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SPR Spirit Aerosystems

Document and Entity Information

Document and Entity Information - shares3 Months Ended
Apr. 01, 2021Apr. 23, 2021
Cover [Abstract]
Security Exchange NameNYSE
Title of 12(b) SecurityClass A common stock, par value $0.01 per share
Entity Address, Postal Zip Code67210
City Area Code316
Local Phone Number526-9000
Entity Address, State or ProvinceKS
Entity Address, City or TownWichita
Entity Address, Address Line One3801 South Oliver
Entity Tax Identification Number20-2436320
Entity Incorporation, State or Country CodeDE
Entity File Number001-33160
Document Transition Reportfalse
Document Quarterly Reporttrue
Entity Registrant NameSpirit AeroSystems Holdings, Inc.
Entity Central Index Key0001364885
Document Type10-Q
Document Period End DateApr. 1,
2021
Document Fiscal Year Focus2021
Document Fiscal Period FocusQ1
Current Fiscal Year End Date--12-31
Entity Small Businessfalse
Entity Emerging Growth Companyfalse
Entity Current Reporting StatusYes
Entity Interactive Data CurrentYes
Entity Filer CategoryLarge Accelerated Filer
Amendment Flagfalse
Trading SymbolSPR
Entity Shell Companyfalse
Entity Common Stock, Shares Outstanding105,419,603

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Income Statement [Abstract]
Revenues $ 900.8 $ 1,077.3
Operating costs and expenses
Cost of sales958.8 1,112.5
Selling, general and administrative57.6 77.4
Restructuring Charges2.1 42.6
Research and development8.2 12.3
Total operating costs and expenses1,026.7 1,244.8
Operating loss(125.9)(167.5)
Interest expense and financing fee amortization(59.8)(32.2)
Other income (expense), net(12.8)49
Loss before income taxes and equity in net loss of affiliate(172.9)(248.7)
Income tax benefit1.7 87.2
Loss before equity in net loss of affiliate(171.2)(161.5)
Equity in net loss of affiliate(0.4)(1.5)
Net loss $ (171.6) $ (163)
Loss per share
Earnings Per Share, Basic $ (1.65) $ (1.57)
Diluted (in dollars per share) $ (1.65) $ (1.57)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Statement of Comprehensive Income [Abstract]
Net loss $ (171.6) $ (163)
Foreign currency translation adjustments6.4 (35.8)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax(4.9)(93.2)
Unrealized foreign exchange gain (loss) on intercompany loan, net of tax effect of ($0.2) and $0.9 for the three months ended, respectively0.5 (2.9)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax1.2 (9.8)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax0.9 0
Total other comprehensive gain (loss)4.1 (141.7)
Total comprehensive loss $ (167.5) $ (304.7)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Statement of Comprehensive Income [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax $ 0.1 $ 28.8
Unrealized exchange (loss) on intercompany loan, tax(0.2)0.9
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax(0.3)0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax $ 0 $ 3

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in MillionsApr. 01, 2021Dec. 31, 2020
Assets
Cash and cash equivalents $ 1,359.3 $ 1,873.3
Restricted Cash, Current0.3 0.3
Accounts receivable, net525.8 484.4
Unbilled Receivables, Current361.9 368.4
Inventory, net1,395.8 1,422.3
Other current assets344.5 336.3
Total current assets3,987.6 4,485
Property, plant and equipment, net2,457 2,503.8
Operating Lease, Right-of-Use Asset70 70.6
Unbilled Receivable, Non Current5.9 4.4
Pension assets466.8 455.9
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent0.3 0.1
Goodwill583.9 565.3
Intangible Assets, Net (Excluding Goodwill)207 215.2
Deferred income taxes89.3 83.6
Other assets7,867.8 8,383.9
Liabilities, Current [Abstract]
Accounts Payable, Current540.8 558.9
Accrued Liabilities, Current383.3 365.6
Deferred Compensation Liability, Current14.9 57
Long-term Debt and Lease Obligation, Current40.2 340.7
Operating Lease, Liability, Current5.5 5.5
Customer Advances, Current53.1 18.9
Billings in Excess of Cost, Current119.3 97.6
Provision for Loss on Contracts244.5 184.6
Deferred Revenue, Current15 22.2
Other Liabilities, Current71.4 58.4
Liabilities Noncurrent
Long-term debt3,525.2 3,532.9
Operating Lease, Liability, Noncurrent66.6 66.6
Advance payments, long-term289.9 327.4
Pension/OPEB obligation431.8 440.2
Billings in Excess of Cost, Noncurrent348.5 372
Provision for Loss on Contacts, Non Current509.1 561.4
Deferred grant income liability - non-current27.9 28.1
Deferred revenue and other deferred credits38 38.9
Deferred income taxes438.9 437
Deferred Tax Liabilities, Net, Noncurrent10.9 13
Additional Paid in Capital [Abstract]
Additional paid-in capital1,144.4 1,139.8
AccumulatedOtherComprehensiveIncomeLossNetOfTaxAbstract
Accumulated other comprehensive loss(150)(154.1)
Retained Earnings Accumulated Deficit [Abstract]
Retained earnings $ 2,153.7 $ 2,326.4
Treasury Stock, Shares41,523,470 41,523,470
Treasury Stock, Value $ (2,456.7) $ (2,456.7)
Total stockholders' equity692.5 856.5
Noncontrolling interest0.5 0.5
Total equity693 857
Total liabilities and equity7,867.8 8,383.9
Liabilities, Current1,488 1,709.4
Class A [Member]
Stockholders' Equity Attributable to Parent [Abstract]
Common stock $ 1.1 $ 1.1
Retained Earnings Accumulated Deficit [Abstract]
Common Stock, Shares Authorized200,000,000 200,000,000
Class B [Member]
Retained Earnings Accumulated Deficit [Abstract]
Common Stock, Shares Authorized150,000,000 150,000,000

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / sharesApr. 01, 2021Dec. 31, 2020
Shareholders' equity
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized10,000,000 10,000,000
Preferred stock, shares issued0 0
Treasury Stock, Shares41,523,470 41,523,470
Class A [Member]
Shareholders' equity
Common stock, shares authorized200,000,000 200,000,000
Common stock, shares issued105,438,110 105,542,162
Class B [Member]
Shareholders' equity
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized150,000,000 150,000,000
Common stock, shares issued0 0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Operating activities
Net loss $ (171.6) $ (163)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization expense80.3 67.3
Amortization of deferred financing fees2.3 1.9
Accretion of customer supply agreement0.6 1.1
Employee Benefit and Share-based Payment Arrangement, Noncash6.6 9.8
Loss on Derivative Instruments, Pretax(0.1)0
Loss (gain) from foreign currency transactions7.2 (6.5)
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property(0.3)(0.2)
Deferred taxes(0.9)(61.5)
Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits(15.2)59.9
Grant liability amortization(0.4)(2.4)
Unrealized Gain (Loss) on Investments0.4 0
Increase (Decrease) in Forward Provision(3.5)(9)
Changes in assets and liabilities
Accounts receivable, net(38.3)36.1
Inventory, net23.1 (59.4)
Increase (Decrease) in Unbilled Receivables5.6 144.5
Accounts payable and accrued liabilities(6.4)(278.6)
Profit sharing/deferred compensation(42.6)(66.7)
Advance payments(0.8)(19.8)
Income taxes receivable/payable3.6 (32.8)
Increase (Decrease) in Billing in Excess of Cost of Earnings(1.7)39.1
Other(16.8)8.5
Net cash used in operating activities(170.2)(331.3)
Investing activities
Purchase of property, plant and equipment(27.6)(31)
Payments to Acquire Businesses, Net of Cash Acquired0 (118.1)
Payments for (Proceeds from) Other Investing Activities1.2 0.3
Net cash used in investing activities(26.4)(147.3)
Financing activities
Proceeds from (Repayments of) Other Debt(2.5)10
Principal payments of debt(9.8)(7.3)
Repayments of Debt(1)(5.7)
Repayments of Lines of Credit(300)0
Payment, Tax Withholding, Share-based Payment Arrangement(3.3)(13.1)
Proceeds from Stock Plans1.4 1.3
Debt issuance and financing costs0 (4.8)
Payments of Dividends(1.1)(12.4)
Proceeds from (Payments for) Other Financing Activities(0.1)0
Net cash used in financing activities(316.4)(32)
Effect of exchange rate changes on cash and cash equivalents(1)(6.2)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect(514)(516.8)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning Balance1,893.1 2,367.2
Cash, cash equivalents, and restricted cash, end of period1,379.1 1,850.4
Cash and Cash Equivalents, at Carrying Value, Ending Balance1,359.3 1,833.6
Reconciliation of Cash, Cash Equivalents, and Restricted Cash [Abstract]
Restricted Cash, Current0.3 0.3
Restricted Cash, Noncurrent19.5 16.5
Increase (Decrease) in Income Taxes Payable3.6 (32.8)
Increase (Decrease) in Accrued Taxes Payable(1.9)0
Payments to Acquire Businesses, Net of Cash Acquired0 118.1
Payments to Acquire Equity Method Investments $ 0 $ 1.5

Condensed Statement of Changes

Condensed Statement of Changes in Stockholders' Equity Statement - USD ($) $ in MillionsTotalClass A [Member]Common Stock [Member]Additional Paid-in Capital [Member]Retained Earnings [Member]Treasury Stock, Common [Member]AOCI Including Portion Attributable to Noncontrolling Interest [Member]Stockholders' Equity, Total [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2019 $ 1,761.4
Common Stock, Shares, Outstanding at Dec. 31, 2019104,882,379
Common Stock, Value, Outstanding at Dec. 31, 2019 $ 1.1
Additional Paid in Capital, Common Stock at Dec. 31, 2019 $ 1,125
Treasury Stock, Value at Dec. 31, 2019 $ (2,456.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax at Dec. 31, 2019 $ (109.2)
Retained Earnings (Accumulated Deficit) at Dec. 31, 2019 $ 3,201.3
Common Stock, Dividends, Per Share, Declared $ 0.01
Net Income (Loss) Attributable to Parent $ (163)(163)(163)
Dividends, Common Stock, Cash(1.4)(1.4)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross736,078
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 0
Stock Issued During Period, Value, Restricted Stock Award, Gross12.3 12.3
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited(83,998)
Shares Granted, Value, Share-based Payment Arrangement, Forfeited $ 0
Payment, Tax Withholding, Share-based Payment Arrangement13.1 $ 0 (13)(13)
Stock Issued During Period, Shares, Employee Stock Purchase Plans55,977
Stock Issued During Period, Value, Employee Stock Purchase Plan1.3 1.3
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation(190,581)
Other Comprehensive Income (Loss), Net of Tax(141.7)(141.7)(141.7)
Stockholders' Equity Attributable to Parent at Apr. 02, 20201,455.9
Common Stock, Shares, Outstanding at Apr. 02, 2020105,399,855
Additional Paid in Capital, Common Stock at Apr. 02, 20201,125.6
Treasury Stock, Value at Apr. 02, 2020(2,456.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax at Apr. 02, 2020(250.9)
Retained Earnings (Accumulated Deficit) at Apr. 02, 20203,036.9
Common Stock, Value, Outstanding at Apr. 02, 2020 $ 1.1
Stockholders' Equity Attributable to Parent at Dec. 31, 2020856.5 856.5
Common Stock, Shares, Outstanding at Dec. 31, 2020105,542,162
Common Stock, Value, Outstanding at Dec. 31, 2020 $ 1.1 $ 1.1
Additional Paid in Capital, Common Stock at Dec. 31, 20201,139.8 1,139.8
Treasury Stock, Value at Dec. 31, 20202,456.7 (2,456.7)
Accumulated Other Comprehensive Income (Loss), Net of Tax at Dec. 31, 2020(154.1)(154.1)
Retained Earnings (Accumulated Deficit) at Dec. 31, 2020 $ 2,326.4 2,326.4
Common Stock, Dividends, Per Share, Declared $ 0.01
Net Income (Loss) Attributable to Parent $ (171.6)(171.6)(171.6)
Dividends, Common Stock, Cash(1.1)(1.1)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross30,024
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture $ 0
Stock Issued During Period, Value, Restricted Stock Award, Gross6.5 6.5
Shares Issued, Shares, Share-based Payment Arrangement, Forfeited(94,820)
Shares Granted, Value, Share-based Payment Arrangement, Forfeited $ 0
Payment, Tax Withholding, Share-based Payment Arrangement3.3 $ 0 (3.3)(3.3)
Stock Issued During Period, Shares, Employee Stock Purchase Plans29,500
Stock Issued During Period, Value, Employee Stock Purchase Plan1.4 1.4
Supplemental Retirement Plan Shares Issued9,198
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation(77,954)
Other Comprehensive Income (Loss), Net of Tax4.1 4.1 4.1
Stockholders' Equity Attributable to Parent at Apr. 01, 2021692.5 692.5
Common Stock, Shares, Outstanding at Apr. 01, 2021105,438,110
Additional Paid in Capital, Common Stock at Apr. 01, 20211,144.4 1,144.4
Treasury Stock, Value at Apr. 01, 20212,456.7 $ (2,456.7)
Accumulated Other Comprehensive Income (Loss), Net of Tax at Apr. 01, 2021(150) $ (150)
Retained Earnings (Accumulated Deficit) at Apr. 01, 2021 $ 2,153.7 $ 2,153.7
Common Stock, Value, Outstanding at Apr. 01, 2021 $ 1.1
Supplemental Retirement Plan Shares Issued Value $ 0 $ 0

Organization and Basis of Inter

Organization and Basis of Interim Presentation3 Months Ended
Apr. 01, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Interim PresentationOrganization, Basis of Interim Presentation and Recent Developments Unless the context otherwise indicates or requires, as used in this Quarterly Report, references to “we,” “us,” “our,” and the “Company” refer to Spirit AeroSystems Holdings, Inc. and its consolidated subsidiaries. References to “Spirit” refer only to our subsidiary, Spirit AeroSystems, Inc., and references to “Spirit Holdings” or “Holdings” refer only to Spirit AeroSystems Holdings, Inc. The Company provides manufacturing and design expertise in a wide range of fuselage, propulsion, and wing products and services for aircraft original equipment manufacturers (“OEM”) and operators through its subsidiaries including Spirit. The Company's headquarters are in Wichita, Kansas, with manufacturing and assembly facilities in Tulsa and McAlester, Oklahoma; Prestwick, Scotland; Wichita, Kansas; Kinston, North Carolina; Subang, Malaysia; Saint-Nazaire, France; San Antonio, Texas; Biddeford, Maine; Casablanca, Morocco; Belfast, Northern Ireland; and Dallas, Texas. Spirit has previously announced site consolidation activities, including the McAlester, Oklahoma and San Antonio, Texas sites. The work transfer and closure activities for these sites are planned to primarily take place over the first half of 2021. The accompanying unaudited interim condensed consolidated financial statements include the Company’s financial statements and the financial statements of its majority-owned or controlled subsidiaries and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and the instructions to Form 10-Q and Article 10 of Regulation S-X. The Company’s fiscal quarters are 13 weeks in length. Since the Company’s fiscal year ends on December 31, the number of days in the Company’s first and fourth quarters varies slightly from year to year. All intercompany balances and transactions have been eliminated in consolidation. As part of the monthly consolidation process, the Company’s international subsidiaries that have functional currencies other than the U.S. dollar are translated to U.S. dollars using the end-of-month translation rate for balance sheet accounts and average period currency translation rates for revenue and income accounts. The subsidiaries in Prestwick, Scotland and Subang, Malaysia use the British pound as their functional currency. All other foreign subsidiaries and branches use the U.S. dollar as their functional currency. In the opinion of management, the accompanying unaudited interim condensed consolidated financial statements contain all adjustments (consisting of normal recurring adjustments and elimination of intercompany balances and transactions) considered necessary to fairly present the results of operations for the interim period. The results of operations for the three months ended April 1, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. In connection with the preparation of the condensed consolidated financial statements, the Company evaluated subsequent events through the date the financial statements were issued. The interim financial statements should be read in conjunction with the audited consolidated financial statements, including the notes thereto, included in the Company’s 2020 Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 25, 2021 (the “2020 Form 10-K”). The Company's significant accounting policies are described in Note 3, Summary of Significant Accounting Policies to our consolidated financial statements in the 2020 Form 10-K. COVID-19 During the three months ended April 1, 2021, the COVID-19 pandemic continued to have a significant negative impact on the aviation industry, our customers, and our business globally. The length of the COVID-19 pandemic and its impact on the aviation industry and the Company’s operational and financial performance remains uncertain and outside of the Company’s control. The Company expects the pandemic and its effects to continue to have a significant negative impact on its business for the duration of the pandemic and during the subsequent economic recovery, which could be for an extended period of time. B737 MAX Boeing's deliveries of the B737 MAX resumed in the fourth quarter of 2020 when the FAA rescinded the order that grounded B737 MAX aircraft in the United States. Regulators from Brazil, Canada, the EU and U.K. have taken similar actions

