes — Michigan Business Tax —In July 2007, the MBT was enacted by the State of Michigan. State deferred tax assets were established for the Company’s utilities, and offsetting regulatory liabilities were recorded as the impacts of the deferred tax assets will be reflected in rates.
Renewable energy —Amounts collected in rates in excess of renewable energy expenditures.
Refundable self implemented rates —Amounts refundable to customers for base rates implemented in excess of amounts provided for in January 2010 Detroit Edison MPSC order.
Refundable revenue decoupling —Amounts refundable to Detroit Edison customers for the change in revenue resulting from the difference between actual average sales per customer compared to the base level of average sales per customer established by the MPSC.
Refundable costs under PA 141 —Detroit Edison’s 2007 CIM reconciliation and allocation resulted in the elimination of Regulatory Asset Recovery Surcharge (RARS) balances for commercial and industrial customers. RARS revenues received that exceed the regulatory asset balances are required to be refunded to the affected classes.
Refundable restoration expense —Amounts refundable for the MPSC approved restoration expenses tracking mechanism that tracks the difference between actual restoration expense and the amount provided for in base rates, recognized pursuant to the MPSC authorization.
Accrued PSCR refund— Liability for the temporary over-recovery of and a return on power supply costs and transmission costs incurred by Detroit Edison which are recoverable through the PSCR mechanism.
Fermi 2 refueling outage— Accrued liability for refueling outage at Fermi 2 pursuant to MPSC authorization.
Pension equalization mechanism— Pension expense refundable to customers representing the difference created from volatility in the pension obligation and amounts recognized pursuant to MPSC authorization.
Refundable revenue decoupling — Amounts refundable to Detroit Edison customers for the change in revenue resulting from the difference between actual average sales per customer compared to the base level of average sales per customer established by the MPSC.
Asset removal costs — The amount collected from customers for the funding of future asset removal activities.
Energy Optimization (EO) - The EO plan application is designed to help each customer class reduce their electric usage by: 1) building customer awareness of energy efficiency options and 2) offering a diverse set of programs and participation options that result in energy savings for each customer class.
Low Income Energy Efficiency Fund(LIEEF) — Escrow of LIEEF funds collected as ordered by the MPSC pursuant to July 2011 Michigan Court of Appeals decision.

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Fermi 2 refueling outage — Accrued liability for refueling outage at Fermi 2 pursuant to MPSC authorization.
Refundable uncollectible expense(UETM) Liability for the MPSC approved uncollectible expense tracking mechanism that tracks the difference in the fluctuation in uncollectible accounts and amounts recognized pursuant to the MPSC authorization. The UETM was terminated in the October 20, 2011 MPSC order issued to Detroit Edison.
Refundable Michigan income taxes — In July 2007, the MBT was enacted by the State of Michigan. State deferred tax assets were established for the Company's utilities, and offsetting regulatory liabilities were recorded as the impacts of the deferred tax assets will be reflected in rates. In May 2011, the MBT was repealed and the MCIT was enacted. The state deferred tax assets were eliminated under the MCIT and related regulatory liabilities were remeasured to zero.
Refundable costs under PA 141 — Detroit Edison’s 2007 CIM reconciliation and allocation resulted in the elimination of Regulatory Asset Recovery Surcharge (RARS) balances for commercial and industrial customers. RARS revenues received that exceed the regulatory asset balances are required to be refunded to the affected classes.
Refundable self implemented rates — Amounts refundable to customers for base rates implemented in excess of amounts authorized in MPSC orders.
Refundable restoration expense — Amounts refundable for the MPSC approved restoration expense tracking mechanism that tracks the difference between actual restoration expense and the amount provided for in base rates, recognized pursuant to the MPSC authorization. The restoration expense tracking mechanism was terminated in the October 20, 2011 MPSC order issued to Detroit Edison.
2010 Electric Rate Case Filing
Detroit Edison filed a rate case on October 29, 2010 based on a projected twelve-month period ending March 31, 2012. The filing with the MPSC requested a $443 million increase in base rates that is required to recover higher costs associated with environmental compliance, operation and maintenance of the Company’s electric distribution system and generation plants, inflation, the capital costs of plant additions, the reduction in territory sales, the impact from the expiration of certain wholesale for resale contracts and the increased migration of customers to the electric Customer Choice program. Detroit Edison also proposed certain adjustments which could reduce the net impact on the required increase in rates by approximately $190 million. These adjustments relate to electric Customer Choice migration, pension and other postretirement benefits expenses and the Nuclear Decommissioning surcharge.
2009 Electric Rate Case Filing
On January 11, 2010,October 20, 2011, the MPSC issued an order in Detroit Edison’s January 26, 2009Edison's October 29, 2010 rate case filing. The MPSC approved an annual revenue increase of $217 million or a 4.8% increase in Detroit Edison’s annual revenue requirement for 2010.$ 175 million. Included in the approved increase in revenues was a return on equity of 11%10.5% on an expected permanent capital structure of 49% equity and 51% debt capital structure. In addition, the order provided for continued application of adjustment mechanisms for electric Customer Choice sales and expenses associated with restoration costs (storm and non-storm) and line clearance expenses and implementation of RDM and UETM mechanisms.
Since the final rate relief ordered was less than the Company’sdebt. Detroit Edison self-implemented a rate increase of $280$107 million effective on July 26, 2009,April 28, 2011. The MPSC stated the net revenue collected due to self-implementation be credited to the 2011 Choice Incentive Mechanism (CIM) regulatory asset, but the order did not define "net revenue." The company credited the CIM Regulatory Asset for its estimate of the net revenue from self-implementation of approximately $37 million. Detroit Edison petitioned the MPSC ordered refunds for a rehearing and clarification of several issues in the period the self-implemented rates were in effect.October 2011 MPSC order. On December 21, 2010,20, 2011, the MPSC issued a rehearing order on selected issues, revising the annual revenue increase to $188 million. The rehearing order also affirmed the MPSC's decision to terminate the uncollectible expense tracker mechanism, but deferred ruling on other matters included in Detroit Edison's petition.
 Other key aspects of the October 20, 2011 MPSC order include the following:
adopt a new Revenue Decoupling Mechanism (RDM) effective April 1, 2012, that will compare actual revenue (excluding the impacts of weather) by rate class with the base established in this rate case. The RDM has an annual collar of 1.5% in the first year and 3% in the second and subsequent years. The RDM established in the previous rate case, which considered the impact of weather, was terminated effective October 31, 2011. Therefore, there will be no RDM in place from November 2011 through March 2012;
recognition of the expiration of a wholesale contract. Since the expiration of the wholesale contract was not until December 31, 2011, the MPSC required Detroit Edison to calculate a customer credit for each kWh sold under the wholesale contract from October 29, 2011 through December 31, 2011, with the credit to be applied in its next PSCR reconciliation;
the Restoration Expense Tracking Mechanism, Line Clearance Recovery Mechanism, Uncollectible Expense Tracking Mechanism and CIM are terminated as of the date of the order;
due to uncertainty resulting from the Michigan Court of Appeals overturning collection of the Low Income Energy Efficiency Fund (LIEEF), the MPSC required the continued collection of LIEEF amounts in base rates and placement into escrow pending further orders by the MPSC;
approval of Detroit Edison's proposal to reduce the Nuclear Decommissioning Surcharge by approximately $20 million annually; and
implementation of lower depreciation rates previously approved in a June 2011 MPSC order.

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2009 Detroit Edison Depreciation Filing

In compliance with an MPSC order, Detroit Edison filed a depreciation case in November 2009. On June 16, 2011, the MPSC issued an order authorizing this refund to be applied as credits to customer bills

42


during the January 2011 billing period.reducing Detroit Edison has a refund liability of approximately $27 million, including interest, at December 31, 2010 representing the refund due customers.
2009 Detroit Edison Depreciation Filing
In 2007, the MPSC ordered Michigan utilities to file depreciation studies using the current method, an approach that considers the time value of money and an inflation adjusted method proposed by the Company that removes excess escalation. In compliance with the MPSC order, Detroit Edison filed its ordered depreciation studies in November 2009. The various required depreciation studies indicateEdison's composite depreciation rates from 3.05%3.33% to 3.54%. The Company has proposed no change to its current composite depreciation rate3.06%, effective for accounting and ratemaking purposes, the day after the issuance of 3.33%. Anthe MPSC order is expected in the second quarter of 2011.2010 rate case.
Renewable Energy Plan
In March 2009, Detroit Edison filed its Renewable Energy Plan with the MPSC as required under Michigan Public Act 295 of 2008. The Renewable Energy Plan application requests authority to recover approximately $35 million of additional revenue in 2009. The proposed revenue increase is necessary in order to properly implement Detroit Edison’s 20-year renewable energy plan, to deliver cleaner, renewable electric generation to its customers, to further diversify Detroit Edison’s and the State of Michigan’s sources of electric supply, and to address the state and national goals of increasing energy independence. An MPSC order was issued in June 2009 approving the renewable energy plan and customer surcharges. The Renewable Energy Plan surcharges became effective in September 2009. (REP)

In August 2010, Detroit Edison filed its reconciliation for the 2009 plan year indicating that the 2009 actual renewable plan revenues and costs approximated the related surcharge revenues and cost of the filed plan. An MPSC order is expected in the first quarter of 2012.
In June 2011, Detroit Edison filed an amended REP with the MPSC requesting authority to continue to recover approximately $100 million of surcharge revenues. The proposed revenues are necessary in order to continue to properly implement Detroit Edison's 20-year REP, to deliver cleaner, renewable electric generation to its customers, to further diversify Detroit Edison's and the State of Michigan's sources of electric supply, and to address the state and national goals of increasing energy independence. On December 20, 2011, the MPSC issued an order approving the amended REP and authorizing the continuation of the surcharges.
In August 2011, Detroit Edison filed its reconciliation for the 2010 plan year indicating that the 2010 actual renewable plan revenues and costs approximated the related surcharge revenues and cost of the filed plan. An MPSC order is expected in the third quarter of 2011.2012.
Energy Optimization (EO) Plans
In March 2009,April 2011, Detroit Edison filed an application for approval of its reconciliation for 2010 EO plan expenses. Specifically, Detroit Edison's EO reconciliation includes a cumulative $21 million net over-recovery at year end 2010 for the 2010 EO plan. In November 2011, the MPSC approved a settlement agreement for Detroit Edison which authorized the over-recovery balances be included in the 2011 reconciliations.
In September 2011, Detroit Edison filed a biennial EO Plan with the MPSC as required under Michigan Public Act 295 of 2008. The EO Plan application is designed to help each customer class reduce their electric usage by: (1) building customer awareness of energy efficiency options and (2) offering a diverse set of programs and participation options that result in energy savings for each customer class. In March 2010,required. Detroit Edison filed an amended EO Plan with the MPSC. Detroit Edison’s amendedEdison's EO Plan application proposed the recovery of EO expenditures for the period 2010-20152012-2015 of $406$294 million and further requested approval of surcharges to recover these costs, including a financial incentive mechanism. The MPSC approved the amended EO Plan and the surcharge and tariff sheets reflecting the exclusion of the financial incentive mechanism. The disposition of the financial incentive mechanism is expected to be addressed in the EO reconciliation cases. In April 2010, Detroit Edison filed a reconciliation for the 2009 plan year. The Detroit Edison reconciliation included $3.2 million in overrecovery, net of $3 million in incentives. On February 8, 2011, the MPSC issued an order approving the 2009 EO reconciliation filing, including financial incentives.costs.
Detroit Edison Restoration Expense Tracker Mechanism (RETM) and Line Clearance Tracker (LCT) Reconciliation
In March 2010, Detroit Edison filed an application with the MPSC for approval of the reconciliation of its 2009 RETM and LCT. The Company’sCompany's 2009 restoration and line clearance expenses arewere less than the amount provided in rates. Accordingly, Detroit Edison has proposed a refund in the amount of approximately $16 million, including interest. On May 10, 2011, the MPSC issued an order approving the proposed refund and Detroit Edison began applying credits to customer bills in July 2011.
In March 2011, Detroit Edison filed an application with the MPSC for approval of the reconciliation of its 2010 RETM and LCT. The Company's 2010 restoration expenses were higher than the amount provided in rates. Accordingly, Detroit Edison requested recovery of $19.5 million. In October 2011, the MPSC approved a settlement agreement reconciling the RETM and approving the LCT report. The MPSC authorized surcharges to recover $19.5 million over a three-month period beginning November 1, 2011.
In January 2012, Detroit Edison filed an application with the MPSC for approval of the reconciliation of its 2011 RETM and LCT. The Company's 2011 restoration expenses were higher than the amount provided in rates. Accordingly, Detroit Edison requested net recovery of approximately $44 million.
Detroit Edison Revenue Decoupling Mechanism (RDM)
In May 2011, Detroit Edison filed an application with the MPSC for approval of its initial pilot RDM reconciliation for the period February 2010 through January 2011, requesting authority to refund to customers approximately $56 million, plus interest. This amount was accrued by Detroit Edison at December 31, 2011. There are various interpretations and alternative calculation methodologies relating to the pilot RDM refund calculation that could ultimately be adopted by the MPSC which may result in a range of customer refund amounts from $56 million to $140 million for this initial reconciliation filing under the pilot RDM.
In addition, Detroit Edison has accrued a pilot RDM liability for February 2011 through October 2011 of approximately $71 million, plus interest. Detroit Edison terminated the pilot RDM effective October 2011, and has requested a rehearing on this

39


issue asserting that for reconciliation purposes, the pilot RDM should have been considered terminated in April 2011, when Detroit Edison self-implemented rates, consistent with prior MPSC orders. An April 2011 termination would result in a decrease to the liability. However, there can be no assurance that Detroit Edison will prevail in this matter. Similar to the initial reconciliation case, there are various interpretations and alternative calculation methodologies that could be adopted which may result in a range of refund obligations in excess of the amount accrued. Considering these variables, the potential customer refund amount could range from $10 million to $130 million for the second and final pilot RDM period.
The primary uncertainties involved in the calculation methodologies of the pilot RDM for both reconciliation periods include customer class groupings and treatment of fixed customer charges. The Company believes that the calculation methodology used and the resulting refund estimates recorded follow the requirements and intent of the MPSC orders and represent the most probable amount of Detroit Edison's pilot RDM refund liability as of December 31, 2011. An MPSC order on the initial filing is expected in the second quarterfirst half of 2011.2012. Detroit Edison is required to file an application with the MPSC for approval of its RDM reconciliation for the period February 2011 through October 2011 by May 2012. A newly designed RDM will be in effect beginning April 2012.

