| Cover Page | Sep. 01, 2023 |
| Document Information [Line Items] | |
| Amendment Flag | false |
| Entity Registrant Name | XCEL ENERGY INC |
| Entity Central Index Key | 0000072903 |
| Entity Incorporation, State or Country Code | MN |
| Document Type | 8-K |
| Document Period End Date | Sep. 01, 2023 |
| Entity File Number | 001-3034 |
| Entity Tax Identification Number | 41-0448030 |
| 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 |
| Title of 12(b) Security | Common Stock, $2.50 par value per share |
| Trading Symbol | XEL |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Northern States Power Co. WISC | |
| Document Information [Line Items] | |
| Entity Registrant Name | NORTHERN STATES POWER CO /WI/ |
| Entity Central Index Key | 0000072909 |
| Entity Incorporation, State or Country Code | WI |
| Entity File Number | 001-03140 |
| Entity Tax Identification Number | 39-0508315 |
| Entity Address, Address Line One | 1414 West Hamilton Avenue |
| Entity Address, City or Town | Eau Claire |
| Entity Address, State or Province | WI |
| Entity Address, Postal Zip Code | 54701 |
| City Area Code | (715) |
| Local Phone Number | 839-2625 |