Changes in Estimates

Changes in Estimates3 Months Ended
Apr. 01, 2021
Changes in Estimates [Abstract]
Change In Estimate [Text Block]. Changes in Estimates The Company has a periodic forecasting process in which management assesses the progress and performance of the Company’s programs. This process requires management to review each program’s progress by evaluating the program schedule, changes to identified risks and opportunities, changes to estimated revenues and costs for the accounting contracts (and options if applicable), and any outstanding contract matters. Risks and opportunities include but are not limited to management’s judgment about the cost associated with the Company’s ability to achieve the schedule, technical requirements (e.g., a newly-developed product versus a mature product), and any other program requirements. Due to the span of years it may take to completely satisfy the performance obligations for the accounting contracts (and options, if any) and the scope and nature of the work required to be performed on those contracts, the estimation of total revenue and costs is subject to many variables and, accordingly, is subject to change based upon judgment. When adjustments in estimated total consideration or estimated total cost are required, any changes from prior estimates for fully satisfied performance obligations are recognized in the current period as a cumulative catch-up adjustment for the inception-to-date effect of such changes. Cumulative catch-up adjustments are driven by several factors including production efficiencies, assumed rate of production, the rate of overhead absorption, changes to scope of work, and contract modifications. The full extent to which the effects of the COVID-19 pandemic will impact our business, operations, results of operations and financial condition depends on future developments that are inherently uncertain. We have made reasonable estimates and judgments of the COVID-19 pandemic’s impact within our financial statements and there may be changes to those estimates in future periods related to changes in potential production volumes or timing of those production volumes. During the first quarter ended April 1, 2021, the Company recognized unfavorable changes in estimates of $78.2, which included net forward charges of $72.4, and unfavorable cumulative catch-up adjustments related to periods prior to the first quarter of 2021 of $5.8. The forward losses in the first quarter relate primarily to the B767 program due to cost performance, B787 program primarily driven by engineering analysis and the estimated cost of re-work, and A350 program primarily driven by schedule changes and costs for tooling and build process quality improvements. Changes in estimates are summarized below: For the Three Months Ended Changes in Estimates April 1, 2021 April 2, 2020 (Unfavorable) Favorable Cumulative Catch-up Adjustment by Segment Fuselage $ 1.9 $ (4.0) Propulsion (5.6) (1.5) Wing (2.1) (2.7) Total (Unfavorable) Favorable Cumulative Catch-up Adjustment $ (5.8) $ (8.2) Changes in Estimates on Loss Programs (Forward Loss) by Segment Fuselage $ (55.1) $ (13.2) Propulsion (4.7) (3.1) Wing (12.6) (3.4) Total Changes in Estimates (Forward Loss) on Loss Programs $ (72.4) $ (19.7) Total Change in Estimate $ (78.2) $ (27.9) EPS Impact (diluted per share based upon 2021 forecasted effective tax rate) $ (0.74) $ (0.17)

Accounts Receivable and Allowan

Accounts Receivable and Allowance for Credit Losses Accounts Receivable and Allowance for Credit Loss (Notes)3 Months Ended
Apr. 01, 2021
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]. Accounts Receivable and Allowance for Credit Losses Accounts Receivable, net Accounts receivable represent the Company’s unconditional rights to consideration, subject to the payment terms of the contract, for which only the passage of time is required before payment. Unbilled receivables are reflected under contract assets on the balance sheet. See also Allowance for Credit Losses, below . Accounts receivable, net consists of the following: April 1, December 31, Trade receivables $ 498.8 $ 458.9 Other 33.4 31.1 Less: allowance for credit losses (6.4) (5.6) Accounts receivable, net $ 525.8 $ 484.4 The Company has two agreements (through its subsidiaries) to sell, on a revolving basis, certain trade accounts receivable balances with Boeing and Airbus to third party financial institutions. These programs were primarily entered into as a result of Boeing and Airbus seeking payment term extensions with the Company and they continue to allow the Company to monetize the receivables prior to their payment date, subject to payment of a discount. No guarantees are delivered under the agreements. The Company's ability to continue using such agreements is primarily dependent upon the strength of Boeing’s and Airbus’s financial condition. Transfers under this agreement are accounted for as sales of receivables resulting in the receivables being derecognized from the Company's balance sheet. For the three months ended April 1, 2021, $455.1 of accounts receivable were sold via these arrangements. The proceeds from these sales of receivables are included in cash from operating activities in the Condensed Consolidated Statement of Cash Flows. The recorded net loss on sale of receivables is $1.6 for the three months ended April 1, 2021 and is included in Other income and expense. See Note 21, Other (Expense) Income, Net . Allowance for Credit Losses Management assesses and records an allowance for credit losses on financial assets within the scope of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), using the Current Expected Credit Losses (“CECL”) model. The amount necessary to adjust the allowance for credit losses to management’s current estimate, as of the reporting date, on these as sets is recorded in net income as credit loss expense. All credit losses reported in accordance with ASU 2016-13 were on trade receivables and/or contract assets arising from the Company’s contracts with customers. In determining the appropriate methodology to use within the CECL model for receivables and contract assets arising from the Company’s contracts with customers, the Company considered the risk characteristics of the applicable assets. Spirit segregated the trade receivables and contract assets into “pools” of assets at the major customer level. The Company's assessment was based on similarity of risk characteristics shared by these pool of assets. Management observed that risks for collectability, with regard to the trade receivables and contract assets resulting from contracts with customers include: macro level economic conditions that impact all of Spirit’s customers, macro level market conditions that could impact Spirit’s customers in certain aircraft categories, certain customer specific market conditions, certain customer specific economic conditions, and certain customer specific administrative conditions. The Company selected a loss-rate method for the CECL model, based on the relationship between historical write-offs of receivables and the underlying sales by major customer. Utilizing this model, a historical loss-rate is applied against the amortized cost of applicable assets, at the time the asset is established. The loss rate reflects the Company’s current estimate of the risk of loss (even when that risk is remote) over the expected remaining contractual life of the assets. The Company's policy is to deduct write-offs from the allowance for credit losses account in the period in which the financial assets are deemed uncollectible.

Contract with customer, asset a

Contract with customer, asset and liability (Notes)3 Months Ended
Apr. 01, 2021
Revenue from Contract with Customer [Abstract]
contract with customer, asset and liability [Text Block]Contract Assets and Contract Liabilities Contract assets primarily represent revenues recognized for performance obligations that have been satisfied but for which amounts have not been billed. Contract assets, current are those that are expected to be billed to our customer within 12 months. Contract assets, long-term are those that are expected to be billed to our customer over periods greater than 12 months. No impairments to contract assets were recorded for the period ended April 1, 2021 or the period ended April 2, 2020. See also Note 5, Accounts Receivable and Allowance for Credit Losses . Contract liabilities are established for cash received in excess of revenues recognized and are contingent upon the satisfaction of performance obligations. Contract liabilities primarily consist of cash received on contracts for which revenue has been deferred since the receipts are in excess of transaction price resulting from the allocation of consideration based on relative standalone selling price to future units (including those under option that the Company believes are likely to be exercised) with prices that are lower than standalone selling price. These contract liabilities will be recognized earlier if the options are not fully exercised, or immediately, if the contract is terminated prior to the options being fully exercised. April 1, 2021 December 31, 2020 Change Contract assets $ 367.8 $ 372.8 $ (5.0) Contract liabilities (467.8) (469.6) 1.8 Net contract assets (liabilities) $ (100.0) $ (96.8) $ (3.2) For the period ended April 1, 2021, the decrease in contract assets reflects the net impact of less over time revenue recognition in relation to billed revenues during the period. The decrease in contract liabilities reflects the net impact of less deferred revenues recorded in excess of revenue recognized during the period. The Company recognized $62.0 of revenue that was included in the contract liability balance at the beginning of the period. April 2, 2020 December 31, 2019 Change Contract assets $ 391.3 $ 534.7 $ (143.4) Contract liabilities (555.8) (514.6) (41.2) Net contract assets (liabilities) $ (164.5) $ 20.1 $ (184.6) For the period ended April 2, 2020, the decrease in contract assets reflects the net impact of less over time revenue recognition in relation to billed revenues during the period. The increase in contract liabilities reflects the net impact of additional deferred revenues recorded in excess of revenue recognized during the period. The Company recognized $33.1 of revenue that was included in the contract liability balance at the beginning of the period.
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]April 1, 2021 December 31, 2020 Change Contract assets $ 367.8 $ 372.8 $ (5.0) Contract liabilities (467.8) (469.6) 1.8 Net contract assets (liabilities) $ (100.0) $ (96.8) $ (3.2)

Revenue (Notes)

Revenue (Notes)3 Months Ended
Apr. 01, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Text Block]Disaggregation of Revenue The Company disaggregates revenue based on the method of measuring satisfaction of the performance obligation either over time or at a point in time, based upon the location where products and services are transferred to the customer, and based upon major customer. The Company’s principal operating segments and related revenue are noted in Note 22, Segment Information . The following tables show disaggregated revenues for the periods ended April 1, 2021 and April 2, 2020: For the Three Revenue April 1, April 2, Contracts with performance obligations satisfied over time $ 649.2 $ 605.9 Contracts with performance obligations satisfied at a point in time 251.6 471.4 Total Revenue $ 900.8 $ 1,077.3 The following table disaggregates revenue by major customer: For the Three Customer April 1, April 2, Boeing $ 467.9 $ 676.1 Airbus 231.6 287.2 Other 201.3 114.0 Total Revenue $ 900.8 $ 1,077.3 The following table disaggregates revenue based upon the location where control of products are transferred to the customer: For the Three Location April 1, April 2, United States $ 624.2 $ 782.5 International United Kingdom 136.3 184.1 Other 140.3 110.7 Total International 276.6 294.8 Total Revenue $ 900.8 $ 1,077.3 Remaining Performance Obligations Unsatisfied, or partially unsatisfied, performance obligations that are expected to be recognized in the future are noted in the table below. The Company expects options to be exercised in addition to the amounts presented below: Remaining in 2021 2022 2023 2024 and After Unsatisfied performance obligations $ 2,115.3 $ 3,317.2 $ 4,310.2 $ 3,258.0

Inventory

Inventory3 Months Ended
Apr. 01, 2021
Inventory Disclosure [Abstract]
InventoryInventoryInventory consists of raw materials used in the production process, work-in-process, which is direct material, direct labor, overhead and purchases, and capitalized preproduction costs. Raw materials are stated at lower of cost (principally on an actual or average cost basis) or net realizable value. Capitalized pre-production costs include certain contract costs, including applicable overhead, incurred before a product is manufactured on a recurring basis. These costs are typically amortized over a period that is consistent with the satisfaction of the underlying performance obligations to which these relate. April 1, December 31, Raw materials $ 331.8 $ 337.3 Work-in-process (1) 989.5 1,000.6 Finished goods 48.2 58.1 Product inventory 1,369.5 1,396.0 Capitalized pre-production 26.3 26.3 Total inventory, net $ 1,395.8 $ 1,422.3 (1) Work-in-process inventory includes direct labor, direct material, overhead, and purchases on contracts for which revenue is recognized at a point in time as well as sub-assembly parts that have not been issued to production on contracts for which revenue is recognized using the input method. For the periods ended April 1, 2021 and December 31, 2020, work-in-process inventory includes $365.0 and $351.2, respectively, of costs incurred in anticipation of specific contracts and no impairments were recorded in the period. Product inventory, summarized in the table above, is shown net of valuation reserves of $56.7 and $56.8 as of April 1, 2021 and December 31, 2020, respectively. Excess capacity and abnormal production costs are excluded from inventory and recognized as expense in the period incurred. Cost of sales for three months ended April 1, 2021 includes period expense of $67.6 for excess capacity production costs related to temporary B737 MAX, A220 and A320 production schedule changes. Cost of sales also includes abnormal costs related to temporary workforce adjustments as a result of COVID-19 production pause, net of the U.S. employee retention credit and U.K. government subsidies for the three months ended April 1, 2021 of $2.1.

Property, Plant and Equipment

Property, Plant and Equipment3 Months Ended
Apr. 01, 2021
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, netProperty, Plant and Equipment, net Property, plant and equipment, net consists of the following: April 1, December 31, Land $ 30.9 $ 30.8 Buildings (including improvements) 1,196.5 1,166.7 Machinery and equipment 2,128.0 2,120.5 Tooling 1,042.2 1,036.1 Capitalized software 282.6 282.5 Construction-in-progress 204.9 220.0 Total 4,885.1 4,856.6 Less: accumulated depreciation (2,428.1) (2,352.8) Property, plant and equipment, net $ 2,457.0 $ 2,503.8 Capitalized interest was $1.4 and $1.2 for the three months ended April 1, 2021 and April 2, 2020, respectively. Repair and maintenance costs are expensed as incurred. The Company recognized repair and maintenance costs of $34.4 and $30.5 for the three months ended April 1, 2021 and April 2, 2020, respectively. The Company capitalizes certain costs, such as software coding, installation, and testing, that are incurred to purchase or to create and implement internal-use computer software. Depreciation expense related to capitalized software was $4.1 and $4.3 for the three months ended April 1, 2021 and April 2, 2020, respectively. The Company reviews capital and amortizing intangible assets (long-lived assets) for impairment on an annual basis or whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. F or the period ended April 1, 2021, there were no events which would require the Company to update its impairment analysis.

Leases (Notes)

Leases (Notes)3 Months Ended
Apr. 01, 2021
Leases [Abstract]
Leases of Lessee Disclosure [Text Block]The Company determines if an arrangement is a lease at the inception of a signed agreement. Operating leases are included in right-of-use (“ROU”) assets (long-term), short-term operating lease liabilities, and long-term operating lease liabilities on the Company’s consolidated balance sheet. Finance leases are included in Property, Plant and Equipment, current maturities of long-term debt, and long-term debt. ROU assets represent the right of the Company to use an underlying asset for the length of the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. To determine the present value of lease payments, the Company uses its estimated incremental borrowing rate or the implicit rate, if readily determinable. The estimated incremental borrowing rate is based on information available at the lease commencement date, including any recent debt issuances and publicly available data for instruments with similar characteristics. The ROU asset also includes any lease payments made and excludes lease incentives. The Company's lease terms may include options to extend or terminate the lease and, when it is reasonably certain that an option will be exercised, those options are included in the net present value calculation. Leases with a term of 12 months or less, which are primarily related to automobiles and manufacturing equipment, are not recorded on the balance sheet. The aggregate amount of lease cost for leases with a term of 12 months or less is not material. The Company has lease agreements that include lease and non-lease components, which are generally accounted for separately. For certain leases (primarily related to IT equipment), the Company does account for the lease and non-lease components as a single lease component. A portfolio approach is applied to effectively account for the ROU assets and liabilities for those specific leases referenced above. The Company does not have any material leases containing variable lease payments or residual value guarantees. The Company also does not have any material subleases. The Company currently has operating and finance leases for items such as manufacturing facilities, corporate offices, manufacturing equipment, transportation equipment, and vehicles. The majority of the Company's active leases have remaining lease terms that range between less than one year to 18 years, some of which include options to extend the leases for up to 30 years, and some of which include options to terminate the leases within one year. Components of lease expense: For the Three April 1, April 2, Operating lease cost $ 2.5 $ 2.2 Finance lease cost: Amortization of assets 6.0 5.8 Interest on lease liabilities 1.6 1.6 Total net lease cost $ 10.1 $ 9.6 Supplemental cash flow information related to leases was as follows: For the Three April 1, April 2, Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 2.4 $ 2.2 Operating cash flows from finance leases $ 1.6 $ 1.6 Financing cash flows from finance leases $ 8.9 $ 6.7 ROU assets obtained in exchange for lease obligations: Operating leases $ 1.0 $ 0.2 Supplemental balance sheet information related to leases: April 1, 2021 December 31, 2020 Finance leases: Property and equipment, gross $ 214.2 $ 214.2 Accumulated amortization (51.1) (45.1) Property and equipment, net $ 163.1 $ 169.1 The weighted average remaining lease term as of April 1, 2021 for operating and finance leases was 42.8 years and 5.2 years, respectively. The weighted average discount rate as of April 1, 2021 for operating and finance leases was 5.5% and 4.3%, respectively. The weighted average remaining lease term as of December 31, 2020 for operating and finance leases was 42.3 years and 5.5 years, respectively. The weighted average discount rate as of December 31, 2020 for operating and finance leases was 5.5% and 4.3%, respectively. See Note 15, Debt , for current and non-current finance lease obligations. There has not been a significant impact on lease terms, costs, cash flows, or balance sheet values, including any impairment of lease assets, as a result of the COVID-19 pandemic. As of April 1, 2021, remaining maturities of lease liabilities were as follows: 2021 2022 2023 2024 2025 2026 and thereafter Total Lease Payments Less: Imputed Interest Total Lease Obligations Operating Leases $ 6.6 $ 8.8 $ 7.9 $ 7.4 $ 6.8 $ 170.0 $ 207.5 $ (135.4) $ 72.1 Financing Leases $ 30.8 $ 37.2 $ 32.2 $ 25.4 $ 15.6 $ 24.7 $ 165.9 $ (17.9) $ 148.0 As of April 1, 2021, the Company had additional operating and financing lease commitments that have not yet commenced of approximately $106.9 f or manufacturing equipment, software, and facilities that are in various phases of construction or customization for the Company's

Advance Payments and Deferred R

Advance Payments and Deferred Revenue/Credits3 Months Ended
Apr. 01, 2021
Advance Payments And Deferred Revenue Credits [Abstract]
Advance PaymentsAdvance Payments Advances on the B787 Program. Boeing has made advance payments to Spirit under the B787 Special Business Provisions and General Terms Agreement (collectively, the “B787 Supply Agreement”) that are required to be repaid to Boeing by way of offset against the purchase price for future shipset deliveries. Advance repayments were initially scheduled to be spread evenly over the remainder of the first 1,000 B787 shipsets delivered to Boeing. On April 8, 2014, Spirit signed a memorandum of agreement with Boeing that suspended advance repayments related to the B787 program for a period of twelve months beginning April 1, 2014. Repayment recommenced on April 1, 2015, and any repayments that otherwise would have become due during such twelve-month period will offset the purchase price for shipsets 1,001 through 1,120. On December 21, 2018, Spirit signed a memorandum of agreement with Boeing that again suspended the advance repayments beginning with line unit 818. The advance repayments will resume at a lower rate of $0.45 per shipset at line number 1135 and continue through line number 1605. In the event Boeing does not take delivery of a sufficient number of shipsets to repay the full amount of advances prior to the termination of the B787 program or the B787 Supply Agreement, any advances not then repaid will be applied against any outstanding payments then due by Boeing to us, and any remaining balance will be repaid in annual installments of $27 due on December 15th of each year until the advance payments have been fully recovered by Boeing. As of April 1, 2021, the amount of advance payments received from Boeing under the B787 Supply Agreement and not yet repaid was approximately $212. Advances on the B737 Program. In an effort to minimize the disruption to Spirit's operations and its supply chain, Spirit and Boeing entered into a Memorandum of Agreement on April 12, 2019 (the "2019 MOA"), which included the terms and conditions for an advance payment to be made from Boeing to Spirit in the amount of $123, which was received during the third quarter of 2019. The parties entered into another memorandum of agreement on February 6, 2020 (the "2020 MOA"), which extended the repayment date of the $123 advance received by Spirit under the 2019 MOA to 2022. The 2020 MOA also required Boeing to pay $225 to Spirit in the first quarter of 2020, consisting of (i) $70 in support of Spirit’s inventory and production stabilization, of which $10 will be repaid by Spirit in 2021, and (ii) $155 as an incremental pre-payment for costs and shipset deliverie s over the next two years. On February 9, 2021, Spirit signed a letter of agreement for Boeing to pay $38.5 to Spirit in the first quarter of 2021, which consisted of (i) $68.5 as additional pre-payment for the costs and shipset deliveries less the (ii) ($30) credit owed to Boeing for rate-based pricing premium. As of April 1, 2021, the amount of advance payments received from Boeing and not yet repaid was $130.5. Advances on the Irkut Program . Irkut made an advance payment of $150 to Short Brothers plc, an indirect subsidiary of Holdings ("Shorts"), at the inception of the program in 2012 for the design and development of the Nacelle for the MC-21 aircraft. The remainder of $0.5 will be released in 2021.