Detroit Edison Uncollectible Expense True-Up Mechanism (UETM)

In March 2010,2011, Detroit Edison filed an application with the MPSC for approval of its UETM for 20092010 requesting recovery ofauthority to refund approximately $4.5$7 million consisting of costs related to 20092010 uncollectible expense and associated carrying charges.expense. In August 2010,2011, the MPSC determined thatapproved a settlement agreement for the 2010 UETM was effective with its January 2010 order in Detroit Edison’s rate case and dismissed the request for UETM expenses for 2009.authorizing a refund of approximately $7 million to be applied as credits to customer bills beginning September 1, 2011.

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Detroit Edison Regulatory Asset Recovery Surcharge (RARS) ReconciliationChoice Incentive Mechanism (CIM)

In April 2010,March 2011, Detroit Edison filed an application with the MPSC for approval of the finalits CIM reconciliation for 2010 requesting recovery of its RARS.approximately $105 million. On January 20,December 6, 2011, the MPSC issued an orderapproved a settlement agreement for the 2010 CIM authorizing a refundsurcharges of approximately $28$105 million including interest,effective on a service rendered basis for the 12-month period beginning January 1, 2012.
On January 17, 2012, Detroit Edison filed an application with the MPSC for approval of its CIM reconciliation for the period from January 1, 2011 through October 28, 2011. The termination date of the CIM pursuant to bethe October 20, 2011 MPSC rate order is October 20, 2011. Detroit Edison requested recovery of approximately $73 million, net of the self implementation credit applied as credits to customer bills during the February 2011 billing period.per MPSC order.
Power Supply Cost Recovery Proceedings
The PSCR process is designed to allow Detroit Edison to recover all of its power supply costs if incurred under reasonable and prudent policies and practices. Detroit Edison’sEdison's power supply costs include fuel and related transportation costs, purchased and net interchange power costs, nitrogen oxide and sulfur dioxide emission allowances costs, urea costs, transmission costs and MISO costs. The MPSC reviews these costs, policies and practices for prudence in annual plan and reconciliation filings.
The following table summarizes
2010 PSCR Year - In March 2011, Detroit Edison’sEdison filed the 2010 PSCR reconciliation filing currently pending withcalculating a net under-recovery of $52.6 million that includes an over-recovery of $15.6 million for the MPSC:
Net Over-recovery,PSCR Cost of
PSCR YearDate Filedincluding interestPower Sold
2009March 2010$15.6 million$1.1 billion
2010 Plan Year2009 PSCR year. In September 2009, Detroit Edison submitted itsaddition, the 2010 PSCR plan case seeking approvalreconciliation includes an under-recovery of a levelized PSCR factor of 5.64 mills/kWh below$7.1 million for the amount included in base rates for all PSCR customers. The filing supports a 2010 power supply expense forecast of $1.2 billion. Also included in the filing is a request for approvalreconciliation of the Company’s expense associated with2007-2008 Pension Equalization Mechanism, and an over-refund of $3.8 million for the use2011 refund of urea in the selective catalytic reduction units at Monroe power plant as well as a request for approval of a contract for capacity and energy associated with a wind energy project. The Company has also requested authorityself-implemented rate increase related to recover transfer prices for renewable energy, coke oven gas expense and other potential expenses.the 2009 electric rate case filing.
2011 Plan Year - In September 2010, Detroit Edison filed its 2011 PSCR plan case seeking approval of a levelized PSCR factor of 2.98 mills/kWh below the amount included in base rates for all PSCR customers. The filing supports a total power supply expense forecast of $1.2 billion. The plan also includes approximately $36 million for the recovery of its projected 2010 PSCR under-recovery. An MPSC order was issued on December 6, 2011 approving the 2011 PSCR plan case as filed.
2012 Plan Year - In September 2011, Detroit Edison filed its 2012 PSCR plan case seeking approval of a levelized PSCR factor of 4.18 mills/kWh above the amount included in base rates for all PSCR customers. The filing supports a total power supply expense forecast of $1.4 billion. The plan also includes approximately $158 million for the recovery of its projected 2011 PSCR under-recovery.

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Low Income Energy Efficiency Fund

The Customer Choice and Electricity Reliability Act of 2000 authorized the creation of the LIEEF administered by the MPSC. The purpose of the fund is to provide shut-off and other protection for low income customers and to promote energy efficiency by all customer classes. Detroit Edison collects funding for the LIEEF as part of its base rates and remits the funds to the State of Michigan monthly. In July 2011, the Michigan Court of Appeals issued a decision reversing the portion of MichCon's June 2010 MPSC rate order that permitted MichCon to recover funding for the LIEEF in base rates. In response to the Court of Appeals decision, Detroit Edison ceased remitting payments for LIEEF funding to the State of Michigan. In October 2011, the MPSC issued an order directing Detroit Edison to continue collecting funds for LIEEF in rates and to escrow the collected funds pending further order by the MPSC. On January 26, 2012, the MPSC issued an order directing Detroit Edison to file a comprehensive plan by March 1, 2012 for refunding previously escrowed LIEEF funds of $23 million. On December 20, 2011, The Vulnerable Household Warmth Fund (VHWF) was created under Michigan law. The purpose of the fund is to provide payment or partial payment of bills for electricity, natural gas, propane, heating oil, or any other type of fuel used to heat the primary residence of a vulnerable customer during the 2011-2012 heating season. Effective with the new law, Detroit Edison is to contribute the amount collected in its base rates, previously remitted for the LIEEF, to the new VHWF. The monthly payments into the VHWF will cease on the earlier of September 30, 2012 or when $48 million has been is accumulated in the fund from payments by major Michigan electric and gas utilities.
Other
The Company is unable to predict the outcome of the unresolved regulatory matters discussed herein. Resolution of these matters is dependent upon future MPSC orders and appeals, which may materially impact the financial position, results of operations and cash flows of the Company.
NOTE 1110 — INCOME TAXES
Income Tax Summary
We are part of the consolidated federal income tax return of DTE Energy. The federal income tax expense for Detroit Edison is determined on an individual company basis with no allocation of tax benefits or expenses from other affiliates of DTE Energy. We had an income tax receivable of $48 million at December 31, 2011 and $152 million at December 31, 2010 and $75 million at December 31, 2009 due from DTE Energy.

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Total income tax expense varied from the statutory federal income tax rate for the following reasons:
             
(Dollars in Millions) 2010  2009  2008 
Income tax expense at 35% statutory rate $249  $211  $181 
             
Investment tax credits  (6)  (6)  (6)
Depreciation  3   3   3 
Employee Stock Ownership Plan dividends  (3)  (4)  (2)
Medicare Part D subsidy     (5)  (4)
Domestic production activities deduction  (6)  (5)  (2)
State and other income taxes, net of federal benefit  40   36   19 
Other, net  (7)  (2)  (3)
          
Total $270  $228  $186 
          
             
Effective income tax rate  38.0%  37.7%  36.0%
          

(Dollars in Millions)2011 2010 2009
Income tax expense at 35% statutory rate$246
 $249
 $211
Investment tax credits(6) (6) (6)
Depreciation3
 3
 3
Employee Stock Ownership Plan dividends(3) (3) (4)
Medicare Part D subsidy
 
 (5)
Domestic production activities deduction(6) (6) (5)
State and other income taxes, net of federal benefit39
 40
 36
Other, net(6) (7) (2)
Income Tax Expense$267
 $270
 $228
Effective income tax rate38.0% 38.0% 37.7%

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Components of income tax expense (benefits) were as follows:
             
(in Millions) 2010  2009  2008 
Current income taxes Federal $(89) $168  $66 
State and other income tax expense  37   45   30 
          
Total current income taxes  (52)  213   96 
          
Deferred income taxes Federal  297   4   91 
State and other income tax expense  25   11   (1)
          
Total deferred income taxes  322   15   90 
          
Total $270  $228  $186 
          
(in Millions)2011 2010 2009
Current income tax expense (benefit)     
  Federal$15
 $(89) $168
State and other income tax21
 37
 45
Total current income taxes36
 (52) 213
Deferred income tax expense (benefit)     
  Federal193
 297
 4
State and other income tax38
 25
 11
       Total deferred income taxes231
 322
 15
Total$267
 $270
 $228
Deferred tax assets and liabilities are recognized for the estimated future tax effect of temporary differences between the tax basis of assets or liabilities and the reported amounts in the financial statements. Deferred tax assets and liabilities are classified as current or noncurrent according to the classification of the related assets or liabilities. Deferred tax assets and liabilities not related to assets or liabilities are classified according to the expected reversal date of the temporary differences. Consistent with rate making treatment, deferred taxes are offset in the table below for temporary differences which have related regulatory assets and liabilities.
Deferred tax assets (liabilities) were comprised of the following at December 31:
         
(in Millions) 2010  2009 
Property, plant and equipment $(1,819) $(1,409)
Securitized regulatory assets  (396)  (474)
Pension and benefits  57   103 
Other comprehensive income  10   9 
Other, net  (112)  (76)
       
  $(2,260) $(1,847)
       
         
(in Millions) 2010  2009 
Deferred income tax liabilities $(3,175) $(2,832)
Deferred income tax assets  915   985 
       
  $(2,260) $(1,847)
       
         
Current deferred income tax asset (included in Current Assets — Other) $  $24 
Current deferred income tax liability (included in Current Liabilities — Other)  (25)   
Long -term deferred income tax liabilities  (2,235)  (1,871)
       
  $(2,260) $(1,847)
       
(in Millions)2011 2010
Property, plant and equipment$(2,285) $(1,819)
Securitized regulatory assets(384) (396)
Pension and benefits67
 57
Other comprehensive income15
 10
Other, net(182) (112)
 $(2,769) $(2,260)

(in Millions)2011 2010
Deferred income tax liabilities$(3,377) $(3,175)
Deferred income tax assets608
 915
 $(2,769) $(2,260)
Current deferred income tax liability (included in Current Liabilities — Other)$(68) $(25)
Long-term deferred income tax liabilities(2,701) (2,235)
 $(2,769) $(2,260)
The above table excludes deferred tax liabilities associated with unamortized investment tax credits that are shown separately on the Consolidated Statements of Financial Position. Investment tax credits are deferred and amortized to income over the average life of the related property.

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Uncertain Tax Positions
A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
             
(in Millions) 2010  2009  2008 
Balance at January 1 $96  $70  $7 
Additions for tax positions of current years  6   10   72 
Additions for tax positions of prior years  1   24   (9)
Reductions for tax positions of prior years     (8)   
Settlements  (85)      
          
Balance at December 31 $18  $96  $70 
          
Unrecognized
(in Millions)2011 2010 2009
Balance at January 1$18
 $96
 $70
Additions for tax positions of current years1
 6
 10
Additions for tax positions of prior years45
 1
 24
Reductions for tax positions of prior years(5) 
 (8)
Settlements
 (85) 
Balance at December 31$59
 $18
 $96

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The Company had $4 million and $3 million of unrecognized tax benefits at December 31, 2011 and at December 31, 2010, respectively, that, if recognized, would favorably impact our effective tax rate by $3 million.rate. During the next twelve months, it is reasonably possible that the Company will settle certain federal and state tax examinations and audits. As a result, the Company believes that it is possible that there will be a decrease in unrecognized tax benefits of up to $54 million within the next twelve months.
The Company recognizes interest and penalties pertaining to income taxes in Interest expense and Other expenses, respectively, on its Consolidated Statements of Operations. Accrued interest pertaining to income taxes totaled $1$2 million and $6$1 million at December 31, 20102011 and December 31, 2009,2010, respectively. The Company had no accrued penalties pertaining to income taxes. The Company recognized $1 million for interest expense related to income taxes during 20102011 and $5 million for interest expense related to income taxes during 2009.2010.
In 2009, DTE Energy and its subsidiaries settled a federal tax audit for the 2004 through 2006 tax years. The resulting change to unrecognized tax benefits was not significant. In 2010, DTE Energy and its subsidiaries settled a federal tax audit for the 2007 and 2008 tax years, which resulted in the recognition of $85 million of unrecognized tax benefits by Detroit Edison. The Company’s U.S.Company's federal income tax returns for years 2009 and subsequent years remain subject to examination by the IRS. The Company’sCompany's Michigan Business Tax for the year 2008 and subsequent years is subject to examination by the State of Michigan. The Company also files tax returns in numerous state and local jurisdictions with varying statutes of limitation.
Michigan BusinessCorporate Income Tax (MCIT)
In July 2007,
On May 25, 2011, the Michigan Business Tax (MBT) was enacted by the State of Michigan to replacerepealed and the Michigan Single BusinessCorporate Income Tax (MSBT)was enacted effective January 1, 2008.2012. The MBT is comprised ofnew MCIT subjects corporations with business activity in Michigan to a 6 percent tax rate on an apportioned income tax base and eliminates the modified gross receipts tax and nearly all credits available under the old MBT. The MCIT also eliminated the future deductions allowed under MBT that enabled companies to establish a one-time deferred tax asset upon enactment of 0.8 percent and an apportioned business incomethe MBT to offset deferred tax liabilities that resulted from enactment of 4.95 percent. The MBT provides credits for Michigan business investment, compensation, and research and development. Legislation was also enacted, in 2007, by the StateMBT.

