Document and Entity Information
Document and Entity Information | May 09, 2022 |
Cover [Abstract] | |
Entity Registrant Name | NORTHERN STATES POWER CO |
Amendment Flag | false |
Entity Central Index Key | 0001123852 |
Document Type | 8-K |
Document Period End Date | May 9, 2022 |
Entity Incorporation State Country Code | MN |
Entity File Number | 001-31387 |
Entity Tax Identification Number | 41-1967505 |
Entity Address, Address Line One | 414 Nicollet Mall |
Entity Address, City or Town | Minneapolis |
Entity Address, State or Province | MN |
Entity Address, Postal Zip Code | 55401 |
City Area Code | 612 |
Local Phone Number | 330-5500 |
Written Communications | false |
Soliciting Material | false |
Pre Commencement Tender Offer | false |
Pre Commencement Issuer Tender Offer | false |
Entity Emerging Growth Company | false |