Fair Value Measurements

Fair Value Measurements3 Months Ended
Apr. 01, 2021
Fair Value Disclosures [Abstract]
Fair Value MeasurementsFair Value Measurements The FASB’s authoritative guidance on fair value measurements defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. It also establishes a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The guidance discloses three levels of inputs that may be used to measure fair value: Level 1 Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. Observable inputs, such as current and forward interest rates and foreign exchange rates, are used in determining the fair value of the interest rate swaps and foreign currency hedge contracts. Level 3 Unobservable inputs that are supported by little or no market activity and are significant to the fair value of assets and liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. At April 1, 2021, the Company’s long-term debt includes a senior secured term loan and senior notes described further under Note 15, Debt . The estimated fair value of the Company’s debt obligations is based on the quoted market prices for such obligations or the historical default rate for debt with similar credit ratings. The following table presents the carrying amount and estimated fair value of long-term debt: April 1, 2021 December 31, 2020 Carrying Fair Carrying Fair Senior secured term loan B (including current portion) $ 389.2 $ 393.6 (2) $ 389.6 $ 395.0 (2) Floating rate notes — — 299.7 297.5 (1) Senior notes due 2023 298.9 296.4 (1) 298.8 293.8 (1) Senior secured first lien notes due 2025 494.2 522.9 (1) 493.9 521.2 (1) Senior secured second lien notes due 2025 1,185.1 1,280.4 (1) 1,184.2 1,279.1 (1) Senior notes due 2026 298.2 310.0 (1) 298.1 313.9 (1) Senior notes due 2028 694.8 683.5 (1) 694.6 689.2 (1) Total $ 3,360.4 $ 3,486.8 $ 3,658.9 $ 3,789.7 (1) Level 1 Fair Value hierarchy

Derivative and Hedging Activiti

Derivative and Hedging Activities3 Months Ended
Apr. 01, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative and Hedging ActivitiesDerivative and Hedging Activities The Company has traditionally entered into interest rate swap agreements to reduce its exposure to the variable rate portion of its long-term debt. The Company also considers counterparty credit risk and its own credit risk in its determination of all estimated fair values. The Company has historically entered into derivative instruments governed by master netting arrangements that contain various netting and setoff provisions. Derivatives Accounted for as Hedges Cash Flow Hedges - Interest Rate Swaps During the third quarter of 2019, Spirit entered into two interest rate swap agreements, designated as cash flow hedges by the Company, with a combined notional value of $450.0. On February 24, 2021, Spirit terminated its remaining swap agreement with a notional value of $150.0. As of April 1, 2021, the Company had no swaps outstanding. Changes in the fair value of cash flow hedges are recorded in Accumulated Other Comprehensive Income ("AOCI") and recorded in earnings in the period in which the hedged transaction occurs. No gain or loss was recognized in AOCI for the three months ended April 1, 2021. For the three months ended April 1, 2021 a loss of $0.4 was reclassified from AOCI to earnings, and included in the interest expense line item on the Condensed Consolidated Statements of Operations, and in operating activities on the Condensed Consolidated Statements of Cash Fl ows. For the three months ended April 1, 2021 a loss of $0.7 was reclassified from AOCI to earnings resulting from the termination of a swap agreement, and included in the other income line item on the Condensed Consolidated Statements of Operations, and in operating activities on the Condensed Consolidated Statement of Cash Flows. Cash Flow Hedges – Foreign Currency Forward Contract On February 3, 2021, Shorts entered into a foreign currency forward contract, designated as a cash flow hedge, to purchase £100.0 for $137.1 on October 28, 2021, for purposes of hedging exposure to foreign currency risk on a contribution of £100.0 to be made to the Shorts' Pension on the first anniversary of the Bombardier Acquisition closing. Changes in the fair value of cash flow hedges are recorded in AOCI and recorded in earnings in the period in which the hedged transaction occurs. The gain recognized in AOCI was $1.2 for the three months ended April 1, 2021. Within the next 12 months, Shorts expects to recognize a gain of $1.2 in earnings related to the foreign currency forward contracts. As of April 1, 2021

Debt

Debt3 Months Ended
Apr. 01, 2021
Debt Disclosure [Abstract]
DebtDebt Total debt shown on the balance sheet is comprised of the following: April 1, 2021 December 31, 2020 Current Noncurrent Current Noncurrent Senior secured term loan B $ 3.9 $ 385.3 $ 3.9 $ 385.7 Floating Rate Notes — — 299.7 — Senior notes due 2023 — 298.9 — 298.8 Senior secured first lien notes due 2025 — 494.2 — 493.9 Senior secured second lien notes due 2025 — 1,185.1 — 1,184.2 Senior notes due 2026 — 298.2 — 298.1 Senior notes due 2028 — 694.8 — 694.6 Present value of finance lease obligations 35.0 113.0 35.3 121.5 Other 1.3 55.7 1.8 56.1 Total $ 40.2 $ 3,525.2 $ 340.7 $ 3,532.9 Credit Agreement On October 5, 2020, Spirit entered into a term loan credit agreement (the “Credit Agreement”) providing for a $400.0 senior secured term loan B credit facility with the lenders party thereto and Bank of America, N.A., as administrative agent and collateral agent. On October 5, 2020, Spirit borrowed the full $400.0 of initial term loans available under the Credit Agreement. The obligations under the Credit Agreement are guaranteed by Holdings and Spirit AeroSystems North Carolina, Inc., a wholly-owned subsidiary of the Company (“Spirit NC”), (collectively, the “Guarantors”) and each existing and future, direct and indirect, wholly-owned material domestic subsidiary of Spirit, subject to certain customary exceptions. The obligations are secured by a first-priority lien with respect to substantially all assets of Spirit and the Guarantors, subject to certain exceptions. As of April 1, 2021 , the outstanding balance of the Credit Agreement was $399.0 and the carrying value was $389.2. As of April 1, 2021, the Company was in compliance with all covenants in the Credit Agreement. First Lien 2025 Notes On October 5, 2020, Spirit entered into an Indenture (the “First Lien 2025 Notes Indenture”), by and among Spirit, the Guarantors, and The Bank of New York Mellon Trust Company, N.A., as trustee and collateral agent, in connection with Spirit’s offering of $500.0 aggregate principal amount of its 5.500% Senior Secured First Lien Notes due 2025 (the “First Lien 2025 Notes"). The First Lien 2025 Notes are guaranteed by the Guarantors and secured by certain real property and personal property, including certain equity interests, owned by Spirit and the Guarantors. As of April 1, 2021 , the outstanding balance of the First Lien 2025 Notes was $500.0 and the carrying value was $494.2. 2026 Notes In June 2016, the Company issued $300.0 in aggregate principal amount of 3.850% Senior Notes due June 15, 2026 (the “2026 Notes”) with interest payable, in cash in arrears, on June 15 and December 15 of each year, beginning December 15, 2016. On October 5, 2020, Spirit entered into a Fourth Supplemental Indenture (the “Fourth Supplemental Indenture”), by and among Spirit, the Company, Spirit NC and The Bank of New York Mellon Trust Company, N.A., as trustee in connection with 2026 Notes. Under the Fourth Supplemental Indenture, the holders of the 2026 Notes were granted security on an equal and ratable basis with the holders of the First Lien 2025 Notes and the secured parties under the Credit Agreement. As of April 1, 2021, the outstanding balance of the 2026 Notes was $300.0 and the carrying value was $298.2. Second Lien 2025 Notes On April 17, 2020, Spirit entered into an Indenture (the “Second Lien 2025 Notes Indenture”), by and among Spirit, the Guarantors, and The Bank of New York Mellon Trust Company, N.A., as trustee and collateral agent, in connection with Spirit’s offering of $1,200.0 aggregate principal amount of its 7.500% Senior Secured Second Lien Notes due 2025 (the “Second Lien 2025 Notes”). The Second Lien 2025 Notes mature on April 15, 2025 and bear interest at a rate of 7.500% per year payable semiannually in cash in arrears on April 15 and October 15 of each year. The first interest payment date was October 15, 2020. The Second Lien 2025 Notes are guaranteed by the Guarantors and secured by certain real property and personal property, including certain equity interests, owned by Spirit and the Guarantors. As of April 1, 2021 , the outstanding balance of the Second Lien 2025 Notes was $1,200.0 and the carrying value was $1,185.1. Floating Rate, 2023, and 2028 Notes On May 30, 2018, Spirit entered into an Indenture (the “2018 Indenture”) by and among Spirit, the Company and The Bank of New York Mellon Trust Company, N.A., as trustee in connection with Spirit’s offering of $300.0 aggregate principal amount of its Senior Floating Rate Notes due 2021 (the “Floating Rate Notes”), $300.0 aggregate principal amount of its 3.950% Senior Notes due 2023 (the “2023 Notes”) and $700.0 aggregate principal amount of its 4.600% Senior Notes due 2028 (the “2028 Notes” and, together with the Floating Rate Notes and the 2023 Notes, the “2018 Notes”). Holdings guaranteed Spirit’s obligations under the 2018 Notes on a senior unsecured basis. On February 24, 2021, Spirit redeemed the outstanding $300 million principal amount of the Floating Rate Notes. As of April 1, 2021 , the outstanding balance of the Floating Rate Notes was $0. As of April 1, 2021 , the outstanding balance of the 2023 Notes and the 2028 Notes was $300.0 and $700.0, respectively, and the carrying value was $298.9 and $694.8, respectively. As of April 1, 2021, the Company was in compliance with all covenants contained in the indentures governing the First Lien 2025 Notes, 2026 Notes, Second Lien 2025 Notes, 2023 Notes and 2028 Notes.

Pension and Other Post-Retireme

Pension and Other Post-Retirement Benefits Defined Benefit Plan (Notes)3 Months Ended
Apr. 01, 2021
Retirement Benefits [Abstract]
Retirement Benefits [Text Block]Pension and Other Post-Retirement Benefits Defined Benefit Plans For the Three Components of Net Periodic Pension Expense/(Income) April 1, April 2, Service cost $ 10.8 $ 0.2 Interest cost 13.7 8.0 Expected return on plan assets (39.4) (17.3) Curtailment loss (gain) (2) — 33.0 Special termination benefits (1) — 24.7 Net periodic pension expense (income) $ (14.9) $ 48.6 Other Benefits For the Three Components of Other Benefit Expense April 1, April 2, Service cost $ 0.2 $ 0.3 Interest cost 0.1 0.2 Amortization of prior service cost (0.2) (0.2) Amortization of net gain (0.4) (0.5) Curtailment (gain) loss (2) — (0.3) Special termination benefits (1) — 11.8 Net periodic other benefit expense (income) $ (0.3) $ 11.3 (1) Special termination benefits for the three months ended April 2, 2020 is a combination of pension value plan, postretirement medical plan, and settlement accounting changes offset by a reduction in the Company's net benefit obligation. Due to settlement accounting, the Company remeasured the pension assets and obligations and retiree medical which resulted in a $116.8 and $4.3 impact to Other Comprehensive Income ("OCI"), respectively. This impact is included in the Company’s Condensed Consolidated Statements of Comprehensive Income (Loss). (2) Curtailment loss in the three months ended April 2, 2020 occurred as result of the Company’s Voluntary Retirement Program ("VRP") offered to eligible employees during the first quarter of 2020 and is included in other (expense) income in the Company's Condensed Consolidated Statements of Operations. The components of net periodic pension expense (income) and other benefit expense, other than the service cost component, are included in other (expense) income in the Company's Condensed Consolidated Statements of Operations. Employer Contributions The Company expects to contribute zero dollars to the U.S. qualified pension plan and a combined total of approximately $10.4 for the U.S. Supplemental Executive Retirement Plan (“SERP”) and U.S. post-retirement medical plans in 2021. The Company’s projected contributions to the U.K. pension plan for 2021 are $1.9. Additionally, the Company expects to contribute $181.8 for the Shorts' Pension, the Shorts' Executive Benefits Scheme, and the Shorts' Postretirement Medical Plan. The entire amount contributed can vary based on exchange rate fluctuations.

Stock Compensation

Stock Compensation3 Months Ended
Apr. 01, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock CompensationStock Compensation Holdings has established the stockholder-approved 2014 Omnibus Incentive Plan, as amended (the “Omnibus Plan”), to grant cash and equity awards of Class A Common Stock, par value $0.01 per share (the “Common Stock”), to certain individuals. Holdings has established the Long-Term Incentive Plan (the “LTIP”) under the Omnibus Plan to grant equity awards to certain employees of the Company. The Company recognized a net total of $6.6 and $9.8 of stock compensation expense for the three months ended April 1, 2021 and April 2, 2020, respectively. During the three months ended April 1, 2021, 346,896 time or service-based restricted stock units ("RSUs") and 30,024 time or service-based restricted stock awards ("RSAs") were granted with aggregate date fair values of $16.1 under the Company's LTIP. Awards generally vest over a two or three-year period, beginning on the date of grant. Values for these awards are based on the value of Common Stock on the grant date. During the three months ended April 1, 2021, 161,954 performance-based restricted stock units ("PBRSUs") were granted with aggregate grant date fair value of $9.8 under the Company’s LTIP. These awards are earned based on Holdings’ total shareholder return relative to its peer group over a three year performance period. Values for these awards are initially measured on the grant date using the estimated payout levels derived from a Monte Carlo valuation model. During the three months ended April 1, 2021, 202,153 shares of Common Stock with an aggregate grant date value of $14.2 vested under the Company's LTIP.