As a result of Michigan creating a deduction for businesses that realize an increase in theirthe enactment of the MCIT, the net state deferred tax liability duewas remeasured to reflect the impact of the new MCIT tax rate on cumulative temporary differences expected to reverse after the effective date. The net impact of this remeasurement was a decrease in deferred income tax liabilities of $30 million. The $30 million decrease in deferred tax liabilities was offset against the regulatory asset established upon the enactment of the MBT. The MBT is accounted for as an income tax.
The MBT consolidated deferred tax liability balance is $354 million as of December 31, 2010 and is reported netDue to the elimination of the related federalfuture tax benefit. Thedeductions allowed under the MBT, the one-time MBT deferred tax asset balance is $362 million as of December 31, 2010 and is reported netthat was established upon the enactment of the related federalMBT has been remeasured to zero. The net impact of this remeasurement is a reduction of net deferred tax liability.assets of $342 million. The regulated asset balance is $319$342 million anddecrease in deferred tax assets was offset against the regulated liability balance is $362 million asregulatory liabilities established upon enactment of December 31, 2010 and is further discussedthe MBT

Consistent with the original establishment of these deferred tax assets (liabilities), no recognition of these non-cash transactions have been reflected in Note 10.the Consolidated Statements of Cash Flows.
NOTE 1211 — LONG-TERM DEBT
OurThe Company's long-term debt outstanding and weighted average interest rates(1) of debt outstanding at December 31 were:
         
(in Millions) 2010  2009 
Taxable Debt, Principally Secured
        
5.5% due 2011 to 2038 $2,915  $2,829 
Tax- Exempt Revenue Bonds (2)
        
5.5% due 2011 to 2038  1,283   1,263 
       
   4,198   4,092 
Less amount due within one year  (152)  (513)
       
  $4,046  $3,579 
       
(in Millions)2011 2010
Taxable Debt, Principally Secured   
5.3% due 2012 to 2041$3,515
 $2,915
Tax- Exempt Revenue Bonds (2)   
5.1% due 2012 to 2038893
 1,283
 4,408
 4,198
Less amount due within one year(303) (152)
 $4,105
 $4,046
    
Securitization Bonds 
  
6.5% due 2012 to 2015$643
 $793
Less amount due within one year$(164) $(150)
 $479
 $643

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(in Millions) 2010  2009 
Securitization Bonds
        
6.5% due 2010 to 2015 $793  $933 
Less amount due within one year  (150)  (140)
       
  $643  $793 
       
(1)Weighted average interest rates as of December 31, 20102011 are shown below the description of each category of debt.
(2)Tax-Exempt Revenue Bonds are issued by a public body that loans the proceeds to Detroit Edison on terms substantially mirroring the Revenue Bonds.

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Debt Issuances
In 2010,2011, the Company issued or remarketed the following long-term debt:
(in Millions)
                 
Month Issued Type  Interest Rate  Maturity Amount 
 
August Senior Notes(1)  3.45%  2020  $300 
September Senior Notes(1)(2)  4.89%  2020   300 
December Tax-Exempt Revenue Bonds(3)  5.00%  2030   20 
                
              $620 
                
Month IssuedType Interest Rate
 Maturity Amount
AprilTax-Exempt Revenue Bonds (1) 2.35% 2024
 $31
MayMortgage Bonds (2) 3.90% 2021
 250
SeptemberMortgage Bonds (3) 4.31% 2023
 102
SeptemberMortgage Bonds (3) 4.46% 2026
 77
SeptemberMortgage Bonds (3) 5.67% 2041
 46
SeptemberTax-Exempt Revenue Bonds (4) 2.13% 2030
 82
SeptemberMortgage Bonds (5) 4.50% 2041
 140
       $728

(1) These bonds were remarketed for a three-year term ending April 1, 2014. The final maturity of the issue is October 1, 2024.
 
(2) Proceeds were used for general corporate purposes.
(1)Proceeds were used to repay a portion of Detroit Edison’s $500 million 6.125% Senior Notes due October 1, 2010 and for general corporate purposes.
(2)These bonds were priced in March 2010 in a private placement transaction which was closed and funded in September 2010.
(3)Proceeds were used to finance the acquisition and construction of improvements to certain electrical generating facilities and pollution control equipment at Detroit Edison’s Monroe Power Plant.
(3) Proceeds were used to retire callable tax-exempt revenue bonds and for general corporate purposes.
(4) These bonds were remarketed for a five year term ending September 1, 2016. The final maturity of the issue is September 1, 2030.
(5) Proceeds were used to retire approximately $140 million of callable tax-exempt revenue bonds and for general corporate purposes.
Debt Retirements and Redemptions
In 2010,2011, the following debt was retired:retired, through optional redemption or payment at maturity:
(in Millions)
                 
Month Retired Type  Interest Rate  Maturity  Amount 
September Senior Notes(1)  6.125%  2010  $500 
                
Month RetiredType Interest Rate Maturity Amount
MayTax-Exempt Revenue Bonds 6.95% 2011 $26
SeptemberTax-Exempt Revenue Bonds 5.55% 2029 118
SeptemberTax-Exempt Revenue Bonds 5.65% 2029 67
SeptemberTax-Exempt Revenue Bonds 5.65% 2029 40
SeptemberTax-Exempt Revenue Bonds 5.45% 2029 140
       $391
(1)These Senior Notes, maturing October 1, 2010, were optionally redeemed on September 30, 2010.

The following table shows the scheduled debt maturities, excluding any unamortized discount or premium on debt:
                             
                      2016 &  
(in Millions) 2011 2012 2013 2014 2015 thereafter Total
Amount to mature $302  $467  $440  $470  $315  $3,003  $4,997 

           2017 &  
(in Millions)2012 2013 2014 2015 2016 thereafter Total
Amount to mature$303
 $263
 $304
 $210
 $151
 $3,185
 $4,416
Cross Default Provisions
Substantially all of the net properties of Detroit Edison are subject to the lien of its mortgage. Should Detroit Edison fail to timely pay its indebtedness under this mortgage, such failure may create cross defaults in the indebtedness of DTE Energy.

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NOTE 1312 — PREFERRED AND PREFERENCE SECURITIES
At December 31, 2010,2011, Detroit Edison had approximately 6.75 million shares of preferred stock with a par value of $100 per share and 30 million shares of preference stock with a par value of $1 per share authorized, with no shares issued.
NOTE 1413 — SHORT-TERM CREDIT ARRANGEMENTS AND BORROWINGS

In August 2010,October 2011, Detroit Edison, entered into an amended and restated $212$300 million two-year unsecured revolving credit agreement and a new $63 million three-yearfive-year unsecured revolving credit agreement with a syndicate of 2320 banks that may be used for general corporate borrowings, but areis intended to provide liquidity support for the Company’scompany's commercial paper program. No one bank provides more than 8.25%8.5% of the commitment in any facility. Borrowings under the facilitiesfacility are available at prevailing short-term interest rates.
Detroit Edison entered into a one year $40 million letter of credit facility in December 2011. The facility was terminated early in January 2012 following cancellation of the letter of credit that it supported.
The above agreements require the Company to maintain a total funded debt to capitalization ratio of no more than 0.65 to 1. In the agreements, “total funded debt” means all indebtedness of the Company and its consolidated subsidiaries, including capital lease obligations, hedge agreements and guarantees of third parties’ debt, but excluding contingent obligations and nonrecourse and junior subordinated debt. “Capitalization” means the sum of (a) total funded debt plus (b) “consolidated net worth,” which is equal to consolidated total stockholders’ equity of the Company and its consolidated subsidiaries (excluding pension effects under certain FASB statements), as determined in accordance with accounting principles generally accepted in the United States of America. At December 31, 2010,2011, the total funded debt to total capitalization ratio for Detroit Edison was 0.52 to 1. Should Detroit Edison have delinquent obligations of at least $50 million to any creditor, such delinquency will be considered a default under its credit agreements. Detroit Edison had no outstanding short-term borrowings at December 31, 20102011 and 2009.2010.
NOTE 1514 — CAPITAL AND OPERATING LEASES
Lessee— The Company leases various assets under capital and operating leases, including coal cars,railcars, computers, vehicles and other equipment. The lease arrangements expire at various dates through 2023.
Future minimum lease payments under non-cancelable leases at December 31, 20102011 were:
         
  Capital  Operating 
(in Millions) Leases  Leases 
2011 $7  $25 
2012  5   23 
2013  5   19 
2014  5   15 
2015  5   13 
Thereafter  3   64 
       
Total minimum lease payments  30  $159 
        
Less imputed interest  4     
        
Present value of net minimum lease payments  26     
Less current portion  6     
        
Non-current portion $20     
        

 Capital Operating
(in Millions)Leases Leases
2012$4
 $28
20132
 23
20145
 18
20152
 17
2016
 16
Thereafter
 52
Total minimum lease payments13
 $154
Less imputed interest1
  
Present value of net minimum lease payments12
  
Less current portion(3)  
Non-current portion$9
  

Rental expense for operating leases was $57 million in 2011, $44 million in 2010, and $48 million in 2009, and $39 million in 2008.2009.
NOTE 1615 — COMMITMENTS AND CONTINGENCIES
Environmental
Air - Detroit Edison is subject to the EPA ozone and fine particulate transport and acid rain regulations that limit power plant emissions of sulfur dioxide and nitrogen oxides. Since 2005, the EPA and the State of Michigan have issued additional emission reduction regulations relating to ozone, fine particulate, regional haze, mercury, and mercuryother air pollution. The newThese rules will leadhave led to additional controls on fossil-fueled power plants to reduce nitrogen oxide, sulfur dioxide, mercury and mercuryother emissions. To comply with these requirements, Detroit Edison has spent approximately $1.5$1.7 billion through 2011. The

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Company estimates Detroit Edison will make capital expenditures of over $230approximately $255 million in 20112012 and up to $2.1approximately $1.9 billion of additional capital expenditures through 20202021 based on current regulations. Further, additional rulemakings are expected over the next few years which could require additional controls for sulfur dioxide, nitrogen oxides and hazardous air pollutants. ItThe Cross State Air Pollution Rule (CSAPR), finalized in July 2011, requires further reductions of sulfur dioxide and nitrogen oxides emissions beginning in 2012. On December 30, 2011, the United States Court of Appeals for the District of Columbia Circuit granted the motions to stay the rule, leaving Detroit Edison temporarily subject to the previously existing Clean Air Interstate Rule (CAIR). The Electric Generating Unit Maximum Achievable Control Technology (EGU MACT) Rule was finalized on December 16, 2011. The EGU MACT requires reductions of mercury and other hazardous air pollutants beginning in 2015. Because these rules were recently finalized and technologies to comply are still being tested, it is not possible to quantify the impact of those expected rulemakings at this time.these rulemakings.
In July 2009, DTE Energy received a Notice of Violation/Finding of Violation (NOV/FOV) from the EPA alleging, among other things, that five of Detroit Edison’sEdison power plants violated New Source Performance standards, Prevention of Significant Deterioration requirements, and operating permit requirements under the Clean Air Act. InAn additional NOV/FOV was received in June 2010 the EPA issued a NOV/FOV making similar allegations related to a recent project and outage at Unit 2 of the Monroe Power Plant.
On August 5, 2010, the United States Department of Justice, at the request of the EPA, brought a civil suit in the U.S. District Court for the Eastern District of Michigan against DTE Energy and Detroit Edison, related to the June 2010 NOV/FOV and the outage work performed at Unit 2 of the Monroe Power Plant, but not relating to the July 2009 NOV/FOV. Among other relief, the EPA is requestingrequested the court to require Detroit Edison to install and operate the best available control technology at Unit 2 of the Monroe Power Plant. Further, the EPA is requestingrequested the court to issue a preliminary injunction to require Detroit Edison to (i) begin the process of obtaining the necessary permits for the Monroe Unit 2 modification and (ii) offset the pollution from Monroe Unit 2 through emissions reductions from Detroit Edison’sEdison's fleet of coal-fired power plants until the new control equipment is operating. In January
On August 23, 2011, the EPA’sU.S. District judge granted DTE Energy's motion for preliminary injunction was denied and the liability phase ofsummary judgment in the civil suit has been scheduled for trialcase, dismissing the case and entering judgment in May 2011.
favor of DTE Energy.On October 20, 2011, the EPA caused to be filed a Notice of Appeal. A decision by the Court of Appeals is not expected until late 2012. DTE Energy and Detroit Edison believesbelieve that the plants identified by the EPA, including Unit 2 of the Monroe Power Plant, have complied with all applicable federal environmental regulations. Depending upon the outcome of discussions with the EPA regarding the NOV/FOV and the result of the civil action, Detroit Edisonappeals process, the Company could also be required to install additional pollution control equipment at some or all of the power plants in question, implement early retirement of facilities where control equipment is not economical, engage in supplemental environmental programs, and/or pay fines. Detroit EdisonThe Company cannot predict the financial impact or outcome of this matter, or the timing of its resolution.
Water - In response to an EPA regulation, Detroit Edison is required to examine alternatives for reducing the environmental impacts of the cooling water intake structures at several of its facilities. Based on the results of completed studies and expected future studies, Detroit Edison may be required to install additional control technologies to reduce the impacts of the water intakes. Initially, it was estimated that Detroit Edison could incur up to approximately $55 million in additional capital expenditures over the four to six years subsequent to 2008 to comply with these requirements. However, a January 2007 circuit court decision remanded back to the EPA several provisions of the federal regulation that has resulted in a delay in compliance dates. The decision also raised the possibility that Detroit Edison may have to install cooling towers at some facilities at a cost substantially greater than was initially estimated for other mitigative technologies. In 2008, the Supreme Court agreed to review the remanded cost-benefit analysis provision of the rule and in April 2009 upheld the EPA’sEPA's use of this provision in determining best technology available for reducing environmental impacts. Concurrently,The EPA published a proposed rule in 2011 that extended the EPA continuestime line to develop a revised2020 with an estimated expected increase in costs to $80 million. A final rule a draft of which is expected to be published in the first quarter of 2011, with a final rule scheduled for mid-2012. Themid-2012.The EPA has also issued an information collection request to begin a review of steam electric effluent guidelines. It is not possible at this time to quantify the impacts of these developing requirements.
Manufactured Gas Plant (MGP)Contaminated and Other Sites - Prior to the construction of major interstate natural gas pipelines, gas for heating and other uses was manufactured locally from processes involving coal, coke or oil. The facilities, which produced gas, have been designated as MGPmanufactured gas plant (MGP) sites. Detroit Edison owns, or previously owned,conducted remedial investigations at contaminated sites, including three former MGP sites. The investigations have revealed contamination related to the by-products of gas manufacturing at each site. In addition to the MGP sites, we arethe Company is also in the process of cleaning up other contaminated sites, where contamination is present as a result of historical and ongoing utility operations. These other sites includeincluding the area surrounding an engineered ash storage facility,landfill, electrical distribution substations, and underground and aboveground storage tank locations. Cleanup activities associated withThe findings of these investigations indicated that the estimated cost to remediate these sites willis expected to be conductedincurred over the next several years. At December 31, 2011 and December 31, 2010, the Company had $8 million and $9 million, respectively, accrued for remediation. Any significant change in assumptions, such as remediation techniques, nature and extent of contamination and regulatory requirements, could impact the estimate of remedial action costs for the sites and affect the Company's financial position and cash flows.

