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Borrowings and Other Financing Instruments Letters of Credit (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023
Line of Credit Facility [Line Items] |  |  |
Amount outstanding at period end |  | $ 695 | $ 785
Xcel Energy Inc. |  |  |
Line of Credit Facility [Line Items] |  |  |
Amount outstanding at period end |  | $ 235 | $ 165
Letter of Credit |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Expiration Period |  | 1 year |
Revolving Credit Facility [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | [1] | $ 3,550 |
Revolving Credit Facility [Member] | Xcel Energy Inc. |  |  |
Line of Credit Facility [Line Items] |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | [1] | $ 1,500 |
[1] | These credit facilities mature in September 2027.

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