Income Taxes (Notes)

Income Taxes (Notes)3 Months Ended
Apr. 01, 2021
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]Income Taxes The process for calculating the Company’s income tax expense involves estimating actual current taxes due plus assessing temporary differences arising from differing treatment for tax and accounting purposes that are recorded as deferred tax assets and liabilities. Deferred tax assets are periodically evaluated to determine their recoverability and whether a valuation allowance is necessary. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. When determining the amount of net deferred tax assets that are more likely than not to be realized, the Company assesses all available positive and negative evidence. The weight given to the positive and negative evidence is commensurate with the extent the evidence may be objectively verified. As such, it is generally difficult for positive evidence regarding projected future taxable income exclusive of reversing taxable temporary differences to outweigh objective negative evidence of recent financial reporting losses. Based on these criteria and the relative weighting of both the positive and negative evidence available, and in particular the activity surrounding our prior earnings history including the forward losses previously recognized in the U.S., the Company recorded an incremental valuation allowance of $40.2 for the period ended April 1, 2021. As of April 1, 2021, the total net U.S. deferred tax asset was $190.5. The net U.S. deferred tax liability after the recording valuation allowances was $0.2. The change from December 31, 2020 is additional valuation allowance recognized on the deferred tax assets generated from the 2021 activity. The Company has determined a valuation allowance on certain U.K. deferred tax assets is needed based upon cumulative losses generated in the U.K. Valuation allowances recorded against U.K. deferred tax assets in the period ended April 1, 2021 were $6.2. T his is comprised of $3.5 for opening balance sheet adjustments related to Bombardier Acquisition, $0.6 related to OCI and $2.1 from continuing operations. As of April 1, 2021, the total net U.K. deferred tax asset before the valuation allowance was $187.2. The net U.K. deferred tax liability after valuation allowance was $9.8. The Company will continue to regularly assess the potential for realization of its net deferred tax assets in future periods. Changes in future earnings projections, among other factors, may cause the Company to record a valuation allowance against some or all of its net deferred tax assets, which may materially impact its income tax expense in the period the Company determines that these factors have changed. The Company files income tax returns in all jurisdictions in which it operates. The Company establishes reserves to provide for additional income taxes that may be due upon audit. These reserves are established based on management’s assessment as to the potential exposure attributable to permanent tax adjustments and associated interest. All tax reserves are analyzed quarterly and adjustments made as events occur that warrant modification. In general, the Company records income tax expense each quarter based on its estimate as to the full year’s effective tax rate. Certain items, however, are given discrete period treatment and the tax effects for such items are therefore reported in the quarter that an event arises. Events or items that may give rise to discrete recognition include excess tax benefits with respect to share-based compensation, finalizing amounts in income tax returns filed, finalizing audit examinations for open tax years and expiration of statutes of limitations, and changes in tax law. T he 1.0% effectiv e tax rate for the three months ended April 1, 2021 differs from the 35.1% effective tax rate for the same period of 2020 primarily due to the valuation allowance recorded in 2021. As the Company is currently reporting a pre-tax loss for the three months ended April 1, 2021, increases to tax expense result in a decrease to the effective tax rate and decreases to tax expense result in an increase to the effective tax rate. As of April 1, 2021 , the Company had deferred $33.0 of employer payroll taxes, as allowed by the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”), of which 50% are required to be deposited by December 2021 and the remaining 50% by December 2022. As of April 1, 2021 , the Company has recorded an estimated pre-tax employee retention credit of approximately $18.6 related to calendar year 2020. The Company is evaluating its eligibility to continue with the pre-tax employee retention credit or to avail itself of the Aviation Manufacturing Jobs Protection Program. In addition, as of April 1, 2021 , the Company had recorded a deferral of $31.8 of VAT payments with the option to pay in smaller payments through the end of March 31, 2022 interest free under the United Kingdom deferral scheme. The Company's federal audit for the 2020 tax year is in process under the Internal Revenue Service Compliance Assurance Program ("CAP"). The Company will continue to participate in the CAP program for the 2021 tax year. The CAP program’s objective is to resolve issues in a timely, contemporaneous manner and eliminate the need for a lengthy post-filing examination. The Company has an open tax audit in the Kingdom of Morocco for the tax years ended prior to the Company's ownership of the Moroccan legal entity. The company has been notified of the opening of a French Tax Audit Control for the tax years 2018 and 2019.

Equity

Equity3 Months Ended
Apr. 01, 2021
Stockholders' Equity Note [Abstract]
EquityEquity Earnings per Share Calculation Basic net income per share is computed using the weighted-average number of outstanding shares of Common Stock during the measurement period. Diluted net income per share is computed using the weighted-average number of outstanding shares of Common Stock and, when dilutive, potential outstanding shares of Common Stock during the measurement period. The Company accounts for treasury stock under the cost method and includes treasury stock as a component of stockholders’ equity. As of April 1, 2021, no treasury shares have been reissued or retired. The total authorization amount remaining under the current share repurchase program is approximately $925.0. During the three month period ended April 1, 2021, the Company did not repurchase any shares of its Common Stock under this share repurchase program. Share repurchases are currently on hold pending the outcome of the COVID-19 pandemic. The Credit Agreement imposes restrictions on the Company’s ability to repurchase shares. The following table sets forth the computation of basic and diluted earnings per share: For the Three Months Ended April 1, 2021 April 2, 2020 Income Shares Per Share Income Shares Per Share Basic EPS Loss available to common stockholders $ (171.6) 104.1 $ (1.65) $ (162.9) 103.7 $ (1.57) Income allocated to participating securities — — (0.1) — Net loss $ (171.6) $ (163.0) Diluted potential common shares — Diluted EPS Net loss $ (171.6) 104.1 $ (1.65) $ (163.0) 103.7 $ (1.57) Included in the outstanding Common Stock were 1.3 million and 1.5 million of issued but unvested shares at April 1, 2021 and April 2, 2020, respectively, which are excluded from the basic Earnings Per Share ("EPS") calculation. Common shares of 1.3 million and 0.7 million, respectively, were excluded from diluted EPS as a result of incurring a net loss for the three months ended April 1, 2021 and April 2, 2020, as the effect would have been antidilutive. Additionally, diluted EPS for the three months ended April 1, 2021 and April 2, 2020 excludes 0.2 million and 0.3 million shares, respectively, that may be dilutive common shares in the future, but were not included in the computation of diluted EPS because the effect was either antidilutive or the performance condition was not met. Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss is summarized by component as follows: As of As of April 1, 2021 December 31, 2020 Pension $ (116.5) $ (112.0) Interest swaps — (0.9) SERP/Retiree medical 14.0 14.5 Derivatives - foreign currency hedge 1.2 — Foreign currency impact on long term intercompany loan (11.2) (11.8) Currency translation adjustment (37.5) (43.9) Total accumulated other comprehensive loss $ (150.0) $ (154.1) Amortization or curtailment cost recognition of the pension plans’ net gain/(loss) reclassified from accumulated other comprehensive loss and realized into costs of sales and selling, general and administrative on the Condensed Consolidated Statements of Operations was $0.6 and $1.0 for the three months ended April 1, 2021 and April 2, 2020, respectively. Rights Plan On April 22, 2020, the Company’s Board of Directors declared a dividend of one right (a “Right”) for each outstanding share of Common Stock held of record at the close of business on May 1, 2020 (the “Record Time”), and adopted a stockholder rights plan, as set forth in the Stockholder Protection Rights Agreement, dated as of April 22, 2020 (the “Rights Agreement”), between the Company and Computershare Inc., as Rights Agent. Generally, the Rights may cause substantial dilution to a person or group that acquires 10% (or 20% in the case of a passive institutional investor) or more of the Common Stock unless the Rights are first redeemed or the Rights Agreement is terminated by the Board. While the Rights will not prevent a takeover of the Company, they may discourage a merger, tender or exchange offer or other business combination involving the Company that is not approved by the Board. Nevertheless, the Rights will not interfere with a Board-approved transaction that is in the best interests of the Company and its stockholders because the Rights can be redeemed, or the Rights Agreement terminated, on or prior to the consummation of such a transaction. Prior to exercise, the Rights do not confer voting or dividend rights. The Rights Agreement expired on April 22, 2021 per its terms.

Commitments, Contingencies and

Commitments, Contingencies and Guarantees3 Months Ended
Apr. 01, 2021
Commitments Contingencies And Guarantees [Abstract]
Commitments, Contingencies and GuaranteesCommitments, Contingencies and Guarantees Litigation On February 10, 2020, February 24, 2020, and March 24, 2020, three separate private securities class action lawsuits were filed against the Company in the U.S. District Court for the Northern District of Oklahoma, its Chief Executive Officer, Tom Gentile III, former chief financial officer, Jose Garcia, and former controller (principal accounting officer), John Gilson. On April 20, 2020, the Class Actions were consolidated by the court (the “Consolidated Class Action”), and on July 20, 2020, the plaintiffs filed a Consolidated Class Action Complaint which added Shawn Campbell, the Company’s former Vice President for the 737NG and 737 Max program, as a defendant. Allegations in the Consolidated Class Action include (i) violations of Section 10(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Rule 10b-5 promulgated thereunder against the Company and Messrs. Gentile, Garcia and Gilson, (ii) violations of Section 20(a) of the Exchange Act against the individual defendants, and (iii) violations of Section 10(b) of the Exchange Act and Rule 10b-5(a) and (c) promulgated thereunder against all defendants. On June 11, 2020, a shareholder derivative lawsuit (the “Derivative Action 1”) was filed against the Company (as nominal defendant), all members of the Company’s Board of Directors, and Messrs. Garcia and Gilson in the U.S. District Court for the Northern District of Oklahoma. Allegations in the Derivative Action 1 include (i) breach of fiduciary duty, (ii) abuse of control, and (iii) gross mismanagement. On October 5, 2020, a shareholder derivative lawsuit (the “Derivative Action 2” and, together with Derivative Action 1, the “Derivative Actions”) was filed against the Company (as nominal defendant), all members of the Company’s Board of Directors, and Messrs. Garcia and Gilson in the Eighteenth Judicial District, District Court of Sedgwick County, Kansas. Allegations in the Derivative Action 2 include (i) breach of fiduciary duty, (ii) waste of corporate assets, and (iii) unjust enrichment. The facts underlying the Consolidated Class Action and Derivative Actions relate to the accounting process compliance independent review (the “Accounting Review”) discussed in the Company’s January 30, 2020 press release and described under Management's Discussion and Analysis of Financial Condition and Results of Operations - Accounting Review of the Annual Report on Form 10-K for the year ended December 31, 2019, and its resulting conclusions. The Company voluntarily reported to the SEC the determination that, with respect to the third quarter of 2019, the Company did not comply with its established accounting processes related to potential third quarter contingent liabilities received after the quarter-end. On March 24, 2020, the Staff of the SEC Enforcement Division informed the Company that it had determined to close its inquiry without recommending any enforcement action against the Company. In addition, the facts underlying the Consolidated Class Action and Derivative Actions relate to the Company’s disclosures regarding the B737 MAX grounding and Spirit’s production rate (and related matters) after the grounding. On September 18, 2020, the Company and individual defendants filed a motion to dismiss the Consolidated Class Action. That motion is pending. The Derivative Actions have been stayed pending a decision on the Consolidated Class Action. The Company and the individual defendants deny the allegations in the Consolidated Class Action and the Derivative Action. The Company is involved in a lawsuit filed by a former executive officer for benefits withheld in connection with a disputed violation of restrictive covenants within his retirement agreement. While the Company believes it is not probable that the former executive will succeed in the lawsuit, based upon the executive’s selection of cash as the sole remedy in the third quarter of 2020, the lawsuit could result in a loss up to $40 including pre-trial interest and any other relief, including an estimated offset by retaining previously vested shares. Factors underlying this estimated range of loss may change from time to time, and actual results may vary significantly from this estimate. From time to time, in the ordinary course of business and similar to others in the industry, the Company receives requests for information from government agencies in connection with their regulatory or investigational authority. Such requests can include subpoenas or demand letters for documents to assist the government in audits or investigations. The Company reviews such requests and notices and takes appropriate action. Additionally, the Company is subject to federal and state requirements for protection of the environment, including those for disposal of hazardous waste and remediation of contaminated sites. As a result, the Company is required to participate in certain government investigations regarding environmental remediation actions. In addition to the items addressed above, from time to time, the Company is subject to, and is presently involved in, litigation, legal proceedings, or other claims arising in the ordinary course of business. While the final outcome of these matters cannot be predicted with certainty, considering, among other things, the meritorious legal defenses available, the Company believes that, on a basis of information presently available, none of these items, when finally resolved, will have a material adverse effect on the Company’s long-term financial position or liquidity. Customer and Vendor Claims From time to time the Company receives, or is subject to, customer and vendor claims arising in the ordinary course of business, including, but not limited to, those related to product quality and late delivery. The Company accrues for matters when losses are deemed probable and reasonably estimable. In evaluating matters for accrual and disclosure purposes, we take into consideration multiple factors including without limitation our historical experience with matters of a similar nature, the specific facts and circumstances asserted, the likelihood of an unfavorable outcome, and the severity of any potential loss. Any accruals deemed necessary are reevaluated at least quarterly and updated as matters progress over time. While the final outcome of these types of matters cannot be predicted with certainty, considering, among other things, the factual and legal defenses available, it is the opinion of the Company that, when finally resolved, no current claims will have a material adverse effect on the Company’s long-term financial position or liquidity. However, it is possible that the Company’s results of operations in a period could be materially affected by one or more of these other matters. Guarantees Outstanding guarantees were $19.6 and $19.6 at April 1, 2021 and December 31, 2020, respectively. Restricted Cash - Collateral Requirements The Company was required to maintain $19.5 and $19.5 of restricted cash as of April 1, 2021 and December 31, 2020, respectively, related to certain collateral requirements for obligations under its workers’ compensation programs. The restricted cash is included in “Other assets” in the Company’s Condensed Consolidated Balance Sheets. Indemnification The Company has entered into customary indemnification agreements with its non-employee directors, and its bylaws and certain executive employment agreements include indemnification and advancement provisions. Pursuant to the terms of the bylaws and, with respect to Jose Garcia, his employment agreement, the Company is providing Messrs. Garcia and Gilson and all other individual defendants with defense costs and provisional indemnity with respect to the Consolidated Class Action and Derivative Actions, as appropriate. Under the bylaws and any applicable agreements, the Company agrees to indemnify each of these individuals against claims arising out of events or occurrences related to that individual’s service as the Company’s agent or the agent of any of its subsidiaries to the fullest extent legally permitted. The Company has agreed to indemnify parties for specified liabilities incurred, or that may be incurred, in connection with transactions they have entered into with the Company. The Company is unable to assess the potential number of future claims that may be asserted under these indemnities, nor the amounts thereof (if any). As a result, the Company cannot estimate the maximum potential amount of future payments under these indemnities and therefore, no liability has been recorded. Service and Product Warranties and Extraordinary Rework Provisions for estimated expenses related to service and product warranties and certain extraordinary rework are evaluated on a quarterly basis. These costs are accrued and are recorded to unallocated cost of goods sold. These estimates are established using historical information on the nature, frequency, and average cost of warranty claims, including the experience of industry peers. In the case of new development products or new customers, Spirit considers other factors including the experience of other entities in the same business and management judgment, among others. Service warranty and extraordinary rework is reported in current liabilities and other liabilities on the balance sheet. The warranty balance presented in the table below includes unresolved warranty claims that are in dispute in regards to their value as well as their contractual liability. The Company estimated the total costs related to some of these claims, however, there is significant uncertainty surrounding the disposition of these disputed claims and as such, the ultimate determination of the provision’s adequacy requires significant management judgment. The amount of the specific provisions recorded against disputed warranty claims was $8.1 as of April 1, 2021 and December 31, 2020. These specific provisions represent the Company’s best estimate of probable warranty claims. Should the Company incur higher than expected warranty costs and/or discover new or additional information related to these warranty provisions, the Company may incur additional charges that exceed these recorded provisions. The Company utilized available information to make appropriate assessments, however, the Company recognizes that data on actual claims experience is of limited duration and therefore, claims projections are subject to significant judgment. The amount of the reasonably possible disputed warranty claims in excess of the specific warranty provision was $12.1 as of April 1, 2021 and December 31, 2020. The following is a roll forward of the service warranty and extraordinary rework balance at April 1, 2021: Balance, December 31, 2020 $ 76.9 Charges (release) to costs and expenses (0.3) Payouts (1.0) Exchange rate — Balance, April 1, 2021 $ 75.6

Other Income (Expense), Net

Other Income (Expense), Net3 Months Ended
Apr. 01, 2021
Other Nonoperating Income (Expense) [Abstract]
Other Income (Expense), NetOther (Expense) Income, Net Other (expense) income, net is summarized as follows: For the Three April 1, April 2, Kansas Development Finance Authority bond $ 0.9 $ 1.1 Interest income 0.6 6.9 Foreign currency (losses) gains (1) (8.9) 5.4 Loss on foreign currency contract and interest rate swaps (0.8) 0.1 Loss on sale of accounts receivable (1.6) (3.1) Pension income (loss) (2) 26.1 (59.6) ASC 326 credit loss reserve (1.0) — Intangible assets amortization (2.3) — Other (0.2) 0.2 Total $ 12.8 $ (49.0) (1) Foreign currency gains and losses are due to the impact of movement in foreign currency exchange rates on long-term contractual rights/obligations, as well as cash and both trade and intercompany receivables/payables that are denominated in a currency other than the entity’s functional currency. (2) Pension income for the three months ended April 1, 2021 includes $15.4 of income re