Landfill
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Detroit Edison owns and operates a permitted engineered ash storage facility at the Monroe Power Plant to dispose of fly ash from the coal fired power plant. Detroit Edison performed an engineering analysis in 2009 and identified the need for embankment side slope repairs and reconstruction.
The EPA has published proposed rules to regulate coal ash under the authority of the Resources Conservation and Recovery Act (RCRA). The proposed rule published onin June 21, 2010 contains two primary regulatory options to regulate coal ash residue. The EPA is currently considering either designating coal ash as a “Hazardous Waste” as defined by RCRA or regulating coal ash as non-hazardous waste under RCRA. Agencies and legislatures have urged

49


the EPA to regulate coal ash as a non-hazardous waste. If the EPA designates coal ash as a hazardous waste, the agency could apply some, or all, of the disposal and reuse standards that have been applied to other existing hazardous wastes to disposal and reuse of coal ash. Some of the regulatory actions currently being contemplated could have a significant impact on our operations and financial position and the rates we charge our customers. It is not possible to quantify the impact of those expected rulemakings at this time.
Nuclear Operations
Property Insurance
Detroit Edison maintains property insurance policies specifically for the Fermi 2 plant. These policies cover such items as replacement power and property damage. The Nuclear Electric Insurance Limited (NEIL) is the primary supplier of the insurance policies.
Detroit Edison maintains a policy for extra expenses, including replacement power costs necessitated by Fermi 2’s2's unavailability due to an insured event. This policy has a 12-week waiting period and provides an aggregate $490 million of coverage over a three-year period.
Detroit Edison has $500 million in primary coverage and $2.25 billion of excess coverage for stabilization, decontamination, debris removal, repair and/or replacement of property and decommissioning. The combined coverage limit for total property damage is $2.75 billion.
In 2007, the Terrorism Risk Insurance Extension Act of 2005 (TRIA) was extended through December 31, 2014. A major change in the extension is the inclusion of “domestic” acts of terrorism in the definition of covered or “certified” acts. For multiple terrorism losses caused by acts of terrorism not covered under the TRIA occurring within one year after the first loss from terrorism, the NEIL policies would make available to all insured entities up to $3.2 billion, plus any amounts recovered from reinsurance, government indemnity, or other sources to cover losses.
Under the NEIL policies, Detroit Edison could be liable for maximum assessments of up to approximately $28$29 million per event if the loss associated with any one event at any nuclear plant in the United States should exceed the accumulated funds available to NEIL.
Public Liability Insurance
As of January 1, 2011,2012, as required by federal law, Detroit Edison maintains $375 million of public liability insurance for a nuclear incident. For liabilities arising from a terrorist act outside the scope of TRIA, the policy is subject to one industry aggregate limit of $300 million. Further, under the Price-Anderson Amendments Act of 2005, deferred premium charges up to $117.5 million could be levied against each licensed nuclear facility, but not more than $17.5 million per year per facility. Thus, deferred premium charges could be levied against all owners of licensed nuclear facilities in the event of a nuclear incident at any of these facilities.
Nuclear Fuel Disposal Costs
In accordance with the Federal Nuclear Waste Policy Act of 1982, Detroit Edison has a contract with the U.S. Department of Energy (DOE) for the future storage and disposal of spent nuclear fuel from Fermi 2. Detroit Edison is obligated to pay the DOE a fee of 1 mill per kWh of Fermi 2 electricity generated and sold. The fee is accounted as a component of nuclear fuel expense. Delays have occurred in the DOE’sThe DOE's Yucca Mountain Nuclear Waste Repository program for the acceptance and disposal of spent nuclear fuel at a permanent repository and the proposed fiscal year 2011 federal budget recommends termination of funding for completion of the government’s long-term storage facility.was terminated in 2011. Detroit Edison is a party in the litigation against the DOE for both past and future costs associated with the DOE’sDOE's failure to accept spent nuclear fuel under the timetable set forth in the Federal Nuclear Waste Policy Act of 1982. Detroit Edison currently employs a spent nuclear fuel storage strategy utilizing a fuel pool. In 2011, theThe Company expectscontinues to begin loading spent nuclear fuel into andevelop its on-site dry cask storage facility whichand has postponed the initial offload from the spent fuel pool until 2013. The dry cask storage facility is expected to provide sufficient spent fuel storage capability for the life of the plant as defined by the original operating license. Issues relating to long-term waste disposal policy and to the disposition of funds contributed by Detroit Edison ratepayers to the federal waste fund await future governmental action.

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Guarantees
In certain limited circumstances, the Company enters into contractual guarantees. The Company may guarantee another entity’s obligation in the event it fails to perform. The Company may provide guarantees in certain indemnification agreements. Finally, the Company may provide indirect guarantees for the indebtedness of others.
In connection with the November 2010 sale of the steam heating business by Thermal Ventures II, L.P. an $11 million bank term loan was repaid and the guarantee by Detroit Edison was released. In addition, Detroit Edison made a new $6 million secured senior term loan to the new entity. The Company has reserved the entire amount of the term loan.
Labor Contracts
There are several bargaining units for the Company’s approximately 2,700 represented employees. In the 2010 third quarter, a new three-year agreement was ratified covering approximately 2,4002,800 represented employees. The remainingmajority of represented employees are under a contractcontracts that expiresexpire in August 2012.2012 and June 2013.
Purchase Commitments
As of December 31, 2010,2011, the Company was party to numerous long-term purchase commitments relating to a variety of goods and services required for the Company’s business. These agreements primarily consist of fuel supply commitments. The Company estimates that these commitments will be approximately $2.6$1.4 billion from 20112012 through 20262027 as detailed in the following table. Certain of these commitments are with variable interest entities where the Company determined it was not the primary beneficiary as it does not have significant exposure to losses.
     
(in Millions)    
2011 $633 
2012  441 
2013  222 
2014  194 
2015  136 
2016 - 2026  976 
    
  $2,602 
    

(in Millions) 
2012$747
2013360
2014228
201574
20162
2017 - 20276
 $1,417

The Company also estimates that 20112012 capital expenditures will be approximately $1$1.3 billion. The Company has made certain commitments in connection with expected capital expenditures.
Bankruptcies
The Company purchases and sells electricity from and to governmental entities and numerous companies operating in the steel, automotive, energy, retail and other industries. Certain of its customers have filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. The Company regularly reviews contingent matters relating to these customers and its purchase and sale contracts and records provisions for amounts considered at risk of probable loss. The Company believes its accrued amounts are adequate for probable loss. The final resolution of these matters may have a material effect on its consolidated financial statements.
Other Contingencies
The Company is involved in certain other legal, regulatory, administrative and environmental proceedings before various courts, arbitration panels and governmental agencies concerning claims arising in the ordinary course of business. These proceedings include certain contract disputes, additional environmental reviews and investigations, audits, inquiries from various regulators, and pending judicial matters. The Company cannot predict the final disposition of such proceedings. The Company regularly reviews legal matters and records provisions for claims that it can estimate and are considered probable of loss. The resolution of these pending proceedings is not expected to have a material effect on the Company’s operations or financial statements in the periodperiods they are resolved.
See Note 109 for a discussion of contingencies related to Regulatory Matters.

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NOTE 1716 — RETIREMENT BENEFITS AND TRUSTEED ASSETS
Measurement Date
In 2008, we changed the measurement date of our pension and postretirement benefit plans from November 30 to December 31. As a result, the Company recognized an adjustment of $15 million ($9 million after-tax) to retained earnings, which represents approximately one month of pension and other postretirement benefit costs for the period from December 1, 2007 to December 31, 2008.
Pension Plan Benefits
Detroit Edison participates in various plans that provide pension and other postretirement benefits for DTE Energy and its affiliates. The plans are sponsored by DTE Energy Corporate Services, LLC (LLC), a subsidiary of DTE Energy. Detroit Edison is allocated net periodic benefit costs for its share of the amounts of the combined plans.

48


The Company’s policy is to fund pension costs by contributing amounts consistent with the Pension Protection Act of 2006 provisions and additional amounts when it deems appropriate. The Company contributed $200 million to its pension plans in 2010, including2011. At the discretion of management, and depending upon financial market conditions, we anticipate making up to a contribution of DTE Energy stock of $100 million) consisting of approximately 2.2 million shares value at an average price of $44.97 per share). In January 2011, the Company contributed $200 million contribution to itsthe pension plans.plans in 2012.
Net pension cost includes the following components:
             
(in Millions) 2010  2009  2008 
Service cost $52  $43  $45 
Interest cost  153   158   148 
Expected return on plan assets  (171)  (165)  (163)
Amortization of:            
Net actuarial loss  70   38   27 
Prior service cost  5   7   5 
          
Net pension cost $109  $81  $62 
          
         
(in Millions) 2010  2009 
Other changes in plan assets and benefit obligations recognized in other comprehensive income and regulatory assets
        
Net actuarial loss $145  $177 
Amortization of net actuarial loss  (70)  (38)
Amortization of prior service cost  (5)  (7)
       
Total recognized in other comprehensive income and regulatory assets $70  $132 
       
         
Total recognized in net periodic pension cost, other comprehensive income and regulatory assets $178  $213 
Estimated amounts to be amortized from accumulated other comprehensive income and regulatory assets into net periodic benefit cost during next fiscal year        
Net actuarial loss $93  $70 
         
Prior service cost  4   5 
(in Millions)2011 2010 2009
Service cost$55
 $52
 $43
Interest cost154
 153
 158
Expected return on plan assets(168) (171) (165)
Amortization of:     
Net actuarial loss99
 70
 38
Prior service cost4
 5
 7
Special termination benefits2
 
 
Net pension cost$146
 $109
 $81

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(in Millions)2011 2010
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income   
Net actuarial loss$437
 $145
Amortization of net actuarial loss(99) (70)
Amortization of prior service cost(4) (5)
Total recognized in Regulatory assets and Other comprehensive income$334
 $70
Total recognized in net periodic pension cost, Regulatory assets and Other comprehensive income$480
 $178
Estimated amounts to be amortized from Regulatory assets and Accumulated other comprehensive income into net periodic benefit cost during next fiscal year 
  
Net actuarial loss$120
 $93
Prior service cost1
 4


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The following table reconciles the obligations, assets and funded status of the plan as well as the amount recognized as prepaid pension cost or pension liability in the Consolidated Statements of Financial Position at December 31.31:
         
(in Millions) 2010  2009 
Accumulated benefit obligation, end of year
 $2,697  $2,490 
       
         
Change in projected benefit obligation
        
Projected benefit obligation, beginning of year $2,677  $2,368 
Service cost  52   43 
Interest cost  153   158 
Actuarial loss  180   264 
Benefits paid  (163)  (156)
       
Projected benefit obligation, end of year $2,899  $2,677 
       
         
Change in plan assets
        
Plan assets at fair value, beginning of year $1,687  $1,387 
Actual return on plan assets  207   252 
Company contributions  205   204 
Benefits paid  (163)  (156)
       
Plan assets at fair value, end of year $1,936  $1,687 
       
Funded status of the plan $(963) $(990)
       
         
Amount recorded as:        
Current liabilities $(3) $(3)
Noncurrent liabilities  (960)  (987)
       
  $(963) $(990)
       
         
Amounts recognized in regulatory assets (see Note 10)
        
Net actuarial loss $1,314  $1,241 
Prior service cost  15   20 
       
  $1,329  $1,261 
       

(in Millions)2011 2010
Accumulated benefit obligation, end of year$2,963
 $2,697
Change in projected benefit obligation   
Projected benefit obligation, beginning of year$2,899
 $2,677
Service cost55
 52
Interest cost154
 153
Actuarial loss251
 180
Special termination benefits2
 
Benefits paid(165) (163)
Projected benefit obligation, end of year$3,196
 $2,899
Change in plan assets   
Plan assets at fair value, beginning of year$1,936
 $1,687
Actual return on plan assets(18) 207
Company contributions204
 205
Benefits paid(165) (163)
Plan assets at fair value, end of year$1,957
 $1,936
Funded status of the plan$(1,239) $(963)
Amount recorded as:   
Current liabilities$(8) $(3)
Noncurrent liabilities(1,231) (960)
 $(1,239) $(963)
Amounts recognized in Regulatory assets (see Note 9)   
Net actuarial loss$1,645
 $1,314
Prior service cost11
 15
 $1,656
 $1,329

Assumptions used in determining the projected benefit obligation and net pension costs are listed below:
             
  2010 2009 2008
Projected benefit obligation
            
Discount rate  5.50%  5.90%  6.90%
Rate of compensation increase  4.00%  4.00%  4.00%
             
Net pension costs
            
Discount rate  5.90%  6.90%  6.50%
Rate of compensation increase  4.00%  4.00%  4.00%
Expected long-term rate of return on plan assets  8.75%  8.75%  8.75%
 2011 2010 2009
Projected benefit obligation     
Discount rate5.00% 5.50% 5.90%
Rate of compensation increase4.20% 4.00% 4.00%
Net pension costs     
Discount rate5.50% 5.90% 6.90%
Rate of compensation increase4.00% 4.00% 4.00%
Expected long-term rate of return on plan assets8.50% 8.75% 8.75%
The Company employs a formal process in determining the long-term rate of return for various asset classes. Management reviews historic financial market risks and returns and long-term historic relationships between the asset classes of equities, fixed income and other assets, consistent with the widely accepted capital market principle that asset classes with higher volatility generate a greater return over the long-term. Current market factors such as inflation, interest rates, asset class risks and asset class returns are evaluated and considered before long-term capital market assumptions are determined. The long-term portfolio return is also established employing a consistent formal process, with due consideration of diversification, active investment management and rebalancing. Peer data is reviewed to check for reasonableness. The long-term portfolio return is also established employing a consistent formal process, with due consideration of diversification, active investment and rebalancing. As a result of this process, the Company is lowering its long-term rate of return assumptions for its pension and OPEB plans to 8.50%8.25% for 2011.2012. The Company believes this rate is a reasonable assumption for the long-term rate of return on its plan assets for 20112012 given its investment strategy.

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At December 31, 2010,2011, the benefits related to the Company’s qualified and nonqualified pension plans expected to be paid in each of the next five years and in the aggregate for the five fiscal years thereafter are as follows:
     
(in Millions)    
2011 $165 
2012  172 
2013  179 
2014  183 
2015  189 
2016 - 2020  1,045 
    
Total $1,933 
    
(in Millions) 
2012$179
2013182
2014186
2015193
2016199
2017 - 20211,107
Total$2,046

The Company employs a total return investment approach whereby a mix of equities, fixed income and other investments are used to maximize the long-term return on plan assets consistent with prudent levels of risk, with consideration given to the liquidity needs of the plan. The intent of this strategy is to minimize plan expenses over the long-term. Risk tolerance is established through consideration of future plan cash flows, plan funded status, and corporate financial considerations. The investment portfolio contains a diversified blend of equity, fixed income and other investments. Furthermore, equity investments are diversified across U.S. and non-U.S. stocks, growth and value investment styles, and large and small market capitalizations. Fixed income securities generally include corporate bonds of companies from diversified industries, mortgage-backed securities, and U.S. Treasuries. Other assets such as private equity and hedge funds are used to enhance long-term returns while improving portfolio diversification. Derivatives may be utilized in a risk controlled manner, to potentially increase the portfolio beyond the market value of invested assets and reduce portfolio investment risk. Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies, and quarterly investment portfolio reviews.
Target allocations for plan assets as of December 31, 20102011 are listed below:
U.S. Large Cap Equity Securities22%
U.S. Small Cap and Mid Cap Equity Securities5
Non U.S. Equity Securities20
Fixed Income Securities25
Hedge Funds and Similar Investments20
Private Equity and Other8
 100%
Fair Value Measurements at December 31, 2011(a)
       Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2011
Asset Category:       
Short-term investments(b)$
 $23
 $
 $23
Equity securities       
U.S. Large Cap(c)440
 27
 
 467
U.S. Small/Mid Cap(d)110
 4
 
 114
Non U.S(e)272
 79
 
 351
Fixed income securities(f)61
 448
 
 509
Other types of investments       
Hedge Funds and Similar Investments(g)132
 40
 205
 377
Private Equity and Other(h)
 
 116
 116
Total$1,015
 $621
 $321
 $1,957

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Fair Value Measurements at December 31, 2010(a)
       Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2010
Asset Category:       
Short-term investments (b)$
 $23
 $
 $23
Equity securities       
U.S. Large Cap(c)461
 26
 
 487
U.S. Small/Mid Cap(d)123
 5
 
 128
Non U.S(e)194
 151
 
 345
Fixed income securities(f)42
 409
 
 451
Other types of investments       
Hedge Funds and Similar Investments(g)128
 50
 206
 384
Private Equity and Other(h)
 
 118
 118
Total$948
 $664
 $324
 $1,936

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Fair Value Measurements at December 31, 2009(a)
                 
              Balance at 
(in Millions) Level 1  Level 2  Level 3  December 31, 2009 
Asset Category:
                
Short-term investments (b) $  $42  $  $42 
Equity securities                
U.S. Large Cap(c)  436   20      456 
U.S. Small/Mid Cap(d)  101   2      103 
Non U.S(e)  153   79      232 
Fixed income securities(f)  31   397      428 
Other types of investments                
Hedge Funds and Similar Investments(g)        320   320 
Private Equity and Other(h)        106   106 
             
Total $721  $540  $426  $1,687 
             
(a)See Note 43 — Fair Value for a description of levels within the fair value hierarchy.
(b)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category are obtained from quoted prices in actively traded markets or valuations from brokers or pricing services.
(c)This category comprises both actively and not actively managed portfolios that track the S&P 500 low cost equity index funds. Investments in this category are exchange-traded securities whereby unadjusted quote prices can be obtained. Exchange-traded securities held in a commingled fund are classified as Level 2 assets.
(d)This category represents portfolios of small and medium capitalization domestic equities. Investments in this category are exchange-traded securities whereby unadjusted quote prices can be obtained. Exchange-traded securities held in a commingled fund are classified as Level 2 assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category are exchange-traded securities whereby unadjusted quote prices can be obtained. Exchange-traded securities held in a commingled fund are classified as Level 2 assets.
(f)This category includes corporate bonds from diversified industries, U.S. Treasuries, and mortgage backedmortgage-backed securities. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services. Non-exchange traded securities and exchange-traded securities held in commingled funds are classified as Level 2 assets.
(g)This category includesutilizes a diversified group of funds and strategies that attempt to capture financial market inefficiencies. In 2009, pricinginefficiencies and includes publicly traded debt and equity, publicly traded mutual funds, commingled and limited partnership funds and non-exchange traded securities. Pricing for investments in this category was based on limited observable inputs as there was little, if any, publicly available pricing. Valuations forLevel 1 and level 2 assets in this category may be based on relevant publicly-traded securities, derivatives, and privately-traded securities. In 2010, pricing for investments in this category includedis obtained from quoted prices in activeactively traded markets and quotationsquoted prices from broker or pricing services. Non-exchangedNon-exchange traded securities held in commingled funds are classified as Level 2 assets. Valuations for some Level 3 assets in this category may be based on limited observable inputs as there may be little, if any, publicly available pricing.
(h)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in timber and private mezzanine debt. Pricing for investments in this category is based on limited observable inputs as there is little, if any, publicly available pricing. Valuations for assets in this category may be based on discounted cash flow analyses, relativerelevant publicly-traded comparables and comparable transactions.
The pension trust holds debt and equity securities directly and indirectly through commingled funds and institutional mutual funds. Exchange-traded debt and equity securities held directly are valued using quoted market prices in actively traded markets. The commingled funds and institutional mutual funds which hold exchange-traded equity or debt securities are valued based on underlying securities, using quoted prices in actively traded markets. Non-exchange traded fixed income securities are valued by the trustee based upon quotations available from brokers or pricing services. A primary price source is identified by asset type, class or issue for each security. The trustees monitor prices supplied by pricing services and may use a supplemental price source or change the primary price source of a given security if the trustees challenge an assigned price and determine that another price source is considered to be preferable. Detroit Edison has obtained an understanding of how these prices are

52


derived, including the nature and observability of the inputs used in deriving such prices. Additionally, Detroit Edison selectively corroborates the fair values of securities by comparison of market-based price sources.

55


Fair Value Measurements Using Significant Unobservable Inputs (Level 3):
             
  Hedge Funds       
  and Similar  Private Equity    
(in Millions) Investments  and Other  Total 
Beginning Balance at January 1, 2010 $320  $106  $426 
Total realized/unrealized gains (losses)  34   16   50 
Purchases, sales and settlements  (148)  (4)  (152)
          
Ending Balance at December 31, 2010 $206  $118  $324 
          
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period $20  $9  $29 
          
             
  Hedge Funds       
  and Similar  Private Equity    
(in Millions) Investments  and Other  Total 
Beginning Balance at January 1, 2009 $310  $105  $415 
Total realized/unrealized gains (losses)  20   (7)  13 
Purchases, sales and settlements  (10)  8   (2)
          
Ending Balance at December 31, 2009 $320  $106  $426 
          
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period $23  $(7) $16 
          
 
Hedge Funds
and Similar
 Private Equity  
(in Millions)Investments and Other Total
Beginning Balance at January 1, 2011$206
 $118
 $324
Total realized/unrealized gains (losses):    

Realized gains (losses)(3) 4
 1
Unrealized gains (losses)1
 (21) (20)
Purchases, sales and settlements:    

Purchases44
 16
 60
Sales(43) (1) (44)
Settlements     
Ending Balance at December 31, 2011$205
 $116
 $321
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period$3
 $(20) $(17)

 
Hedge Funds
and Similar
 Private Equity  
(in Millions)Investments and Other Total
Beginning Balance at January 1, 2010$320
 $106
 $426
Total realized/unrealized gains (losses)34
 16
 50
Purchases, sales and settlements(148) (4) (152)
Ending Balance at December 31, 2010$206
 $118
 $324
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period$20
 $9
 $29

There were no transfers between Level 3 and Level 2 and there were no significant transfers between Level 2 and Level 1 in the years ended December 31, 2011 and 2010.
The Company also sponsors defined contribution retirement savings plans. Participation in one of these plans is available to substantially all represented and non-represented employees. The Company matches employee contributions up to certain predefined limits based upon eligible compensation, the employee’s contribution rate and, in some cases, years of credit service. The cost of these plans was $17$18 million, $16$17 million, and $16 million in each of the years ended 2011, 2010, 2009, and 2008,2009, respectively.
Other Postretirement Benefits
The Company participates in plans sponsored by LLC that provide certain postretirement health care and life insurance benefits for employees who are eligible for these benefits. The Company’s policy is to fund certain trusts to meet our postretirement benefit obligations. Separate qualified Voluntary Employees Beneficiary Association (VEBA) trusts exist for represented and non-represented employees. The Company contributed $90$66 million to its postretirement medical and life insurance benefit plans during 2010.2011.
In January 2011,2012, the Company contributed $36$95 million to its other postretirement benefit plans. At the discretion of management, the Company may make up to an additional $90$120 million contribution to its VEBA trusts through the remainderin 2012.