Segment Information

Segment Information3 Months Ended
Apr. 01, 2021
Segment Reporting [Abstract]
Segment InformationSegment Information The Company operates in three principal segments: Fuselage Systems, Propulsion Systems, and Wing Systems. Revenue from Boeing represents a substantial portion of the Company's revenues in all segments. The Wing Systems Segment also includes significant revenues from Airbus. Approximately 78% of the Company's net revenues for the three months ended April 1, 2021 came from the Company's two largest customers, Boeing and Airbus. All other activities fall within the All Other segment, principally made up of non-recurring contracts, sundry sales of miscellaneous services, tooling contracts and sales of natural gas through a tenancy-in-common with other companies that have operations in Wichita, Kansas. The Company's primary profitability measure to review a segment’s operating performance is segment operating income before corporate selling, general and administrative expenses, research and development, and unallocated cost of sales. Corporate selling, general and administrative expenses include centralized functions such as accounting, treasury, and human resources that are not specifically related to the Company's operating segments and are not allocated in measuring the operating segments’ profitability and performance and net profit margins. Research and development includes research and development efforts that benefit the Company as a whole and are not unique to a specific segment. Restructuring costs represent corporate level charges related to the closure of the San Antonio and McAlester sites. Unallocated cost of sales includes general costs not directly attributable to segment operations, such as warranty, early retirement and other incentives. All of these items are not specifically related to the Company’s operating segments and are not utilized in measuring the operating segments’ profitability and performance. The Company’s Fuselage Systems Segment includes development, production and marketing of forward, mid and rear fuselage sections and systems, primarily to aircraft OEMs (OEM refers to aircraft original equipment manufacturer). The Fuselage Systems Segment manufactures products at the Company's facilities in Wichita, Kansas; Tulsa and McAlester, Oklahoma; San Antonio, Texas; Kinston, North Carolina; Biddeford, Maine; Casablanca, Morocco; Belfast, Northern Ireland; and Subang, Malaysia. The Fuselage Systems Segment also includes an assembly plant for the A350 XWB aircraft in Saint-Nazaire, France. The Company’s Propulsion Systems Segment includes development, production and marketing of struts/pylons, nacelles (including thrust reversers) and related engine structural components primarily to aircraft or engine OEMs, as well as related spares and MRO services. The Propulsion Systems Segment manufactures products at the Company's facility in Wichita, Kansas; Dallas, Texas; Biddeford, Maine; Belfast, Northern Ireland; and San Antonio, Texas. The Company’s Wing Systems Segment includes development, production and marketing of wings and wing components (including flight control surfaces) as well as other miscellaneous structural parts primarily to aircraft OEMs. These activities take place at the Company’s facilities in Tulsa and McAlester, Oklahoma; San Antonio, Texas; Kinston, North Carolina; Prestwick, Scotland; Belfast, Northern Ireland; Casablanca, Morocco; and Subang, Malaysia. The Company’s segments are consistent with the organization and responsibilities of management reporting to the chief operating decision-maker for the purpose of assessing performance. The Company’s definition of segment operating income differs from Operating income as presented in its primary financial statements and a reconciliation of the segment and consolidated results is provided in the table set forth below. While some working capital accounts are maintained on a segment basis, much of the Company’s assets are not managed or maintained on a segment basis. Property, plant and equipment, including tooling, is used in the design and production of products for each of the segments and, therefore, is not allocated to any individual segment. In addition, cash, prepaid expenses, other assets, and deferred taxes are managed and maintained on a consolidated basis and generally do not pertain to any particular segment. Raw materials and certain component parts are used in aerostructure production across all segments. Work-in-process inventory is identifiable by segment, but is managed and evaluated at the program level. As there is no segmentation of the Company’s productive assets, depreciation expense (included in fixed manufacturing costs and selling, general and administrative expenses) and capital expenditures, no allocation of these amounts has been made solely for purposes of segment disclosure requirements. The following table shows segment revenues and operating income for the three months ended April 1, 2021 and April 2, 2020: Three Months Ended April 1, April 2, Segment Revenues Fuselage Systems $ 437.1 $ 551.5 Propulsion Systems 226.5 225.2 Wing Systems 223.6 291.4 All Other 13.6 9.2 $ 900.8 $ 1,077.3 Segment Operating Income (Loss) Fuselage Systems (1) $ (59.8) $ (86.4) Propulsion Systems (2) 16.7 (5.3) Wing Systems (3) (18.9) 13.6 All Other 1.2 1.8 $ (60.8) $ (76.3) SG&A (57.6) (77.4) Research and development (8.2) (12.3) Unallocated cost of sales 0.7 (1.5) Total operating income $ (125.9) $ (167.5) (1) The three months ended April 1, 2021 includes excess capacity production costs of $42.6 related to the temporary B737 MAX and A220 production schedule changes, abnormal costs of $0.7 for temporary workforce adjustments as a result of COVID-19 production pause net of U.S. employee retention credit and U.K. government subsidies, $1.8 of restructuring costs. The three months ended April 2, 2020 includes excess capacity cost of $51.2 related to the B737 MAX production schedule adjustment that began on January 1, 2020, $15.3 of abnormal costs for temporary workforce adjustments resulting from the Boeing production suspension which began on March 25, 2020 related to COVID-19, and $30.1 of restructuring costs. (2) The three months ended April 1, 2021 includes excess capacity production costs of $7.2 related to the temporary B737 MAX and A220 production schedule changes, abnormal costs of $0.1 for temporary workforce adjustments as a result of COVID-19 production paus e net of U.S employee retention credit , and $(0.2) of restructuring costs. The three months ended April 2, 2020 includes excess capacity cost of $15.8 related to the B737 MAX production schedule adjustment that began on January 1, 2020, $6.2 of abnormal costs for temporary workforce adjustments resulting from the Boeing production suspension which began on March 25, 2020 related to COVID-19, and $8.8 of restructuring costs. (3) The three months ended April 1, 2021 includes excess capacity production costs of $17.8 related to the temporary B737 and A220 MAX and A320 production schedule changes, abnormal costs of $1.3 for temporary workforce adjustments as a result of COVID-19, net of U.S employee retention credit

Restructuring Charges (Notes)

Restructuring Charges (Notes)3 Months Ended
Apr. 01, 2021
Restructuring Costs [Abstract]
Restructuring and Related Activities Disclosure [Text Block]Restructuring Costs The Company's results of operations for both the three months ended April 1, 2021 and the three months ended April 2, 2020 include restructuring costs related to actions the Company has taken to align costs to updated production levels that have been directed by the Company's customers (restructuring activity). Largely beginning in the three month period ended April 2, 2020, the Company's customers, including Boeing and Airbus, significantly reduced their overall production rates as a result of the COVID-19 pandemic and, in the case of Boeing, the B737 MAX grounding. The restructuring activity materially affected the scope of operations and manner in which business is conducted by the Company compared to periods prior to the restructuring activities. Restructuring costs are presented separately as a component of operating loss on the Condensed Consolidated Statement of Operations. The total restructuring costs of $2.1 for the three months ended April 1, 2021 includes cost related to McAlester and San Antonio site closures. For the three months ended April 2, 2020, total restructuring costs of $42.6 were comprised of $31.5 related to involuntary workforce reductions and $11.1 related to a VRP. Of the $2.1 total restructuring cost for the three months ended April 1, 2021, $1.2 was paid during the three-month period ended April 1, 2021 and the remaining $0.9 is recorded in the accrued expenses line item on the balance sheet as of April 1, 2021.

Acquisition (Notes)

Acquisition (Notes)3 Months Ended
Apr. 01, 2021
Business Combinations [Abstract]
Asco Acquisition [Text Block]Asco On May 1, 2018, the Company and its wholly-owned subsidiary Spirit AeroSystems Belgium Holdings BVBA (“Spirit Belgium”) entered into a definitive agreement (as amended, the “Asco Purchase Agreement”) with certain private sellers providing for the purchase by Spirit Belgium of all of the issued and outstanding equity of S.R.I.F. N.V., the parent company of Asco Industries N.V. (“Asco”), subject to certain customary closing adjustments, including foreign currency adjustments (the “Asco Acquisition”). On September 25, 2020, the Company, Spirit Belgium and the Sellers entered into an amendment to the Asco Purchase Agreement (the “Termination Agreement”) pursuant to which the parties agreed to terminate the Asco Purchase Agreement, including all schedules and annexes thereto (other than certain confidentiality agreements) (collectively with the Asco Purchase Agreement, the “Transaction Documents”), effective as of September 25, 2020. Under the Termination Agreement, the parties also agreed to release each other from any and all claims, rights of action, howsoever arising, of every kind and nature, in connection with, arising out of, based upon or related to, directly or indirectly, the Transaction Documents, including any breach, non-performance, action or failure to act under the Transaction Documents.

New Accounting Pronouncements (

New Accounting Pronouncements (Policies)3 Months Ended
Apr. 01, 2021
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]. New Accounting Pronouncements In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reportin

Accounts Receivable and Allow_2

Accounts Receivable and Allowance for Credit Losses Allowance for Credit Losses (Policies)3 Months Ended
Apr. 01, 2021
Credit Loss [Abstract]
Credit Loss, Financial Instrument [Text Block]Allowance for Credit Losses Management assesses and records an allowance for credit losses on financial assets within the scope of ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), using the Current Expected Credit Losses (“CECL”) model. The amount necessary to adjust the allowance for credit losses to management’s current estimate, as of the reporting date, on these as sets is recorded in net income as credit loss expense. All credit losses reported in accordance with ASU 2016-13 were on trade receivables and/or contract assets arising from the Company’s contracts with customers. In determining the appropriate methodology to use within the CECL model for receivables and contract assets arising from the Company’s contracts with customers, the Company considered the risk characteristics of the applicable assets. Spirit segregated the trade receivables and contract assets into “pools” of assets at the major customer level. The Company's assessment was based on similarity of risk characteristics shared by these pool of assets. Management observed that risks for collectability, with regard to the trade receivables and contract assets resulting from contracts with customers include: macro level economic conditions that impact all of Spirit’s customers, macro level market conditions that could impact Spirit’s customers in certain aircraft categories, certain customer specific market conditions, certain customer specific economic conditions, and certain customer specific administrative conditions. The Company selected a loss-rate method for the CECL model, based on the relationship between historical write-offs of receivables and the underlying sales by major customer. Utilizing this model, a historical loss-rate is applied against the amortized cost of applicable assets, at the time the asset is established. The loss rate reflects the Company’s current estimate of the risk of loss (even when that risk is remote) over the expected remaining contractual life of the assets. The Company's policy is to deduct write-offs from the allowance for credit losses account in the period in which the financial assets are deemed uncollectible.

Leases (Policies)

Leases (Policies)3 Months Ended
Apr. 01, 2021
Leases [Abstract]
Lessee, Leases [Policy Text Block]The Company determines if an arrangement is a lease at the inception of a signed agreement. Operating leases are included in right-of-use (“ROU”) assets (long-term), short-term operating lease liabilities, and long-term operating lease liabilities on the Company’s consolidated balance sheet. Finance leases are included in Property, Plant and Equipment, current maturities of long-term debt, and long-term debt. ROU assets represent the right of the Company to use an underlying asset for the length of the lease term, and lease liabilities represent the Company’s obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. To determine the present value of lease payments, the Company uses its estimated incremental borrowing rate or the implicit rate, if readily determinable. The estimated incremental borrowing rate is based on information available at the lease commencement date, including any recent debt issuances and publicly available data for instruments with similar characteristics. The ROU asset also includes any lease payments made and excludes lease incentives. The Company's lease terms may include options to extend or terminate the lease and, when it is reasonably certain that an option will be exercised, those options are included in the net present value calculation. Leases with a term of 12 months or less, which are primarily related to automobiles and manufacturing equipment, are not recorded on the balance sheet. The aggregate amount of lease cost for leases with a term of 12 months or less is not material.

Other Assets goodwill (Policies

Other Assets goodwill (Policies)3 Months Ended
Apr. 01, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets Disclosure [Text Block]Goodwill is summarized as follows: April 1, December 31, Goodwill (1) $ 583.9 $ 565.3 (1) The Bombardier Acquisition (as defined below) on October 30, 2020 resulted in the establishment of $486.8 of goodwill included in the balance reported at December 31, 2020, which was adjusted to $505.3 as of April 1, 2021 as a result of certain purchase price allocation adjustments recorded during the purchase price accounting measurement period based on additional information obtained. S ee also Note 24, Acquisitions. A s of April 1, 2021 , given the preliminary nature of the Bombardier Acquisition purchase price allocation, the Company has not yet allocated goodwill to the relevant reportable segments. The total goodwill value includes no accumulated impairment loss in any of the periods present ed. The goodwill balance as of April 1, 2021 excluding the balance of $505.3 resulting from the Bombardier Acquisition, was allocated $42.9 to the Fuselage Systems Segment, $33.1 to the Propulsion Systems Segment, and $2.6 to the Wing Systems Segment. The balance of goodwill by reportable segment as of December 31, 2020, excluding the balance of $486.8 resulting from the Bombardier Acquisition noted above, was $42.9 for the Fuselage Systems segment, $33.1 for the Propulsion Systems segment, and $2.5 for the Wing Systems segment. The change in the Wing Systems segment goodwill balance from December 31, 2020 reflects net exchange rate differences arising during the period. The Company assesses goodwill for impairment annually or more frequently if events or circumstances indicate that the fair value of a reporting unit that includes goodwill may be lower than its carrying value. F or the period ended April 1, 2021, there were no events or circumstances which would require the Company to update its goodwill impairment analysis. Intangible assets are summarized as follows: April 1, December 31, Intangible assets Patents $ 2.0 $ 2.0 Favorable leasehold interests 2.8 2.8 Developed technology asset (1)(2) 92.0 94.0 Customer relationships intangible asset (2) 121.1 124.1 Other 0.2 — Total intangible assets $ 218.1 $ 222.9 Less: Accumulated amortization - patents (2.0) (2.0) Accumulated amortization - favorable leasehold interest (1.8) (1.8) Accumulated amortization - developed technology asset (4.2) (2.6) Accumulated amortization - developed technology asset (3.1) (1.3) Intangible assets, net $ 207.0 $ 215.2 (1) The acquisition of Fiber Materials Inc. on January 10, 2020 resulted in the establishment of a $30.0 intangible asset for developed technology. (2) The Bombardier Acquisition resulted in the establishment of a $64.0 intangible asset for developed technology and a $124.1 intangible asset for customer relationships, which have been adjusted to $62.0 for intangible asset for developed technology and $121.1 for customer relationships related to the goodwill adjustment described above. See also Note 24, Acquisitions. The amortization for each of the five succeeding years relating to intangible assets currently recorded in the Condensed Consolidated Balance sheet and the weighted average amortization is estimated to be the following as of April 1, 2021: Year Patents Favorable leasehold interest Developed Technology Total remaining in 2021 $ 0.1 $ 4.6 $ 5.0 $ 9.7 2022 0.1 6.1 6.8 13.0 2023 0.1 6.1 6.8 13.0 2024 0.1 6.1 6.8 13.0 2025 0.1 6.1 6.8 13.0 2026 0.1 6.1 6.8 13.0 Weighted average amortization period 8.3 years 14.3 years 17.6 years 16.2 years

Changes in Estimates Changes in

Changes in Estimates Changes in Estimates (Tables)3 Months Ended
Apr. 01, 2021
Accounting Changes and Error Corrections [Abstract]
Schedule of Change in Accounting Estimate [Table Text Block]Changes in estimates are summarized below: For the Three Months Ended Changes in Estimates April 1, 2021 April 2, 2020 (Unfavorable) Favorable Cumulative Catch-up Adjustment by Segment Fuselage $ 1.9 $ (4.0) Propulsion (5.6) (1.5) Wing (2.1) (2.7) Total (Unfavorable) Favorable Cumulative Catch-up Adjustment $ (5.8) $ (8.2) Changes in Estimates on Loss Programs (Forward Loss) by Segment Fuselage $ (55.1) $ (13.2) Propulsion (4.7) (3.1) Wing (12.6) (3.4) Total Changes in Estimates (Forward Loss) on Loss Programs $ (72.4) $ (19.7) Total Change in Estimate $ (78.2) $ (27.9) EPS Impact (diluted per share based upon 2021 forecasted effective tax rate) $ (0.74) $ (0.17)

Accounts Receivable, net (Table

Accounts Receivable, net (Tables)3 Months Ended
Apr. 01, 2021
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts Receivable, NetAccounts receivable, net consists of the following: April 1, December 31, Trade receivables $ 498.8 $ 458.9 Other 33.4 31.1 Less: allowance for credit losses (6.4) (5.6) Accounts receivable, net $ 525.8 $ 484.4

Revenue (Tables)

Revenue (Tables) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Disaggregation of Revenue [Line Items]
Revenues $ 900.8 $ 1,077.3
Boeing [Member]
Disaggregation of Revenue [Line Items]
Revenues467.9 676.1
Airbus [Member]
Disaggregation of Revenue [Line Items]
Revenues231.6 287.2
Other Customer [Member]
Disaggregation of Revenue [Line Items]
Revenues201.3 114
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues624.2 782.5
UNITED KINGDOM
Disaggregation of Revenue [Line Items]
Revenues136.3 184.1
Other International [Member]
Disaggregation of Revenue [Line Items]
Revenues140.3 110.7
Total International [Member]
Disaggregation of Revenue [Line Items]
Revenues $ 276.6 $ 294.8

Inventory (Tables)

Inventory (Tables)3 Months Ended
Apr. 01, 2021
Inventory Disclosure [Abstract]
Summary Of InventoriesWork-in-process inventory includes direct labor, direct material, overhead, and purchases on contracts for which revenue is recognized at a point in time as well as sub-assembly parts that have not been issued to production on contracts for which revenue is recognized using the input method. For the periods ended April 1, 2021 and December 31, 2020, work-in-process inventory includes $365.0 and $351.2, respectively, of costs incurred in anticipation of specific contracts and no impairments were recorded in the period. Product inventory, summarized in the table above, is shown net of valuation reserves of $56.7 and $56.8 as of April 1, 2021 and December 31, 2020, respectively. Excess capacity and abnormal production costs are excluded from inventory and recognized as expense in the period incurred. Cost of sales for three months ended April 1, 2021 includes period expense of $67.6 for excess capacity production costs related to temporary B737 MAX, A220 and A320 production schedule changes. Cost of sales also includes abnormal costs related to temporary workforce adjustments as a result of COVID-19 production pause, net of the U.S. employee retention credit and U.K. government subsidies for the three months ended April 1, 2021 of $2.1.