53


Net postretirement cost includes the following components:
             
(in Millions) 2010  2009  2008 
Service cost $47  $45  $48 
Interest cost  95   102   94 
Expected return on plan assets  (52)  (42)  (58)
Amortization of:            
Net loss  38   53   27 
Prior service costs  2   2   2 
Net transition obligation  2   2   2 
          
Net postretirement cost $132  $162  $115 
          

56


         
(in Millions) 2010  2009 
Other changes in plan assets and APBO recognized in regulatory assets
        
Net actuarial loss (gain) $62  $(38)
Amortization of net actuarial loss  (38)  (52)
Prior service cost (credit)  (63)   
Amortization of prior service credit  (2)  (2)
Amortization of transition (asset)  (2)  (2)
       
Total recognized in regulatory assets $(43) $(94)
       
         
Total recognized in net periodic pension cost and regulatory assets $89  $68 
       
(in Millions)2011 2010 2009
Service cost$49
 $47
 $45
Interest cost91
 95
 102
Expected return on plan assets(62) (52) (42)
Amortization of:     
Net loss40
 38
 53
Prior service costs (credit)(15) 2
 2
Net transition obligation2
 2
 2
Net postretirement cost$105
 $132
 $162

(in Millions)2011 2010
Other changes in plan assets and APBO recognized in Regulatory assets   
Net actuarial loss (gain)$139
 $62
Amortization of net actuarial loss(40) (38)
Prior service cost (credit)(3) (63)
Amortization of prior service credit15
 (2)
Amortization of transition (asset)(2) (2)
Total recognized in regulatory assets$109
 $(43)
Total recognized in net periodic pension cost and Regulatory assets$214
 $89

Estimated amounts to be amortized from regulatoryRegulatory assets into net periodic benefit cost during next fiscal year
         
  2010 2009
Net actuarial loss $42  $38 
Prior service cost (credit)  (16)  2 
Net transition obligation  2   2 

 2011 2010
Net actuarial loss$55
 $42
Prior service cost (credit)(16) (16)
Net transition obligation2
 2

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Table of Contents

The following table reconciles the obligations, assets and funded status of the plans including amounts recorded as accrued postretirement cost in the Consolidated Statements of Financial Position at December 31:
         
(in Millions) 2010  2009 
Change in accumulated post retirement benefit obligation
        
Accumulated postretirement benefit obligation, beginning of year $1,650  $1,553 
Service cost  47   45 
Interest cost  95   102 
Plan amendments  (62)   
Actuarial loss  86   21 
Medicare Part D subsidy  5   4 
Benefits paid  (79)  (75)
       
Accumulated postretirement benefit obligation, end of year $1,742  $1,650 
       
         
Change in plan assets
        
Plan assets at fair value, beginning of year $593  $478 
Actual return on plan assets  76   99 
Company contributions  90   90 
Benefits paid  (77)  (75)
       
Plan assets at fair value, end of year $682  $592 
       
 
Funded status, end of year $(1,060) $(1,058)
       
         
Amount recorded as:
        
Non-current liabilities $(1,060) $(1,058)
       
         
Amounts recognized in regulatory assets (see Note 10)
        
Net actuarial loss $534  $510 
Prior service cost  (66)  (2)
Net transition obligation  4   7 
       
  $472  $515 
       

57


(in Millions)2011 2010
Change in accumulated postretirement benefit obligation   
Accumulated postretirement benefit obligation, beginning of year$1,742
 $1,650
Service cost49
 47
Interest cost91
 95
Plan amendments(3) (62)
Actuarial loss60
 86
Medicare Part D subsidy4
 5
Benefits paid(75) (79)
Accumulated postretirement benefit obligation, end of year$1,868
 $1,742
Change in plan assets   
Plan assets at fair value, beginning of year$682
 $593
Actual return on plan assets(17) 76
Company contributions66
 90
Benefits paid(80) (77)
Plan assets at fair value, end of year$651
 $682
Funded status, end of year$(1,217) $(1,060)
Amount recorded as:   
Non-current liabilities$(1,217) $(1,060)
Amounts recognized in Regulatory assets (see Note 9)   
Net actuarial loss$633
 $534
Prior service cost(53) (66)
Net transition obligation2
 4
 $582
 $472

Assumptions used in determining the projected benefit obligation and net benefit costs are listed below:
             
  2010  2009  2008 
Projected Benefit Obligation
            
Discount rate  5.50%  5.90%  6.90%
             
Net Benefit Costs
            
Discount rate  5.90%  6.90%  6.50%
Expected long-term rate of return on Plan assets  8.75%  8.75%  8.75%
Health care trend rate pre-65  7.00%  7.00%  7.00%
Health care trend rate post-65  7.00%  7.00%  6.00%
Ultimate health care trend rate  5.00%  5.00%  5.00%
Year in which ultimate reached  2016   2016   2011 
 2011 2010 2009
Projected benefit obligation     
Discount rate5.00% 5.50% 5.90%
Net benefit costs     
Discount rate5.50% 5.90% 6.90%
Expected long-term rate of return on plan assets8.75% 8.75% 8.75%
Health care trend rate pre- and post- 657.00% 7.00% 7.00%
Ultimate health care trend rate5.00% 5.00% 5.00%
Year in which ultimate reached2019
 2016
 2016

A one-percentage-point increase in health care cost trend rates would have increased the total service cost and interest cost components of benefit costs by $25$28 million and increased the accumulated benefit obligation by $242$247 million at December 31, 2010.2011. A one-percentage-point decrease in the health care cost trend rates would have decreased the total service and interest cost components of benefit costs by $20$17 million and would have decreased the accumulated benefit obligation by $204$208 million at December 31, 2010.2011.

55

Table of Contents

At December 31, 2010,2011, the benefits expected to be paid, including prescription drug benefits, in each of the next five years and in the aggregate for the five fiscal years thereafter are as follows:
     
(in Millions)    
2011 $81 
2012  85 
2013  102 
2014  107 
2015  113 
2016-2020  658 
    
  $1,146 
    

(in Millions) 
2012$82
201387
201493
201599
2016106
2017-2021636
 $1,103
The process used in determining the long-term rate of return for assets and the investment approach for the other postretirement benefits plans is similar to those previously described for theits pension plans.
Target allocations for plan assets as of December 31, 20102011 are listed below:

U.S. Equity Securities2522%
Non U.S. Equity Securities20
Fixed Income Securities25
Hedge Funds and Similar Investments20
Private Equity and Other1310
 100%
Fair Value Measurements at December 31, 2011(a)
       Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2011
Asset Category:       
Short-term investments(b)$1
 $8
 $
 $9
Equity securities       
U.S. Large Cap(c)116
 10
 
 126
U.S. Small/Mid Cap(d)46
 4
 
 50
Non U.S(e)116
 10
 
 126
Fixed income securities(f)15
 156
 
 171
Other types of investments       
Hedge Funds and Similar Investments(g)53
 14
 63
 130
Private Equity and Other(h)
 
 39
 39
Total$347
 $202
 $102
 $651


56


Fair Value Measurements at December 31, 2010(a)
       Balance at
(in Millions)Level 1 Level 2 Level 3 December 31, 2010
Asset Category:       
Short-term investments(b)$
 $5
 $
 $5
Equity securities       
U.S. Large Cap(c)83
 41
 
 124
U.S. Small/Mid Cap(d)40
 39
 
 79
Non U.S(e)52
 81
 
 133
Fixed income securities(f)3
 167
 
 170
Other types of investments       
Hedge Funds and Similar Investments(g)51
 32
 52
 135
Private Equity and Other(h)
 
 36
 36
Total$229
 $365
 $88
 $682

58



Fair Value Measurements at December 31, 2009(a)
                 
              Balance at 
(in Millions) Level 1  Level 2  Level 3  December 31, 2009 
Asset Category:
                
Short-term investments(b) $  $12  $  $12 
Equity securities                
U.S. Large Cap(c)  102   55      157 
U.S. Small/Mid Cap(d)  32   34      66 
Non U.S(e)  50   47      97 
Fixed income securities(f)  5   160      165 
Other types of investments                
Hedge Funds and Similar Investments(g)        63   63 
Private Equity and Other(h)        32   32 
             
Total $189  $308  $95  $592 
             
(a)See Note 43 — Fair Value for a description of levels within the fair value hierarchy.
(b)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category are obtained from quoted prices in actively traded markets or valuations from brokers or pricing services.
(c)This category comprises both actively and not actively managed portfolios that track the S&P 500 low cost equity index funds. Investments in this category are exchange-traded securities whereby unadjusted quote prices can be obtained. Exchange-traded securities held in a commingled fund are classified as Level 2 assets.
(d)This category represents portfolios of small and medium capitalization domestic equities. Investments in this category are exchange-traded securities whereby unadjusted quote prices can be obtained. Exchange-traded securities held in a commingled fund are classified as Level 2 assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category are exchange-traded securities whereby unadjusted quote prices can be obtained. Exchange-traded securities held in a commingled fund are classified as Level 2 assets.
(f)This category includes corporate bonds from diversified industries, U.S. Treasuries, and mortgage backed securities. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services. Non-exchange traded securities and exchange-traded securities held in commingled funds are classified as Level 2 assets.
(g)This category includesutilizes a diversified group of funds and strategies that attempt to capture financial market inefficiencies. In 2009, pricinginefficiencies and includes publicly traded debt and equity, publicly traded mutual funds, commingled and limited partnership funds and non-exchange traded securities. Pricing for investments in this category was based on limited observable inputs as there was little, if any, publicly available pricing. Valuations forLevel 1 and level 2 assets in this category may be based on relevant publicly-traded securities, derivatives, and privately-traded securities. In 2010, pricing for investments in this category includedis obtained from quoted prices in activeactively traded markets and quotationsquoted prices from broker or pricing services. Non-exchangedNon-exchange traded securities held in commingled funds are classified as Level 2 assets. Valuations for some Level 3 assets in this category may be based on limited observable inputs as there may be little, if any, publicly available pricing.
(h)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in timber and private mezzanine debt. Pricing for investments in this category is based on limited observable inputs as there is little, if any, publicly available pricing. Valuations for assets in this category may be based on discounted cash flow analyses, relativerelevant publicly-traded comparables and comparable transactions.
The VEBA trusts hold debt and equity securities directly and indirectly through commingled funds and institutional mutual funds. Exchange-traded debt and equity securities held directly are valued using quoted market prices in actively traded markets. The commingled funds and institutional mutual funds which hold exchange-traded equity or debt securities are valued based on underlying securities, using quoted prices in actively traded markets. Non-exchange traded fixed income securities are valued by the trustee based upon quotations available from brokers or pricing services. A primary price source is identified by asset type, class or issue for each security. The trustees monitor prices supplied by pricing services and may use a supplemental price source or change the primary price source of a given security if the trustees challenge an assigned price and determine that another price source is considered to be preferable. Detroit Edison has obtained an understanding of how these prices are

57


derived, including

59


the nature and observability of the inputs used in deriving such prices. Additionally, Detroit Edison selectively corroborates the fair values of securities by comparison of market-based price sources.
Fair Value Measurements Using Significant Unobservable Inputs (Level 3):
             
  HedgeFunds Similar  Private Equity and    
(in Millions) Investments  Other  Total 
Beginning Balance at January 1, 2010 $63  $32  $95 
Total realized/unrealized gains (losses)  7   6   13 
Purchases, sales and settlements  (18)  (2)  (20)
          
Ending Balance at December 31, 2010 $52  $36  $88 
          
             
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period $4  $5  $9 
          
             
  HedgeFunds Similar  Private Equity and    
(in Millions) Investments  Other  Total 
Beginning Balance at January 1, 2009 $52  $26  $78 
Total realized/unrealized gains (losses)  4   3   7 
Purchases, sales and settlements  7   3   10 
          
Ending Balance at December 31, 2009 $63  $32  $95 
          
             
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period $4  $2  $6 
          
(in Millions)Hedge Funds and Similar Investments Private Equity and Other Total
Beginning Balance at January 1, 2011$52
 $36
 $88
Total realized/unrealized gains (losses):    

Realized gains (losses)(1) 1
 
Unrealized gains (losses)2
 (14) (12)
Purchases, sales and settlements:    
Purchases45
 31
 76
Sales(35) (15) (50)
Settlements
 
 
Ending Balance at December 31, 2011$63
 $39
 $102
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period$3
 $(11) $(8)

(in Millions)Hedge Funds and Similar Investments Private Equity and Other Total
Beginning Balance at January 1, 2010$63
 $32
 $95
Total realized/unrealized gains (losses)7
 6
 13
Purchases, sales and settlements(18) (2) (20)
Ending Balance at December 31, 2010$52
 $36
 $88
The amount of total gains (losses) for the period attributable to the change in unrealized gains or losses related to assets still held at the end of the period$4
 $5
 $9

There were no transfers between Level 3 and Level 2 and there were no significant transfers between Level 2 and Level 1 in the years ended December 31, 2011 and 2010.
Healthcare Legislation
In March 2010, the PPACAPatient Protection and Affordable Care Act of 2010 and the HCERAHealth Care and Education Reconciliation Act of 2010 were enacted into law (collectively, the “Act”). The Act is a comprehensive health care reform bill. A provision of the PPACAAct repeals the current rule permitting deduction of the portion of the drug coverage expense that is offset by the Medicare Part D subsidy, effective for taxable years beginning after December 31, 2012.
Detroit Edison’s retiree healthcare plan includes the provision of postretirement prescription drug coverage (“coverage”) which is included in the calculation of the recorded other postemployment benefit (OPEB) obligation. Because the Company’s coverage meets certain criteria, Detroit Edison is eligible to receive the Medicare Part D subsidy. With the enactment of the Act, the subsidy will continue to not be subject to tax, but an equal amount of prescription drug coverage expenditures will not be deductible. Income tax accounting rules require the impact of a change in tax law be recognized in continuing operations in the Consolidated Statements of Operations in the period that the tax law change is enacted.
This change in tax law required a remeasurement of the Deferred Tax Assettax asset related to the OPEB obligation and the Deferred Tax Liabilitytax liability related to the OPEB Regulatory Asset.asset in 2010. The net impact of the remeasurement iswas $18 million and has been deferred as a Regulatory Assetasset as the traditional rate setting process allows for the recovery of income tax costs.
In December 2003, the Medicare Act was signed into law which provides for a non-taxable federal subsidy to sponsors of retiree health care benefit plans that provide a benefit that is at least “actuarially equivalent” to the benefit established by law. The effects of the subsidy reduced net periodic postretirement benefit costs by $5 million in 2011, $5 million in 2010 and $17 million in 2009 and $11 million in 2008.2009. At December 31, 2010,2011, the gross amount of federal subsidies expected to be received in each of the next two years is estimated to be $5 million in 2011 and $6 million in 2012.