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)3 Months Ended
Apr. 01, 2021
Property, Plant and Equipment [Abstract]
Property, plant and equipment, netProperty, plant and equipment, net consists of the following: April 1, December 31, Land $ 30.9 $ 30.8 Buildings (including improvements) 1,196.5 1,166.7 Machinery and equipment 2,128.0 2,120.5 Tooling 1,042.2 1,036.1 Capitalized software 282.6 282.5 Construction-in-progress 204.9 220.0 Total 4,885.1 4,856.6 Less: accumulated depreciation (2,428.1) (2,352.8) Property, plant and equipment, net $ 2,457.0 $ 2,503.8

Other Assets (Tables)

Other Assets (Tables)3 Months Ended
Apr. 01, 2021
Other Assets, Noncurrent [Abstract]
Schedule of Other AssetsOther current assets are summarized as follows: April 1, December 31, Prepaid expenses $ 26.3 $ 16.3 Income tax receivable 312.4 315.3 Other assets- short term 5.8 4.7 Total other current assets $ 344.5 $ 336.3 Other assets are summarized as follows: April 1, December 31, Deferred financing Deferred financing costs $ 0.9 $ 0.9 Less: Accumulated amortization - deferred financing costs (0.5) (0.5) Deferred financing costs, net $ 0.4 $ 0.4 Other Supply agreements (1) $ 10.7 $ 11.4 Equity in net assets of affiliates 2.7 3.1 Restricted cash - collateral requirements 19.5 19.5 Other 56.0 49.2 Total other long term assets $ 89.3 $ 83.6 (1) Certain payments accounted for as consideration paid by the Company to a customer are being amortized as reductions to net revenues.

Other Assets Intangible Assets

Other Assets Intangible Assets (Tables)3 Months Ended
Apr. 01, 2021
Finite-Lived Intangible Assets [Line Items]
Schedule of Finite-Lived Intangible Assets [Table Text Block]Intangible assets are summarized as follows: April 1, December 31, Intangible assets Patents $ 2.0 $ 2.0 Favorable leasehold interests 2.8 2.8 Developed technology asset (1)(2) 92.0 94.0 Customer relationships intangible asset (2) 121.1 124.1 Other 0.2 — Total intangible assets $ 218.1 $ 222.9 Less: Accumulated amortization - patents (2.0) (2.0) Accumulated amortization - favorable leasehold interest (1.8) (1.8) Accumulated amortization - developed technology asset (4.2) (2.6) Accumulated amortization - developed technology asset (3.1) (1.3) Intangible assets, net $ 207.0 $ 215.2 (1) The acquisition of Fiber Materials Inc. on January 10, 2020 resulted in the establishment of a $30.0 intangible asset for developed technology. (2) The Bombardier Acquisition resulted in the establishment of a $64.0 intangible asset for developed technology and a $124.1 intangible asset for customer relationships, which have been adjusted to $62.0 for intangible asset for developed technology and $121.1 for customer relationships related to the goodwill adjustment described above. See also Note 24, Acquisitions.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]The amortization for each of the five succeeding years relating to intangible assets currently recorded in the Condensed Consolidated Balance sheet and the weighted average amortization is estimated to be the following as of April 1, 2021: Year Patents Favorable leasehold interest Developed Technology Total remaining in 2021 $ 0.1 $ 4.6 $ 5.0 $ 9.7 2022 0.1 6.1 6.8 13.0 2023 0.1 6.1 6.8 13.0 2024 0.1 6.1 6.8 13.0 2025 0.1 6.1 6.8 13.0 2026 0.1 6.1 6.8 13.0 Weighted average amortization period 8.3 years 14.3 years 17.6 years 16.2 years

Other Assets Goodwill (Tables)

Other Assets Goodwill (Tables)3 Months Ended
Apr. 01, 2021
Goodwill [Abstract]
Goodwill Disclosure [Text Block]Goodwill is summarized as follows: April 1, December 31, Goodwill (1) $ 583.9 $ 565.3 (1) The Bombardier Acquisition (as defined below) on October 30, 2020 resulted in the establishment of $486.8 of goodwill included in the balance reported at December 31, 2020, which was adjusted to $505.3 as of April 1, 2021 as a result of certain purchase price allocation adjustments recorded during the purchase price accounting measurement period based on additional information obtained. S ee also Note 24, Acquisitions. A s of April 1, 2021 , given the preliminary nature of the Bombardier Acquisition purchase price allocation, the Company has not yet allocated goodwill to the relevant reportable segments. The total goodwill value includes no accumulated impairment loss in any of the periods present ed. The goodwill balance as of April 1, 2021 excluding the balance of $505.3 resulting from the Bombardier Acquisition, was allocated $42.9 to the Fuselage Systems Segment, $33.1 to the Propulsion Systems Segment, and $2.6 to the Wing Systems Segment. The balance of goodwill by reportable segment as of December 31, 2020, excluding the balance of $486.8 resulting from the Bombardier Acquisition noted above, was $42.9 for the Fuselage Systems segment, $33.1 for the Propulsion Systems segment, and $2.5 for the Wing Systems segment. The change in the Wing Systems segment goodwill balance from December 31, 2020 reflects net exchange rate differences arising during the period.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)3 Months Ended
Apr. 01, 2021
Fair Value Disclosures [Abstract]
Fair Value MeasurementsThe guidance discloses three levels of inputs that may be used to measure fair value: Level 1 Quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 1 assets and liabilities include debt and equity securities and derivative contracts that are traded in an active exchange market. Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 2 assets and liabilities include debt securities with quoted prices that are traded less frequently than exchange-traded instruments and derivative contracts whose value is determined using a pricing model with inputs that are observable in the market or can be derived principally from or corroborated by observable market data. Observable inputs, such as current and forward interest rates and foreign exchange rates, are used in determining the fair value of the interest rate swaps and foreign currency hedge contracts. Level 3 Unobservable inputs that are supported by little or no market activity and are significant to the fair value of assets and liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.
Carrying Amount And Estimated Fair Value Of Long Term DebtThe following table presents the carrying amount and estimated fair value of long-term debt: April 1, 2021 December 31, 2020 Carrying Fair Carrying Fair Senior secured term loan B (including current portion) $ 389.2 $ 393.6 (2) $ 389.6 $ 395.0 (2) Floating rate notes — — 299.7 297.5 (1) Senior notes due 2023 298.9 296.4 (1) 298.8 293.8 (1) Senior secured first lien notes due 2025 494.2 522.9 (1) 493.9 521.2 (1) Senior secured second lien notes due 2025 1,185.1 1,280.4 (1) 1,184.2 1,279.1 (1) Senior notes due 2026 298.2 310.0 (1) 298.1 313.9 (1) Senior notes due 2028 694.8 683.5 (1) 694.6 689.2 (1) Total $ 3,360.4 $ 3,486.8 $ 3,658.9 $ 3,789.7 (1) Level 1 Fair Value hierarchy

Debt (Tables)

Debt (Tables)3 Months Ended
Apr. 01, 2021
Debt Disclosure [Abstract]
Long Term Debt And Capital Lease Obligations Current And Non CurrentTotal debt shown on the balance sheet is comprised of the following: April 1, 2021 December 31, 2020 Current Noncurrent Current Noncurrent Senior secured term loan B $ 3.9 $ 385.3 $ 3.9 $ 385.7 Floating Rate Notes — — 299.7 — Senior notes due 2023 — 298.9 — 298.8 Senior secured first lien notes due 2025 — 494.2 — 493.9 Senior secured second lien notes due 2025 — 1,185.1 — 1,184.2 Senior notes due 2026 — 298.2 — 298.1 Senior notes due 2028 — 694.8 — 694.6 Present value of finance lease obligations 35.0 113.0 35.3 121.5 Other 1.3 55.7 1.8 56.1 Total $ 40.2 $ 3,525.2 $ 340.7 $ 3,532.9

Pension and Other Post-Retire_2

Pension and Other Post-Retirement Benefits (Tables)3 Months Ended
Apr. 01, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Change in projected benefit obligations Defined Benefit Plans For the Three Components of Net Periodic Pension Expense/(Income) April 1, April 2, Service cost $ 10.8 $ 0.2 Interest cost 13.7 8.0 Expected return on plan assets (39.4) (17.3) Curtailment loss (gain) (2) — 33.0 Special termination benefits (1) — 24.7 Net periodic pension expense (income) $ (14.9) $ 48.6 Other Benefits For the Three Components of Other Benefit Expense April 1, April 2, Service cost $ 0.2 $ 0.3 Interest cost 0.1 0.2 Amortization of prior service cost (0.2) (0.2) Amortization of net gain (0.4) (0.5) Curtailment (gain) loss (2) — (0.3) Special termination benefits (1) — 11.8 Net periodic other benefit expense (income) $ (0.3) $ 11.3 (1) Special termination benefits for the three months ended April 2, 2020 is a combination of pension value plan, postretirement medical plan, and settlement accounting changes offset by a reduction in the Company's net benefit obligation. Due to settlement accounting, the Company remeasured the pension assets and obligations and retiree medical which resulted in a $116.8 and $4.3 impact to Other Comprehensive Income ("OCI"), respectively. This impact is included in the Company’s Condensed Consolidated Statements of Comprehensive Income (Loss). (2) Curtailment loss in the three months ended April 2, 2020 occurred as result of the Company’s Voluntary Retirement Program ("VRP") offered to eligible employees during the first quarter of 2020 and is included in other (expense) income in the Company's Condensed Consolidated Statements of Operations.

Equity (Tables)

Equity (Tables)3 Months Ended
Apr. 01, 2021
Stockholders' Equity Note [Abstract]
Basic and Diluted Earnings per shareThe following table sets forth the computation of basic and diluted earnings per share: For the Three Months Ended April 1, 2021 April 2, 2020 Income Shares Per Share Income Shares Per Share Basic EPS Loss available to common stockholders $ (171.6) 104.1 $ (1.65) $ (162.9) 103.7 $ (1.57) Income allocated to participating securities — — (0.1) — Net loss $ (171.6) $ (163.0) Diluted potential common shares — Diluted EPS Net loss $ (171.6) 104.1 $ (1.65) $ (163.0) 103.7 $ (1.57) Included in the outstanding Common Stock were 1.3 million and 1.5 million of issued but unvested shares at April 1, 2021 and April 2, 2020, respectively, which are excluded from the basic Earnings Per Share ("EPS") calculation. Common shares of 1.3 million and 0.7 million, respectively, were excluded from diluted EPS as a result of incurring a net loss for the three months ended April 1, 2021 and April 2, 2020, as the effect would have been antidilutive. Additionally, diluted EPS for the three months ended April 1, 2021
Schedule of Accumulated Other Comprehensive Income (Loss)Accumulated Other Comprehensive Loss is summarized by component as follows: As of As of April 1, 2021 December 31, 2020 Pension $ (116.5) $ (112.0) Interest swaps — (0.9) SERP/Retiree medical 14.0 14.5 Derivatives - foreign currency hedge 1.2 — Foreign currency impact on long term intercompany loan (11.2) (11.8) Currency translation adjustment (37.5) (43.9) Total accumulated other comprehensive loss $ (150.0) $ (154.1)

Commitments, Contingencies an_2

Commitments, Contingencies and Guarantees (Tables)3 Months Ended
Apr. 01, 2021
Commitments Contingencies And Guarantees [Abstract]
Service warranty roll forwardThe following is a roll forward of the service warranty and extraordinary rework balance at April 1, 2021: Balance, December 31, 2020 $ 76.9 Charges (release) to costs and expenses (0.3) Payouts (1.0) Exchange rate — Balance, April 1, 2021 $ 75.6

Other Income (Expense), Net (Ta

Other Income (Expense), Net (Tables)3 Months Ended
Apr. 01, 2021
Other Nonoperating Income (Expense) [Abstract]
Other Income Expense NetOther (expense) income, net is summarized as follows: For the Three April 1, April 2, Kansas Development Finance Authority bond $ 0.9 $ 1.1 Interest income 0.6 6.9 Foreign currency (losses) gains (1) (8.9) 5.4 Loss on foreign currency contract and interest rate swaps (0.8) 0.1 Loss on sale of accounts receivable (1.6) (3.1) Pension income (loss) (2) 26.1 (59.6) ASC 326 credit loss reserve (1.0) — Intangible assets amortization (2.3) — Other (0.2) 0.2 Total $ 12.8 $ (49.0)

Acquisition (Tables)

Acquisition (Tables)3 Months Ended
Apr. 01, 2021
Acquisition [Abstract]
Asco Acquisition [Text Block]Asco On May 1, 2018, the Company and its wholly-owned subsidiary Spirit AeroSystems Belgium Holdings BVBA (“Spirit Belgium”) entered into a definitive agreement (as amended, the “Asco Purchase Agreement”) with certain private sellers providing for the purchase by Spirit Belgium of all of the issued and outstanding equity of S.R.I.F. N.V., the parent company of Asco Industries N.V. (“Asco”), subject to certain customary closing adjustments, including foreign currency adjustments (the “Asco Acquisition”). On September 25, 2020, the Company, Spirit Belgium and the Sellers entered into an amendment to the Asco Purchase Agreement (the “Termination Agreement”) pursuant to which the parties agreed to terminate the Asco Purchase Agreement, including all schedules and annexes thereto (other than certain confidentiality agreements) (collectively with the Asco Purchase Agreement, the “Transaction Documents”), effective as of September 25, 2020. Under the Termination Agreement, the parties also agreed to release each other from any and all claims, rights of action, howsoever arising, of every kind and nature, in connection with, arising out of, based upon or related to, directly or indirectly, the Transaction Documents, including any breach, non-performance, action or failure to act under the Transaction Documents.
BBD Acquisition [Text Block]Bombardier On October 30, 2020, Spirit and Spirit AeroSystems Global Holdings Limited, wholly owned subsidiaries of the Company, completed their previously announced acquisition of the outstanding equity of Short Brothers plc (“Shorts”) and Bombardier Aerospace North Africa SAS, and substantially all the assets of the maintenance, repair and overhaul business in Dallas, Texas (collectively, the “Bombardier Acquired Business”), along with the assumption of certain liabilities of Shorts and BANA (the “Bombardier Acquisition”). The Bombardier Acquired Businesses are global leaders in aerostructures and fabrication, delivering composite and metallic wing components, nacelles, fuselages and tail assemblies, along with high-value mechanical assemblies made out of aluminum, titanium and steel. The backlog of work includes long-term contracts on the Airbus aircraft family, along with Bombardier business and regional jets. The acquisition is in line with the Company’s growth strategy of increasing Airbus content, developing low-cost country footprint, and growing the Company’s aftermarket business. The Bombardier Acquired Businesses are included within the Fuselage Systems, Propulsion Systems, and Wing Systems reporting segments. Refer to Note 22, Segment Information for additional information about the Company’s segments. The Company, acting through certain of its subsidiaries, also assumed net pension liabilities of approximately $316. As a result of the acquisition of the acquired Bombardier Business, Spirit assumed financial obligations related to a repayable investment agreement with the Department for Business, Energy and Industrial Strategy of the Government of the United Kingdom. As a result of its obligation to make future payments under this agreement, the Company recorded the assumed obligation from this transaction as a liability on its Consolidated Balance Sheet that will be accounted for using the interest method over the estimated life of the agreement. As a result, the Company imputes interest on the transaction and recorded imputed interest expense at the estimated interest rate. The Company's estimate of the interest rate under the agreement is based on the amount of payments expected to be made over the remaining life of the agreement. The Company utilizes future sales projections and growth rates to further develop this estimate. The projected amount of payments expected to be made involves the use of significant estimates and assumptions with respect to the number of units expected to be sold. The Company periodically assesses the expected payments to be made using a combination of historical results and forecasts from market data sources. To the extent such payments are greater or less than its initial estimates or the timing of such payments is materially different than its original estimates, the Company will adjust the amortization of the liability prospectively. The Company determined the fair value of the liability at the acquisition date to be $304 which is included within the liabilities assumed, with a current effective annual imputed interest rate of 6.78%. Cash payments made related to the principal component of the liability will be classified as a financing outflow on the Consolidated Statement of Cash Flows, while payments made related to the interest component will be presented within operating cash flows. The $275 cash consideration, along with these assumed liabilities, results in a total enterprise value of $895. The Company agreed to procure payment of a special contribution of £100 to the Shorts pension scheme on October 30, 2021. In addition, included within the liabilities assumed is approximately $292.5 in forward loss contracts. Refer to Note 4 Changes in Estimates for additional information on the Company’s forward loss provisions. Acquisition-related expenses were $1.3 and $1.0 for the three months ended April 1, 2021 and April 2, 2020, respectively, and are included in selling, general and administrative costs on the Condensed Consolidated Statement of Operations. The acquisition was accounted for as a business combination in accordance with ASC Topic 805, Business Combinations . The purchase price has been allocated among assets acquired and liabilities assumed at fair value based on information currently available, with the excess purchase price recorded as goodwill. Determining the fair value of assets acquired and liabilities assumed requires significant judgment, including the amount and timing of expected future cash flows, long-term growth rates and discount rates. In some cases, the Company used discounted cash flow analyses, which were based on the Company's best estimate of future sales, earnings and cash flows after considering such factors as general market conditions, customer budgets, existing firm and future orders, changes in working capital, long term business plans and recent operating performance. Use of different estimates and judgments could yield materially different results. The Company also identified contractual obligations with customers on certain contracts with economic returns that are lower than could be realized in market transactions as of the acquisition date. The Company measured these liabilities under the measurement provisions of FASB ASC Topic 820, “Fair Value Measurements and Disclosures,” which is based on the price to transfer the obligation to a market participant at the measurement date, assuming that the liability will remain outstanding in the marketplace. Significant assumptions were used to determine the fair value of the loss contract reserves using the discounted cash flow model including discount rates, forecasted quantities of products to be sold under the long-term contracts and market prices for respective products. These were forward looking assumptions that could be affected by future economic and market conditions. Based on the estimated net cash outflows of the programs plus a reasonable contracting profit margin required to transfer the contracts to market participants, the Company recorded assumed liabilities of approximately $292.5 in connection with the Bombardier Acquisition. These liabilities are shown within the Forward loss provision on the Consolidated Balance Sheet for the period ended April 1, 2021. These liabilities will be liquidated in accordance with the underlying pattern of obligations, as reflected by the expenses incurred on the contracts, as a reduction to cost of sales. Total consumption of the contractual obligation in 2020 was $7.2. Total consumption of the contractual obligation for the next five year, based upon the assumptions referenced above is expected to be as follows: $16.1 in 2021, $45.9 in 2022, $71.5 in 2023, $85.0 in 2024, and $66.8 in 2025. The Company expects to substantially finalize its purchase price allocation by October 30, 2021 after the Company further analyzes and assesses a number of the factors used in establishing the fair values of assets acquired and liabilities assumed as of the Bombardier Acquisition date including, but not limited to, contractual and operational factors underlying the customer-related intangible assets and property, plant and equipment; details surrounding tax matters; and assumptions underlying certain existing or potential reserves, such as those for product warranties and environmental matters. Based on additional information obtained during the three month measurement period ended April 1, 2021, the Company recognized the following adjustments to its preliminary purchase price allocation, which are included below: Intangible assets decreased by $5.0, forward loss liability increased by $10.9, accounts receivable decreased by $2.2 and inventory decreased by $0.4. As a result of these adjustments, as of April 1, 2021, the recognized goodwill was adjusted from $486.8 to $505.3. There were no measurement period adjustments materially impacting earnings that would have been recorded in previous reporting periods if the adjustments had been recognized as of the acquisition date. The final fair value determination could result in material adjustments to the values presented in the preliminary purchase price allocation table below. The preliminary purchase price allocation of the assets acquired and the liabilities assumed at the acquisition date is as follows: At October 30, 2020 Cash and cash equivalents $ 4.4 Accounts receivable, net 91.9 Inventory 251.6 Other current assets 11.1 Intangible assets, net 183.1 Other non-current assets 11.7 Property and equipment, net 373.6 Right of use asset 27.7 Goodwill 505.3 Total assets acquired $ 1,460.4 Accounts payable $ 90.4 Accrued payroll and employee benefits 113.8 Forward loss provision, short-term 23.3 Other current liabilities 31.5 Forward loss provision, long-term 269.2 Other non-current liabilities 313.4 Operating lease liabilities, long-term 27.5 Retirement benefits 316.3 Total liabilities assumed $ 1,185.4 Net assets acquired $ 275.0 The preliminary amounts allocated to the intangible assets identified are as consist of the follows: Amount Amortization Period (in years) Developed Technology $ 62.0 15.0 Customer Relationships $ 121.1 18.0 Total intangible assets $ 183.1 The customer relationships intangible asset consists of estimated future revenues. The customer relationships intangible asset was valued using the excess earnings method (income approach) in which the value is derived from an estimation of the after-tax cash flows specifically attributable to the customer relationships. The analysis included assumptions for projections of revenues and expenses, contributory asset charges, discount rates, and a tax amortization benefit. The developed technology intangible asset was valued using the relief from royalty method (income approach) in which the value is derived by estimation of the after-tax royalty savings attributable to owning the assets. Assumptions in this analysis included projections of revenues, royalty rates representing costs avoided due to ownership of the assets, discount rates, and a tax amortization benefit. The goodwill recognized is attributable primarily to expected synergies and intangible assets that do not qualify for separate recognition, such as the acquired assembled workforce. We expect $24.8 of the goodwill to be deductible for income tax purposes. As of April 1, 2021, given the preliminary nature of the Bombardier Acquisition purchase price allocation and time constraints, the Company has not yet allocated goodwill to the relevant reporting units and or reportable segments. The results of operations of the Bombardier Acquired Businesses are included in the Company’s Consolidated Statements of Operations for the three months ended April 1, 2021. The following summary, prepared on a pro-forma basis, represents the unaudited consolidated results of operations for the three months ended April 1, 2021 and April 2, 2020 as if the Bombardier Acquisition had been completed as of January 1, 2020. The pro-forma results include the impact of any post-acquisition adjustments directly attributable to the acquisition and the impact of adjustments such as the recognition of additional depreciation and amortization expense, and the related income tax effects. This pro-forma presentation does not include any impact of transaction synergies. The pro-forma results are not necessarily indicative of what the results of operations would have been had the Bombardier Acquisition occurred during the periods presented, nor does they purport to represent results for any future periods. For the Three Months Ended April 1, April 2, Revenue - as reported $ 900.8 $ 1,077.3 Revenue - pro-forma 900.8 1,226.7 Net (loss) income - as reported $ (171.6) $ (163.0) Net (loss) income - pro-forma (171.6) (152.3) Earnings Per Share - Diluted - as reported $ (1.65) $ (1.57) Earnings Per Share - Diluted - pro-forma (1.65) (1.47)

Changes in Estimates (Details)

Changes in Estimates (Details) - USD ($) $ / shares in Units, $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Change In Estimate [Line Items]
Changes in Contract Estimates, aggregate, Affecting earnings from Continuing Operations, per Share diluted $ (0.74) $ (0.17)
Change In Accounting Estimate, aggregate $ (78.2) $ (27.9)
Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting(5.8)(8.2)
Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting(72.4)(19.7)
Fuselage Systems [Member] | Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting1.9 (4)
Fuselage Systems [Member] | Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting(55.1)(13.2)
Wing Systems [Member] | Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting(2.1)(2.7)
Wing Systems [Member] | Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting(12.6)(3.4)
Propulsion Systems [Member] | Cumulative catch-up adjustment [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting(5.6)(1.5)
Propulsion Systems [Member] | Forward Loss [Member]
Change In Estimate [Line Items]
Change in Accounting Estimate - Contract Accounting $ (4.7) $ (3.1)

Accounts Receivable, net (Detai

Accounts Receivable, net (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020Dec. 31, 2020
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized $ 455.1
Trade receivables498.8 $ 458.9
Other33.4 31.1
Less: allowance for doubtful accounts(6.4)(5.6)
Accounts receivable, net525.8 $ 484.4
Gain (Loss) on Sale of Accounts Receivable $ 1.6 $ 3.1

Contract with customer, asset_2

Contract with customer, asset and liability (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020Dec. 31, 2020Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues $ 900.8 $ 1,077.3
Contract with Customer, Liability, Revenue Recognized $ 62 33.1
Disaggregation of Revenue [Table Text Block]Disaggregation of Revenue The Company disaggregates revenue based on the method of measuring satisfaction of the performance obligation either over time or at a point in time, based upon the location where products and services are transferred to the customer, and based upon major customer. The Company’s principal operating segments and related revenue are noted in Note 22, Segment Information . The following tables show disaggregated revenues for the periods ended April 1, 2021 and April 2, 2020: For the Three Revenue April 1, April 2, Contracts with performance obligations satisfied over time $ 649.2 $ 605.9 Contracts with performance obligations satisfied at a point in time 251.6 471.4 Total Revenue $ 900.8 $ 1,077.3 The following table disaggregates revenue by major customer: For the Three Customer April 1, April 2, Boeing $ 467.9 $ 676.1 Airbus 231.6 287.2 Other 201.3 114.0 Total Revenue $ 900.8 $ 1,077.3 The following table disaggregates revenue based upon the location where control of products are transferred to the customer: For the Three Location April 1, April 2, United States $ 624.2 $ 782.5 International United Kingdom 136.3 184.1 Other 140.3 110.7 Total International 276.6 294.8 Total Revenue $ 900.8 $ 1,077.3
Contract with Customer, Liability, Revenue Recognized $ 62 33.1
Contract with Customer, Asset, before Allowance for Credit Loss367.8 391.3 $ 372.8 $ 534.7
change in contract asset(5)(143.4)
Contract with Customer, Liability(467.8)(555.8) $ (469.6) $ (514.6)
change in contract liability1.8 (41.2)
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues649.2 605.9
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues $ 251.6 $ 471.4

Revenue (Details)

Revenue (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Disaggregation of Revenue [Table Text Block]Disaggregation of Revenue The Company disaggregates revenue based on the method of measuring satisfaction of the performance obligation either over time or at a point in time, based upon the location where products and services are transferred to the customer, and based upon major customer. The Company’s principal operating segments and related revenue are noted in Note 22, Segment Information . The following tables show disaggregated revenues for the periods ended April 1, 2021 and April 2, 2020: For the Three Revenue April 1, April 2, Contracts with performance obligations satisfied over time $ 649.2 $ 605.9 Contracts with performance obligations satisfied at a point in time 251.6 471.4 Total Revenue $ 900.8 $ 1,077.3 The following table disaggregates revenue by major customer: For the Three Customer April 1, April 2, Boeing $ 467.9 $ 676.1 Airbus 231.6 287.2 Other 201.3 114.0 Total Revenue $ 900.8 $ 1,077.3 The following table disaggregates revenue based upon the location where control of products are transferred to the customer: For the Three Location April 1, April 2, United States $ 624.2 $ 782.5 International United Kingdom 136.3 184.1 Other 140.3 110.7 Total International 276.6 294.8 Total Revenue $ 900.8 $ 1,077.3
Revenues $ 900.8 $ 1,077.3
Remaining in Current Year [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount2,115.3
2021 [Member] [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount3,317.2
2022 [Member] [Member] [Domain]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount4,310.2
2021 and after [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Amount3,258
Transferred over Time [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenues649.2 605.9
Transferred at Point in Time [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenues251.6 471.4
Boeing [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenues467.9 676.1
Airbus [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenues231.6 287.2
Other Customer [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenues $ 201.3 $ 114

Inventory (Details)

Inventory (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Dec. 31, 2020
Summary Of Inventories [Abstract]
Raw materials $ 331.8 $ 337.3
Work-in-process989.5 1,000.6
Finished goods48.2 58.1
Product inventory1,369.5 1,396
Capitalized pre-production26.3 26.3
Total inventory, net1,395.8 1,422.3
Inventory Valuation Reserves56.7 56.8
Costs Incurred in Anticipation of Contracts365 $ 351.2
Excess Capacity Costs- B737MAX and A320 Production Schedules67.6
Abnormal Costs- COVID19 production suspension $ 2.1

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in MillionsApr. 01, 2021Dec. 31, 2020
Property, plant and equipment, net
Land $ 30.9 $ 30.8
Buildings (including improvements)1,196.5 1,166.7
Machinery and equipment2,128 2,120.5
Tooling1,042.2 1,036.1
Capitalized software282.6 282.5
Construction-in-progress204.9 220
Total4,885.1 4,856.6
Less: accumulated depreciation(2,428.1)(2,352.8)
Property, plant and equipment, net $ 2,457 $ 2,503.8

Property, Plant and Equipment_3

Property, Plant and Equipment (Details Textual) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Property Plant And Equipment Textuals [Abstract]
Capitalized interest related to construction-in-progress $ 1.4 $ 1.2
Repair and maintenance costs34.4 30.5
Depreciation expense related to capitalized software $ 4.1 $ 4.3

Leases (Details)

Leases (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020Dec. 31, 2020
Lessee Disclosure [Abstract]
Operating Lease, Weighted Average Remaining Lease Term42 years 9 months 18 days42 years 3 months 18 days
Finance Lease, Weighted Average Remaining Lease Term5 years 2 months 12 days5 years 6 months
Assets and Liabilities, Lessee [Abstract]
Operating Lease, Liability, Current $ 5.5 $ 5.5
Operating Lease, Liability, Noncurrent66.6 66.6
Operating Lease, Liability72.1
finance lease, Right-of-Use Asset, gross214.2 214.2
Finance Lease, Right-of-Use Asset, Accumulated Amortization(51.1)(45.1)
Finance Lease, Right-of-Use Asset, after Accumulated Amortization163.1 $ 169.1
Finance Lease, Liability148
Lessee, Finance Lease, Lease Not yet Commenced, Description $ 106.9
Operating Lease, Weighted Average Discount Rate, Percent5.50%5.50%
Finance Lease, Weighted Average Discount Rate, Percent4.30%4.30%
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, to be Paid, Remainder of Fiscal Year $ 30.8
Finance Lease, Liability, to be Paid, Year Two37.2
Finance Lease, Liability, to be Paid, Year Three32.2
Finance Lease, Liability, to be Paid, Year Four25.4
Finance Lease, Liability, to be Paid, Year Five15.6
Finance Lease, Liability, to be Paid, after Year Five24.7
Finance Lease, Liability, Payment, Due165.9
Lease Imputed Interest Due- Financing(17.9)
Cash Flow, Operating Activities, Lessee [Abstract]
Operating lease cost2.4 $ 2.2
Finance Lease, Interest Payment on Liability1.6 1.6
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability1 0.2
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year6.6
Lessee, Operating Lease, Liability, to be Paid, Year Two8.8
Lessee, Operating Lease, Liability, to be Paid, Year Three7.9
Lessee, Operating Lease, Liability, to be Paid, Year Four7.4
Lessee, Operating Lease, Liability, to be Paid, Year Five6.8
Lessee, Operating Lease, Liability, to be Paid, after Year Five170
Lessee, Operating Lease, Liability, to be Paid207.5
Lease Imputed Interest Due- Operating(135.4)
Lease, Cost [Abstract]
Operating Lease, Cost2.5 2.2
Finance Lease, Right-of-Use Asset, Amortization6 5.8
Finance Lease, Interest Expense1.6 1.6
Lease, Cost10.1 9.6
Cash Flow, Financing Activities, Lessee [Abstract]
Finance Lease, Principal Payments $ 8.9 $ 6.7

Other Assets (Details)

Other Assets (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Dec. 31, 2020Apr. 02, 2020Dec. 31, 2019
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill) $ 218.1 $ 222.9
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year9.7
Finite-Lived Intangible Asset, Expected Amortization, Year Two13
Finite-Lived Intangible Asset, Expected Amortization, Year Three13
Finite-Lived Intangible Asset, Expected Amortization, Year Four13
Finite-Lived Intangible Asset, Expected Amortization, Year Five13
Finite-Lived Intangible Assets, Amortization Expense, Year Six $ 13
Finite-Lived Intangible Assets, Remaining Amortization Period16 years 2 months 12 days
Intangible assets
Deferred financing costs, net $ 0.4 0.4
Goodwill583.9 565.3
Equity in net assets of affiliates2.7 3.1
Customer Supply Agreement10.7 11.4
Restricted Cash, Noncurrent19.5 19.5 $ 16.5 $ 16.4
Other56 49.2
Total other long term assets89.3 83.6
Prepaid Expense, Current26.3 16.3
Income Taxes Receivable, Current312.4 315.3
Other Assets, Miscellaneous, Current5.8 4.7
Intangible Assets, Net (Excluding Goodwill)207 215.2
Other Assets, Current344.5 336.3
Patents [Member]
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)2 2
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year0.1
Finite-Lived Intangible Asset, Expected Amortization, Year Two0.1
Finite-Lived Intangible Asset, Expected Amortization, Year Three0.1
Finite-Lived Intangible Asset, Expected Amortization, Year Four0.1
Finite-Lived Intangible Asset, Expected Amortization, Year Five0.1
Finite-Lived Intangible Assets, Amortization Expense, Year Six $ 0.1
Finite-Lived Intangible Assets, Remaining Amortization Period8 years 3 months 18 days
Intangible assets
Less: Accumulated amortization $ (2)(2)
Favorable Leasehold [Member]
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)2.8 2.8
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year4.6
Finite-Lived Intangible Asset, Expected Amortization, Year Two6.1
Finite-Lived Intangible Asset, Expected Amortization, Year Three6.1
Finite-Lived Intangible Asset, Expected Amortization, Year Four6.1
Finite-Lived Intangible Asset, Expected Amortization, Year Five6.1
Finite-Lived Intangible Assets, Amortization Expense, Year Six $ 6.1
Finite-Lived Intangible Assets, Remaining Amortization Period14 years 3 months 18 days
Intangible assets
Less: Accumulated amortization $ (1.8)(1.8)
Debt issuance costs [Member]
Intangible assets
Deferred financing costs0.9 0.9
Less: Accumulated amortization-deferred financing costs(0.5)(0.5)
Developed Technology [Member]
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)92 94
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year5
Finite-Lived Intangible Asset, Expected Amortization, Year Two6.8
Finite-Lived Intangible Asset, Expected Amortization, Year Three6.8
Finite-Lived Intangible Asset, Expected Amortization, Year Four6.8
Finite-Lived Intangible Asset, Expected Amortization, Year Five6.8
Finite-Lived Intangible Assets, Amortization Expense, Year Six $ 6.8
Finite-Lived Intangible Assets, Remaining Amortization Period17 years 7 months 6 days
Intangible assets
Less: Accumulated amortization $ (4.2)(2.6)
Customer Relationships
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)121.1 124.1
Intangible assets
Less: Accumulated amortization(3.1)(1.3)
Other Intangible Assets
Other Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill) $ 0.2 $ 0

Other Assets (Details Textuals)

Other Assets (Details Textuals) - USD ($) $ in MillionsApr. 01, 2021Dec. 31, 2020
Goodwill [Line Items]
Goodwill $ 583.9 $ 565.3
Wing Systems [Member]
Goodwill [Line Items]
Goodwill2.6 2.5
Fuselage Systems [Member]
Goodwill [Line Items]
Goodwill42.9 42.9
Propulsion Systems [Member]
Goodwill [Line Items]
Goodwill33.1 33.1
Bombardier Acquisition
Goodwill [Line Items]
Goodwill $ 505.3 $ 486.8