60



58


NOTE 1817 — SUPPLEMENTAL CASH FLOW INFORMATION
A detailed analysis of the changes in assets and liabilities that are reported in the Consolidated Statements of Cash Flows follows:
             
(in Millions) 2010  2009  2008 
Changes in Assets and Liabilities, Exclusive of Changes Shown Separately
            
Accounts receivable, net $  $16  $72 
Inventories  (71)  30   (24)
Recoverable pension and postretirement costs  (26)  (13)  (852)
Accrued pension liability — affiliates  (27)  9   598 
Accounts payable  47   (56)  (82)
Income taxes payable  (77)  (109)  (29)
Accrued postretirement liability — affiliates  3   (17)  259 
Other assets  (131)  (5)  58 
Other liabilities  29   106   118 
          
  $(253) $(39) $118 
          

(in Millions)2011 2010 2009
Changes in Assets and Liabilities, Exclusive of Changes Shown Separately     
Accounts receivable, net$(62) $
 $16
Inventories(53) (71) 30
Recoverable pension and postretirement costs(436) (26) (13)
Accrued pension liability — affiliates271
 (27) 9
Accounts payable41
 47
 (56)
Income taxes payable/receivable54
 (77) (109)
Accrued postretirement liability — affiliates157
 3
 (17)
Other assets(98) (131) (5)
Other liabilities(15) 29
 106
 $(141) $(253) $(39)

Supplementary cash and non-cash information for the years ended December 31 were as follows:
             
(in Millions) 2010  2009  2008 
Cash Paid For            
Interest (excluding interest capitalized) $315  $328  $290 
Income taxes  28   319   24 

61


(in Millions)2011 2010 2009
Cash Paid (Received) For:     
Interest (excluding interest capitalized)$294
 $315
 $328
Income taxes(18) 28
 319
NOTE 1918 — RELATED PARTY TRANSACTIONS
The Company has agreements with affiliated companies to sell energy for resale, purchase power, provide fuel supply services, and provide power plant operation and maintenance services. The Company has agreements with certain DTE Energy affiliates where we charge them for their use of the shared capital assets of the Company. A shared services company accumulates various corporate support services expenses and charges various subsidiaries of DTE Energy, including Detroit Edison.
The following is a summary of transactions with affiliated companies:
             
(in Millions) 2010 2009 2008
Revenues
            
Energy sales $1  $1  $ 
Other services  7   4   6 
Shared capital assets  29   28   23 
Costs
            
Fuel and power purchases  4   3   5 
Other services and interest  2   3   7 
Corporate expenses (net)  294   313   388 
Other
            
Dividends declared  305   305   228 
Dividends paid  305   305   305 
Capital contribution     250   175 

         
  December 31,
(in Millions) 2010 2009
Assets
        
Accounts receivable $8  $3 
Notes receivable  103   82 
Liabilities & Equity
        
Accounts payable  50   74 
Other liabilities        
Accrued pension liability  960   987 
Accrued postretirement liability  1,060   1,058 
(in Millions)2011 2010 2009
Revenues     
Energy sales$1
 $1
 $1
Other services4
 7
 4
Shared capital assets30
 29
 28
Costs 
  
  
Fuel and power purchases1
 4
 3
Other services and interest2
 2
 3
Corporate expenses (net)304
 294
 313
Other 
  
  
Dividends declared305
 305
 305
Dividends paid305
 305
 305
Capital contribution
 
 250


59

Table of Contents

 December 31,
(in Millions)2011 2010
Assets   
Accounts receivable$61
 $8
Notes receivable26
 103
Liabilities & Equity   
Accounts payable67
 50
Short-term borrowing64
 
Other liabilities 
  
Accrued pension liability1,231
 960
Accrued postretirement liability1,217
 1,060

Our accounts receivable from affiliated companies and accounts payable to affiliated companies are payable upon demand and are generally settled in cash within a monthly business cycle.
NOTE 2019 — SUPPLEMENTARY QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
                     
  First Second Third Fourth  
(in Millions) Quarter Quarter Quarter Quarter Year
2010
                    
Operating Revenues $1,146  $1,208  $1,444  $1,195  $4,993 
Operating Income  226   221   351   230   1,028 
Net Income  91   87   165   98   441 
                     
2009                    
Operating Revenues  1,118   1,108   1,289   1,199   4,714 
Operating Income  214   189   318   178   899 
Net Income  78   79   149   70   376 

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 First Second Third Fourth  
(in Millions)Quarter Quarter Quarter Quarter Year
2011         
Operating Revenues$1,192 $1,240 $1,517 $1,203 $5,152
Operating Income205 235 335 227 1,002
Net Income85 104 158 90 437
2010         
Operating Revenues1,146 1,208 1,444 1,195 4,993
Operating Income226 221 351 230 1,028
Net Income91 87 165 98 441

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Table of Contents

Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
None.

Item 9A.Controls and Procedures
See Item 8. Financial Statements and Supplementary Data for management’s evaluation of disclosure controls and procedures, its report on internal control over financial reporting, and its conclusion on changes in internal control over financial reporting.

Item 9B.Other Information
Item 9B.Other Information
None.
Part III

Item 10.Directors, Executive Officers and Corporate Governance

Item 11.Executive Compensation

Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Item 13.Certain Relationships and Related Transactions, and Director Independence
All omitted per General Instruction I (2) (c) of Form 10-K for wholly owned subsidiaries (reduced disclosure format).

Item 14.Principal Accountant Fees and Services
For the years ended December 31, 20102011 and December 31, 20092010 professional services were performed by PricewaterhouseCoopers LLP (PwC). The following table presents fees for professional services rendered by PwC for the audit of Detroit Edison’s annual financial statements for the years ended December 31, 20102011 and December 31, 2009,2010, respectively, and fees billed for other services rendered by PwC during those periods.
         
  2010  2009 
Audit fees (1) $1,217,885  $1,231,865 
Audit-related fees (2)  37,000   37,400 
All other fees (3)  410,498   100,000 
       
Total $1,665,383  $1,369,265 
       

 2011 2010
Audit fees (1)$1,144,625
 $1,217,885
Audit-related fees (2)36,250
 37,000
All other fees (3)210,000
 410,498
Total$1,390,875
 $1,665,383

(1)Represents the aggregate fees for the audits of Detroit Edison’s annual financial statements included in the Annual Reports on Form 10-K and for the reviews of the financial statements included in the Quarterly Reports on Form 10-Q.
(2)Represents the aggregate fees billed for audit-related services for various attest services.
(3)Represents consulting services for the purpose of providing advice and recommendations.
The above listed fees were pre-approved by the DTE Energy audit committee. Prior to engagement, the DTE Energy audit committee pre-approves these services by category of service. The DTE Energy audit committee may delegate to the chair of the audit committee, or to one or more other designated members of the audit committee, the authority to grant pre-approvals of all permitted services or classes of these permitted services to be provided by the independent auditor up to but not exceeding a pre-defined limit. The decision of the designated member to pre-approve a permitted service will be reported to the DTE Energy audit committee at the next scheduled meeting.

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61



Part IV

Item 15.Exhibits and Financial Statement Schedules
(a) The following documents are filed as part of this Annual Report on Form 10-K.
(1) Consolidated financial statements. See “Item 8 — Financial Statements and Supplementary Data.”
(2) Financial statement schedule. See “Item 8 — Financial Statements and Supplementary Data.”
(3) Exhibits.
(i)Exhibits filed herewith.
(i)  Exhibits filed herewith.
4-273Supplemental Indenture, dated as of December 1, 2010 to the Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee. (2010 Series CT)
12-3912-42 Computation of Ratio of Earnings to Fixed Charges.
   
23-2423-26 Consent of PricewaterhouseCoopers LLP.
   
23-25Consent of Deloitte & Touche LLP.
31-6131-71 Chief Executive Officer Section 302 Form 10-K Certification of Periodic Report.
   
31-6231-72 Chief Financial Officer Section 302 Form 10-K Certification of Periodic Report.
(ii)Exhibits incorporated herein by reference.
(ii)  Exhibits incorporated herein by reference.
3(a) Restated Articles of Incorporation of The Detroit Edison Company, as filed December 10, 1991. (Exhibit 3-13 to Form 10-Q for the quarter ended June 30, 1999).
   
3(b) Bylaws of The Detroit Edison Company, as amended through September 22, 1999. (Exhibit 3-14 to Form 10-Q for the quarter ended September 30, 1999).
   
4(a) Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit B-1 to Registration Statement on Form A-2 (File No. 2-1630)) and indentures supplemental thereto, dated as of dates indicated below, and filed as exhibits to the filings set forth below:
   
  Supplemental Indenture, dated as of December 1, 1940, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit B-14 to Registration Statement on Form A-2 (File No. 2-4609)). (amendment)
   
  Supplemental Indenture, dated as of September 1, 1947, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit B-20 to Registration Statement on Form S-1 (File No. 2-7136)). (amendment)
   
  Supplemental Indenture, dated as of March 1, 1950, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit B-22 to Registration Statement on Form S-1 (File No. 2-8290)). (amendment)
   
  Supplemental Indenture, dated as of November 15, 1951, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit B-23 to Registration Statement on Form S-1 (File No. 2-9226)). (amendment)
   
  Supplemental Indenture, dated as of August 15, 1957, to the Mortgage and Deed of Trust, dated as

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of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 3-B-30 to Form 8-K dated September 11, 1957). (amendment)
   
  Supplemental Indenture, dated as of December 1, 1966, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 2-B-32 to Registration Statement on Form S-9 (File No. 2-25664)). (amendment)

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Supplemental Indenture, dated as of February 15, 1990, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-212 to Form 10-K for the year ended December 31, 2000). (1990 Series B, C, E and F)


Supplemental Indenture, dated as of May 1, 1991, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-178 to Form 10-K for the year ended December 31, 1996). (1991 Series BP and CP)
   
  Supplemental Indenture, dated as of May 15, 1991, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-179 to Form 10-K for the year ended December 31, 1996). (1991 Series DP)
   
  Supplemental Indenture, dated as of February 29, 1992, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-187 to Form 10-Q for the quarter ended March 31, 1998). (1992 Series AP)
   
  Supplemental Indenture, dated as of April 26, 1993, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-215 to Form 10-K for the year ended December 31, 2000). (amendment)
   
  Supplemental Indenture, dated as of August 1, 1999, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-204 to Form 10-Q for the quarter ended September 30, 1999). (1999 Series AP, BP and CP)
Supplemental Indenture, dated as of August 1, 2000, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-210 to Form 10-Q for the quarter ended September 30, 2000). (2000 Series BP)
   
Supplemental Indenture, dated as of August 15, 2001, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-227 to Form 10-Q for the quarter ended September 30, 2001). (2001 Series CP)

65


  Supplemental Indenture, dated as of September 17, 2002, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.1 to Registration Statement on Form S-3 (File No. 333-100000)). (amendment and successor trustee)
   
  Supplemental Indenture, dated as of October 15, 2002, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-230 to Form 10-Q for the quarter ended September 30, 2002). (2002 Series A and B)
   
  Supplemental Indenture, dated as of December 1, 2002, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-232 to Form 10-K for the year ended December 31, 2002). (2002 Series C and D)
   
  Supplemental Indenture, dated as of August 1, 2003, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-235 to Form 10-Q for the quarter ended September 30, 2003). (2003 Series A)
   
  Supplemental Indenture, dated as of March 15, 2004, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-238 to Form 10-Q for the quarter ended March 31, 2004). (2004 Series A and B)
   
  Supplemental Indenture, dated as of July 1, 2004, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-240 to Form 10-Q for the quarter ended June 30, 2004). (2004 Series D)
   
  Supplemental Indenture, dated as of April 1, 2005, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between Detroit Edison and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.3 to Registration Statement on Form S-4 (File No. 333-123926)). (2005 Series AR and BR)
   
  Supplemental Indenture, dated as of September 15, 2005, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.2 to Form 8-K dated September 29, 2005). (2005 Series C)

63


   
  Supplemental Indenture, dated as of September 30, 2005, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between Detroit Edison and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-248 to Form 10-Q for the quarter ended September 30, 2005). (2005 Series E)
   
  Supplemental Indenture, dated as of May 15, 2006, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-250 to Form 10-Q for the quarter ended June 30, 2006). (2006 Series A)
   
  Supplemental Indenture, dated as of December 1, 2007, to the Mortgage and Deed of Trust, dated as of October 1, 1924, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.2 to Form 8-K dated December 18, 2007). (2007 Series A)
   
  Supplemental Indenture, dated as of May 1, 2008 to Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-253 to Form 10-Q for the quarter ended June 30, 2008). (2008 Series ET)

66


  Supplemental Indenture, dated as of June 1, 2008 to Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-255 to Form 10-Q for the quarter ended June 30, 2008). (2008 Series G)
   
  Supplemental Indenture, dated as of July 1, 2008 to Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-257 to Form 10-Q for the quarter ended June 30, 2008). (2008 Series KT)
   
  Supplemental Indenture, dated as of October 1, 2008 to Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-259 to Form 10-Q for the quarter ended September 30, 2008). (2008 Series J)
   
  Supplemental Indenture, dated as of December 1, 2008 to Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee, providing for General and Refunding Mortgage Bonds. (Exhibit 4-261 to Form 10-K for the year ended December 31, 2008). (2008 Series LT)
   
  Supplemental Indenture, dated as of March 15, 2009 to Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company N.A., as successor trustee (Exhibit 4-263 to Form 10-Q for the quarter ended March 31, 2009). (2009 Series BT)
   
  Supplemental Indenture, dated as of November 1, 2009 to the Mortgage and Deed of Trust dated as of October 1, 1924 between The Detroit Edison Company and The Bank of New York Mellon Trust Company N.A., as successor trustee. (Exhibit 4-267 to Form 10-K for the year ended December 31, 2009). (2009 Series CT)
   
  Supplemental Indenture, dated as of August 1, 2010, to the Mortgage and Deed of Trust, dated as of October 1, 1924, by and between theThe Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee. (Exhibit 4-269 to Form 10-Q for the quarter ended September 30, 2010). (2010 Series B)
   
  Supplemental Indenture, dated as of September 1, 2010, to the Mortgage and Deed of Trust, dated as of October 1, 1924, by and between theThe Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee. (Exhibit 4-271 to Form 10-Q for the quarter ended September 30, 2010). (2010 Series A)
   
4(b)
Supplemental Indenture, dated as of December 1, 2010, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-273 to Form 10-K for the year ended December 31, 2010). (2010 Series CT)




64


Supplemental Indenture, dated as of March 1, 2011, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee (Exhibit 4-274 to Form 10-Q for the quarter ended March 31, 2011). (2011 Series AT) 



Supplemental Indenture, dated as of May 15, 2011, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee (Exhibit 4-275 to Form 10-Q for the quarter ended June 30, 2011). (2011 Series B)


Supplemental Indenture, dated as of August 1, 2011, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee (Exhibit 4-276 to Form 10-Q for the quarter ended September 30, 2011). (2011 Series GT)

Supplemental Indenture, dated as of August 15, 2011, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee (Exhibit 4-277 to Form 10-Q for the quarter ended September 30, 2011). (2011 Series D, 2011 Series E, 2011 Series F)

Supplemental Indenture, dated as of September 1, 2011, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee (Exhibit 4-278 to Form 10-Q for the quarter ended September 30, 2011). (2011 Series H)
 Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-152 to Registration Statement on Form S-3 (File No. 33-50325)).
   
  Tenth Supplemental Indenture, dated as of October 23, 2002, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-231 to Form 10-Q for the quarter ended September 30, 2002). (5.20% Senior Notes due 2012 and 6.35% Senior Notes due 2032)
   
  Eleventh Supplemental Indenture, dated as of December 1, 2002, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-233 to Form 10-Q for the quarter ended March 31, 2003). (5.45% Senior Notes due 2032 and 5.25% Senior Notes due 2032)
   
  Twelfth Supplemental Indenture, dated as of August 1, 2003, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-236 to Form 10-Q for the quarter ended September 30, 2003). (5 1/2% Senior Notes due 2030)

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  Thirteenth Supplemental Indenture, dated as of April 1, 2004, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-237 to Form 10-Q for the quarter ended March 31, 2004). (4.875% Senior Notes Due 2029 and 4.65% Senior Notes due 2028)
   
  Fourteenth Supplemental Indenture, dated as of July 15, 2004, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-239 to Form 10-Q for the quarter ended June 30, 2004). (2004 Series D 5.40% Senior Notes due 2014)
   
  Sixteenth Supplemental Indenture, dated as of April 1, 2005, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.1 to Registration Statement on Form S-4 (File No. 333-123926)). (2005 Series AR 4.80% Senior Notes due 2015 and 2005 Series BR 5.45% Senior Notes due 2035)
   
  Eighteenth Supplemental Indenture, dated as of September 15, 2005, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.1 to Form 8-K dated September 29, 2005). (2005 Series C 5.19% Senior Notes due October 1, 2023)
   

65


  Nineteenth Supplemental Indenture, dated as of September 30, 2005, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-247 to Form 10-Q for the quarter ended September 30, 2005). (2005 Series E 5.70% Senior Notes due 2037)
   
  Twentieth Supplemental Indenture, dated as of May 15, 2006, to the Collateral Trust Indenture dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-249 to Form 10-Q for the quarter ended June 30, 2006). (2006 Series A Senior Notes due 2036)
   
  Twenty-Second Supplemental Indenture, dated as of December 1, 2007, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4.1 to Form 8-K dated December 18, 2007). (2007 Series A Senior Notes due 2038)
   
  Twenty-Fourth Supplemental Indenture, dated as of May 1, 2008, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-254 to Form 10-Q for the quarter ended June 30, 2008). (2008 Series ET Variable Rate Senior Notes due 2029)
   
  Amendment dated June 1, 2009 to the Twenty-fourth Supplemental Indenture, dated as of May 1, 2008 to the Collateral Trust Indenture, dated as of June 30, 1993 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. as successor trustee (2008 Series ET Variable Rate Senior Notes due 2029) (Exhibit 4-265 to Form 10-Q for the quarter ended June 30, 2009)
   
  Twenty-Fifth Supplemental Indenture, dated as of June 1, 2008, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-256 to Form 10-Q for the quarter ended June 30, 2008). (2008 Series G 5.60% Senior Notes due 2018)
   
  Twenty-Sixth Supplemental Indenture, dated as of July 1, 2008, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York Trust Company, N.A., as successor trustee (Exhibit 4-258 to Form 10-Q for the quarter ended June 30, 2008). (2008 Series KT Variable Rate Senior Notes due 2020)
   
  Amendment dated June 1, 2009 to the Twenty-sixthTwenty-Sixth Supplemental Indenture, dated as of July 1, 2008 to the Collateral Trust Indenture, dated as of June 30, 1993 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (2008 Series KT Variable Rate Senior Notes due 2020) (ExhibitExhibit 4-266 to Form 10-Q for the quarter ended June 30, 2009)

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  Twenty-Seventh Supplemental Indenture, dated as of October 1, 2008, to the Collateral Trust Indenture, dated as of June 30, 1993, between The Detroit Edison Company and The Bank of New York TrustMellon trust Company, N.A., as successor trustee (Exhibit 4-260 to Form 10-Q for the quarter ended September 30, 2008). (2008 Series J 6.40% Senior Notes due 2013)
   
  Twenty-Eighth Supplemental Indenture, dated as of December 1, 2008 to the Collateral Trust Indenture, dated as of June 30, 1993 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A. (Exhibit 4-262 to Detroit Edison’sEdison's Form 10-K for the year ended December 31, 2008). (2008 Series LT 6.75% Senior Notes due 2038)
   
  Twenty-Ninth Supplemental Indenture, dated as of March 15, 2009, to the Collateral Trust Indenture, dated as of June 30, 1993 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee (Exhibit 4-264 to Detroit Edison’sEdison's Form 10-Q for the quarter ended March 31, 2009). (2009 Series BT 6.00% Senior Notes due 2036)
   

66


  Thirtieth Supplemental Indenture, dated as of November 1, 2009 to the Collateral Trust Indenture, dated as of June 30, 1993 between The Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee. (Exhibit 4-268 to Form 10-K for the year ended December 31, 2009). (2009 Series CT Variable Rate Senior Notes due 2024).
   
  Thirty-First Supplemental Indenture, dated as of August 1, 2010 to the Collateral Trust Indenture, dated as of June 1, 1993 by and between theThe Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee. (Exhibit 4-270 to Form 10-Q for the quarter ended September 30, 2010.)2010). (2010 Series B 3.45% Senior Notes due 2020)
   
  Thirty-Second Supplemental Indenture, dated as of September 1, 2010, by and between theThe Detroit Edison Company and The Bank of New York Mellon Trust Company, N.A., as successor trustee. (Exhibit 4-272 to Form 10-Q for the quarter ended September 30, 2010.) (2010 Series A 4.89% Senior Notes due 2020)
   
4(c) Trust Agreement of Detroit Edison Trust I. (Exhibit 4.9 to Registration Statement on Form S-3 (File No. 333-100000)).
   
4(d) Trust Agreement of Detroit Edison Trust II. (Exhibit 4.10 to Registration Statement on Form S-3 (File No. 333-100000)).
   
10(a) Securitization Property Sales Agreement dated as of March 9, 2001, between The Detroit Edison Securitization Funding LLC and The Detroit Edison Company. (Exhibit 10-42 to Form 10-Q for the quarter ended March 31, 2001).
   
10(b) Certain arrangements pertaining to the employment of Anthony F. Earley, Jr. with The Detroit Edison Company, dated April 25, 1994. (Exhibit 10-53 to Form 10-Q for the quarter ended March 31, 1994).
   
10(c) Certain arrangements pertaining to the employment of Gerard M. Anderson with The Detroit Edison Company, dated October 6, 1993. (Exhibit 10-48 to Form 10-K for year ended December 31, 1993).
   
10(d) Certain arrangements pertaining to the employment of David E. Meador with The Detroit Edison Company, dated January 14, 1997. (Exhibit 10-5 to Form 10-K for the year ended December 31, 1996).
   
10(e) Amended and Restated Post-Employment Income Agreement, dated March 23, 1998, between The Detroit Edison Company and Anthony F. Earley, Jr. (Exhibit 10-21 to Form 10-Q for the quarter ended March 31, 1998).
   
10(f) The Detroit Edison Company Supplemental Long-Term Disability Plan, dated January 27, 1997. (Exhibit 10-4 to Form 10-K for the year ended December 31, 1996).
   
10(g) 
Form of Amended and Restated Detroit Edison Two-YearFive-Year Credit Agreement, dated as of April 29, 2009August 20, 2010 and amended and restated as of August 20, 2010,October 21, 2011, by and among The Detroit Edison Company, the lenders party thereto, Barclays Bank plc,PLC, as Administrative Agent, and Citibank, N.A., JPMorgan Chase Bank, N.A., and theThe Royal Bank of Scotland plc, as Co-Syndication Agents (Exhibit 10.1 to Detroit Edison Form 8-K filed on August 26, 2010).

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10(h)Form of Detroit Edison Three-Year Credit Agreement, dated as of August 20, 2010, by and among The Detroit Edison Company, the lenders party thereto, Barclays Bank plc, as Administrative Agent, and Citibank N.A., JPMorgan Chase Bank, N.A. and the Royal Bank of Scotland plc, as Co-Syndication Agents (Exhibit 10.2 to Detroit Edison Form 8-K filed on August 26, 2010)October 21, 2011).
   
99(a) Belle River Participation Agreement, dated as of December 1, 1982, between The Detroit Edison Company and Michigan Public Power Agency. (Exhibit 28-5 to Registration Statement No. 2-81501).
   
99(b) Belle River Transmission Ownership and Operating Agreement, dated as of December 1, 1982, between The Detroit Edison Company and Michigan Public Power Agency. (Exhibit 28-6 to Registration Statement No. 2-81501).








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iii.Exhibits furnished herewith.
(iii)  Exhibits furnished herewith.
32-6132-71 Chief Executive Officer Section 906 Form 10-K Certification of Periodic Report.
   
32-6232-72 Chief Financial Officer Section 906 Form 10-K Certification of Periodic Report.
101.INSXBRL Instance Document
101.SCHXBRL Taxonomy Extension Schema
101.CALXBRL Taxonomy Extension Calculation Linkbase
101.DEFXBRL Taxonomy Extension Definition Database
101.LABXBRL Taxonomy Extension Label Linkbase
101.PREXBRL Taxonomy Extension Presentation Linkbase

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The Detroit Edison Company
Schedule II — Valuation and Qualifying Accounts
             
  Year Ended December 31 
(in Millions) 2010  2009  2008 
Allowance for Doubtful Accounts (shown as deduction from Accounts Receivable in the Consolidated Statements of Financial Position)
            
Balance at Beginning of Period $118  $121  $93 
Additions:            
Charged to costs and expenses  57   62   81 
Charged to other accounts (1)  8   7   5 
Deductions (2)  (90)  (72)  (58)
          
Balance At End of Period $93  $118  $121 
          

 Year Ended December 31
(in Millions)2011 2010 2009
Allowance for Doubtful Accounts (shown as deduction from Accounts Receivable in the Consolidated Statements of Financial Position)     
Balance at Beginning of Period$93
 $118
 $121
Additions:     
Charged to costs and expenses47
 57
 62
Charged to other accounts (1)8
 8
 7
Deductions (2)(68) (90) (72)
Balance At End of Period$80
 $93
 $118

(1)Collection of accounts previously written off.
(2)Non-collectible accounts written off.

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Signatures
Pursuant to the requirements of Section 13 or 15 (d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

  

THE DETROIT EDISON COMPANY
(Registrant)
 
Date:February 18, 201116, 2012 By  /s/ GERARD M. ANDERSON   
  Gerard M. Anderson  
  
Chairman of the Board and
Chief Executive Officer 
 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the date indicated.

By /s/ GERARD M. ANDERSON By /s/ PETER B. OLEKSIAK
  Gerard M. Anderson   Peter B. Oleksiak
  Chairman of the Board and   Vice President, Controller and
  Chief Executive Officer   Chief Accounting Officer
       
By /s/ DAVID E. MEADOR By /s/ LISA A. MUSCHONG
  
David E. Meador   Lisa A. Muschong
  Director, Executive Vice President and Chief   Director
  Financial Officer    
       
By /s/ BRUCE D. PETERSON    
  
Bruce D. Peterson    
  Director    
Date: February 18, 201116, 2012

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