Advance Payments and Deferred_2

Advance Payments and Deferred Revenue/Credits (Details) - USD ($) $ in MillionsApr. 01, 2021Dec. 31, 2020
advance payments [Line Items]
Customer advances- B787 program $ 212
Customer advances- B737 program130.5
Customer advances- Irkut program0.5
Total Payment [Member]
advance payments [Line Items]
Customer advances- B737 program $ 123
Total Payment [Member]
advance payments [Line Items]
Customer advances- B737 program225
Production Stabilization [Member]
advance payments [Line Items]
Customer advances- B737 program70
To be repaid in 2021 [Member]
advance payments [Line Items]
Customer advances- B737 program10
Prepayment of shipset deliveries [Member]
advance payments [Line Items]
Customer advances- B737 program $ 68.5 $ 155

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in MillionsApr. 01, 2021Dec. 31, 2020
Carrying amount and estimated fair value of long term debt
Carrying Amount $ 3,360.4 $ 3,658.9
Fair Value3,486.8 3,789.7
Secured Debt Term B [Member]
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent385.3 385.7
Carrying amount and estimated fair value of long term debt
Carrying Amount389.2 389.6
Fair Value393.6 395
Senior Unsecured Notes Due 2023 [Domain]
Carrying amount and estimated fair value of long term debt
Carrying Amount298.9 298.8
Fair Value296.4 293.8
Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent298.2 298.1
Carrying amount and estimated fair value of long term debt
Carrying Amount298.2 298.1
Fair Value310 313.9
Senior Unsecured Notes Due 2021 [Domain]
Carrying amount and estimated fair value of long term debt
Carrying Amount0 299.7
Fair Value0 297.5
Senior Secured Second Lien Notes Due 2025
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent1,185.1 1,184.2
Carrying amount and estimated fair value of long term debt
Carrying Amount1,185.1 1,184.2
Fair Value1,280.4 1,279.1
Senior Unsecured Notes Due 2028 [Member]
Carrying amount and estimated fair value of long term debt
Carrying Amount694.8 694.6
Fair Value683.5 689.2
Senior Secured Notes Due 2025
Debt Instrument [Line Items]
Secured Long-term Debt, Noncurrent494.2 493.9
Carrying amount and estimated fair value of long term debt
Carrying Amount494.2 493.9
Fair Value $ 522.9 $ 521.2

Derivative and Hedging Activi_2

Derivative and Hedging Activities (Details 1) $ in Millions3 Months Ended
Apr. 01, 2021USD ($)
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) $ 0

Derivative and Hedging Activi_3

Derivative and Hedging Activities (Details Textual) $ in Millions3 Months Ended
Apr. 01, 2021USD ($)
Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net $ 0.4
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring0.7
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)0
Foreign Exchange Forward
Derivatives Fair Value [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net1.2
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) $ 1.2
Maximum Length of Time Hedged in Cash Flow Hedge7 months

Debt (Details)

Debt (Details) - USD ($) $ in MillionsApr. 01, 2021Dec. 31, 2020
Long Term Debt And Capital Lease Obligations Current And Non Current [Abstract]
Capital Lease Obligations, Current $ 35 $ 35.3
Capital Lease Obligations, Noncurrent113 121.5
Other Long-term Debt, Current1.3 1.8
Other Long-term Debt, Noncurrent55.7 56.1
Long-term Debt and Lease Obligation, Current40.2 340.7
Long-term Debt and Lease Obligation3,525.2 3,532.9
Total Debt [Member]
Long Term Debt And Capital Lease Obligations Current And Non Current [Abstract]
Long-term Debt and Lease Obligation, Current40.2 340.7
Long-term Debt and Lease Obligation $ 3,525.2 $ 3,532.9

Debt (Details Textual)

Debt (Details Textual) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020Dec. 31, 2020
Debt Instrument [Line Items]
Proceeds from (Payments for) Other Financing Activities $ (0.1) $ 0
Repayments of Lines of Credit300 $ 0
Long-term Debt3,360.4 $ 3,658.9
Capital Lease Obligations, Current35 35.3
Capital Lease Obligations, Noncurrent113 121.5
Other Long-term Debt, Current1.3 1.8
Other Long-term Debt, Noncurrent $ 55.7 56.1
Senior Unsecured Notes Due 2023 [Domain]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage3.95%
Long-term Debt $ 298.9 298.8
Long-term Debt, Current Maturities0 0
Unsecured Long-term Debt, Noncurrent $ 298.9 298.8
Senior Unsecured Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage3.85%
Long-term Debt $ 298.2 298.1
Long-term Debt, Current Maturities0 0
Secured Long-term Debt, Noncurrent298.2 298.1
Senior Unsecured Notes Due 2021 [Domain]
Debt Instrument [Line Items]
Long-term Debt0 299.7
Long-term Debt, Current Maturities0 299.7
Unsecured Long-term Debt, Noncurrent $ 0 0
Senior Secured Second Lien Notes Due 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage7.50%
Long-term Debt $ 1,185.1 1,184.2
Long-term Debt, Current Maturities0 0
Secured Long-term Debt, Noncurrent $ 1,185.1 1,184.2
Senior Unsecured Notes Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage4.60%
Long-term Debt $ 694.8 694.6
Long-term Debt, Current Maturities0 0
Unsecured Long-term Debt, Noncurrent694.8 694.6
Secured Debt Term B [Member]
Debt Instrument [Line Items]
Long-term Debt389.2 389.6
Long-term Debt, Current Maturities3.9 3.9
Secured Long-term Debt, Noncurrent385.3 385.7
Senior Secured Notes Due 2025
Debt Instrument [Line Items]
Long-term Debt494.2 493.9
Long-term Debt, Current Maturities0 0
Secured Long-term Debt, Noncurrent $ 494.2 $ 493.9

Pension and Other Post-Retire_3

Pension and Other Post-Retirement Benefits Pension and Other Post-Retirement Benefits (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Year $ 10.4
Expected UK Pension Plan Contribution For Year1.9
Expected UK-Belfast Pension Plan Contribution For Year181.8
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost0.2 $ 0.3
Defined Benefit Plan, Interest Cost0.1 0.2
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)(0.2)(0.2)
Defined Benefit Plan, Amortization of Gain (Loss)(0.4)(0.5)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment0 (0.3)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change0 (11.8)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)(0.3)11.3
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost10.8 0.2
Defined Benefit Plan, Interest Cost13.7 8
Defined Benefit Plan, Expected Return (Loss) on Plan Assets(39.4)(17.3)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment0 33
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Other Change0 (24.7)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ (14.9) $ 48.6

Stock Compensation (Details)

Stock Compensation (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
LTIA AND Prior Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company recognized total stock compensation expense, net of forfeitures $ 6.6 $ 9.8
Class A [Member] | Long Term Incentive Plan RSU [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted346,896
Class A [Member] | Market Based LTIA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Of Shares Granted $ 9.8
Class A [Member] | Service Based LTIA [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted30,024
Class A [Member] | Performance Based LTIP RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted161,954
Class A [Member] | Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair Value Of Shares Granted $ 16.1

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent1.00%35.10%
Domestic Tax Authority
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Net $ 190.5
Valuation Allowance [Line Items]
Deferred Income Tax Liabilities, Net0.2
Deferred Tax Assets, Net190.5
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount40.2
Foreign Tax Authority
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Net187.2
Valuation Allowance [Line Items]
Deferred Income Tax Liabilities, Net9.8
Deferred Tax Assets, Net187.2
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 6.2

Equity (Details)

Equity (Details) - USD ($) $ / shares in Units, $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 925
Common Stock, Dividends, Per Share, Declared $ 0.01 $ 0.01
Basic EPS
Income available to common shareholders $ (171.6) $ (162.9)
Income available to common shareholders, shares104,100,000 103,700,000
Income available to common shareholders, per share amount $ (1.65) $ (1.57)
Income allocated to participating securities $ 0 $ (0.1)
Income allocated to participating securities, shares0 0
Net loss $ (171.6) $ (163)
Diluted potential common shares 0
Diluted EPS
Net loss $ (171.6) $ (163)
Shares104,100,000 103,700,000
Diluted (in dollars per share) $ (1.65) $ (1.57)
Equity Textuals [Abstract]
Noncontrolling interest $ 0.5 $ 0.5
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax(150)(154.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax $ 0.6 $ 1
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount1,300,000 700,000
Earnings Per Share, Potentially Dilutive Securities0.20.3
Pension [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (116.5)(112)
Accumulated Interest Rate Swaps [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax0 (0.9)
SERP and Retiree medical [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax14 14.5
Foreign currency impact on long term intercompany loan [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax(11.2)(11.8)
Currency translation adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax(37.5)(43.9)
Accumulated Foreign Exchange Forward [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 1.2 $ 0

Commitments, Contingencies an_3

Commitments, Contingencies and Guarantees (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Dec. 31, 2020Apr. 02, 2020Dec. 31, 2019
Commitments Contingencies And Guarantees [Abstract]
Restricted Cash, Noncurrent $ 19.5 $ 19.5 $ 16.5 $ 16.4
Service warranty roll forward
Product Warranty And Extraordinary Rework76.9
Charges to costs and expenses0.3
Product Warranty Accrual, Payments(1)
Product Warranty And Extraordinary Rework75.6
Product Warranty Extraordinary Rework Accrual Currency Translation Increase Decrease0
Commitments Contingencies And Guarantees Textuals [Abstract]
Outstanding amount of guarantees19.6 $ 19.6
Product Liability Accrual, Component Amount8.1
Product Liability Contingency, Loss Exposure in Excess of Accrual, Best Estimate $ 12.1

Other Income (Expense), Net (De

Other Income (Expense), Net (Details) - USD ($) $ in Millions3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Other Income (Loss) [Line Items]
Kansas Development Finance Authority bond $ 0.9 $ 1.1
Interest Income, Other0.6 6.9
Foreign currency (losses) gains (1)(8.9)5.4
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments(0.8)0.1
Gain (Loss) on Sale of Accounts Receivable(1.6)(3.1)
Pension Income (Expense) without Service Cost26.1 (59.6)
Accounts Receivable, Credit Loss Expense (Reversal)(1)0
Amortization of Intangible Assets(2.3)0
Other Cost and Expense, Operating(0.2)(0.2)
VRP pension expense15.4 69.2
Total $ 12.8 $ (49)

Segment Information (Details)

Segment Information (Details)3 Months Ended
Apr. 01, 2021USD ($)segmentApr. 02, 2020USD ($)
Segment Reporting Information [Line Items]
Restructuring Charges $ 2,100,000 $ 42,600,000
Excess Capacity Costs- B737MAX and A320 Production Schedules67,600,000
Abnormal Costs- COVID19 production suspension2,100,000
Cost of Goods and Services Sold958,800,000 1,112,500,000
Segment Revenues
Segment Revenues900,800,000 1,077,300,000
Segment Operating Income
Business Segment Operating Income(60,800,000)(76,300,000)
Segment Information Unallocated Corporate Selling General And Administrative(57,600,000)(77,400,000)
Segment Information Unallocated Research And Development(8,200,000)(12,300,000)
Segment Information Unallocated Cost Of Sales700,000 (1,500,000)
Operating loss $ (125,900,000)(167,500,000)
Segment Reporting Information, Additional Information [Abstract]
Number Of Principal Segments | segment3
Percentage Of Net Revenue Derived From Two Largest Customers78.00%
Fuselage Systems [Member]
Segment Reporting Information [Line Items]
Restructuring Charges $ 1,800,000 30,100,000
Excess Capacity Costs- B737MAX and A320 Production Schedules42,600,000 51,200,000
Abnormal Costs- COVID19 production suspension700,000 15,300,000
Segment Revenues
Segment Revenues437,100,000 551,500,000
Segment Operating Income
Business Segment Operating Income(59,800,000)(86,400,000)
Propulsion Systems [Member]
Segment Reporting Information [Line Items]
Restructuring Charges(200,000)8,800,000
Excess Capacity Costs- B737MAX and A320 Production Schedules7,200,000 15,800,000
Abnormal Costs- COVID19 production suspension100,000 6,200,000
Segment Revenues
Segment Revenues226,500,000 225,200,000
Segment Operating Income
Business Segment Operating Income16,700,000 (5,300,000)
Wing Systems [Member]
Segment Reporting Information [Line Items]
Restructuring Charges500,000 3,700,000
Excess Capacity Costs- B737MAX and A320 Production Schedules17,800,000 6,400,000
Abnormal Costs- COVID19 production suspension1,300,000 3,900,000
Segment Revenues
Segment Revenues223,600,000 291,400,000
Segment Operating Income
Business Segment Operating Income(18,900,000)13,600,000
Other Systems [Member]
Segment Revenues
Segment Revenues13,600,000 9,200,000
Segment Operating Income
Business Segment Operating Income $ 1,200,000 $ 1,800,000

Restructuring Charges (Details)

Restructuring Charges (Details) - USD ($)3 Months Ended
Apr. 01, 2021Apr. 02, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring Charges $ 2,100,000 $ 42,600,000
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges31,500,000
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs11,100,000
Fuselage Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges1,800,000 30,100,000
Propulsion Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges(200,000)8,800,000
Wing Systems [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges $ 500,000 $ 3,700,000

Acquisition (Details)

Acquisition (Details) - USD ($)3 Months Ended
Apr. 01, 2021Apr. 02, 2020Dec. 31, 2020
Business Acquisition [Line Items]
Revenues $ 900,800,000 $ 1,077,300,000
Net Income (Loss) Attributable to Parent(171,600,000) $ (163,000,000)
Goodwill $ 583,900,000 $ 565,300,000
Earnings Per Share, Diluted $ (1.65) $ (1.57)
Restructuring Charges $ 2,100,000 $ 42,600,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 24,800,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasonsafter the Company further analyzes and assesses a number of the factors used in establishing the fair values of assets acquired and liabilities assumed as of the Bombardier Acquisition date including, but not limited to, contractual and operational factors underlying the customer-related intangible assets and property, plant and equipment; details surrounding tax matters; and assumptions underlying certain existing or potential reserves, such as those for product warranties and environmental matters.
Business Combination, Provisional Information, Initial Accounting Incomplete, Nature of AdjustmentsBased on additional information obtained during the three month measurement period ended April 1, 2021, the Company
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles $ 5,000,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities10,900,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets2,200,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory400,000
Retained Earnings [Member]
Business Acquisition [Line Items]
Net Income (Loss) Attributable to Parent(171,600,000)(163,000,000)
Asco [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs100,000 11,000,000
Bombardier Acquisition
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)(171,600,000)(152,300,000)
Business Acquisition, Pro Forma Revenue900,800,000 1,226,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents4,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables $ 91,900,000
Business Acquisition, Effective Date of AcquisitionOct. 30,
2020
Business Combination, Consideration Transferred $ 895,000,000
Business Combination, Reason for Business CombinationThe acquisition is in line with the Company’s growth strategy of increasing Airbus content, developing low-cost country footprint, and growing the Company’s aftermarket business.
Business Acquisition, Description of Acquired EntityThe Bombardier Acquired Businesses are global leaders in aerostructures and fabrication, delivering composite and metallic wing components, nacelles, fuselages and tail assemblies, along with high-value mechanical assemblies made out of aluminum, titanium and steel.
Business Acquisition, Transaction Costs $ 1,300,000 $ 1,000,000
Goodwill505,300,000 486,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory251,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets11,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment373,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles183,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets11,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets1,460,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable90,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other31,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other313,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities1,185,400,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net $ 275,000,000
Business Acquisition, Pro Forma Earnings Per Share, Diluted $ (1.65) $ (1.47)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets, Right of Use $ 27,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accrued payroll and employee benefits113,800,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, forward loss provisions, short term23,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Forward Loss Provisions269,200,000
Business Combination, Recognized Identifiable Asset Acquired and Liability Assumed, Lease Obligation27,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Retirement benefits316,300,000
Business Combination, Consideration Transferred, Liabilities Incurred316,000,000
Business Combination, Consideration Transferred, Other304,000,000
Payments to Acquire Businesses, Gross275,000,000
Technology-Based Intangible Assets [Member] | Bombardier Acquisition
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 62,000,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life15 years
Customer Relationships | Bombardier Acquisition
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles $ 121,100,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life18 years
Fuselage Systems [Member]
Business Acquisition [Line Items]
Revenues $ 437,100,000 $ 551,500,000
Goodwill42,900,000 42,900,000
Restructuring Charges1,800,000 30,100,000
Propulsion Systems [Member]
Business Acquisition [Line Items]
Revenues226,500,000 225,200,000
Goodwill33,100,000 33,100,000
Restructuring Charges(200,000)8,800,000
Wing Systems [Member]
Business Acquisition [Line Items]
Revenues223,600,000 291,400,000
Goodwill2,600,000 $ 2,500,000
Restructuring Charges $ 500,000 $ 3,700,000

Uncategorized Items - spr-20210

LabelElementValue
Accounting Standards Update and Change in Accounting Principle [Text Block]us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlockIn December 2019, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2019-12, Simplifying the Accounting for Income Taxes ("ASU 2019-12”) which modifies FASB Accounting Standards Codification (“ASC”) 740 to simplify the accounting for income taxes. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020. The adoption of ASU 2019-12 did not have a material impact on our financial position or results of operations. In October 2020, the FASB issued ASU 2020-09, (“ASU 2020-09”), which revises certain SEC paragraphs of the ASC to reflect, as appropriate, the amended financial statement disclosure requirements in SEC Release 33-10762, Financial Disclosures about Guarantors and Issuers of Guaranteed Securities and Affiliates Whose Securities Collateralize a Registrant’s Securities . There is no impact to our financial position or results of operations due to the adoption of ASU 2020-09.