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v3.25.1

Borrowings and Other Financing Instruments Term Loan (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Short-term Debt [Line Items] |  |  |
Amount outstanding at period end | $ 719 |  | $ 695
Proceeds from issuance of common stock | 122 | $ 8 |
ATM Net Proceeds | 122 |  |
Letter of Credit |  |  |
Short-term Debt [Line Items] |  |  |
Amount outstanding at period end | $ 41 |  | $ 42
Series Due May 15, 2034 | Bonds [Member] | PSCo |  |  |
Short-term Debt [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.35% |  |
Debt Instrument, Face Amount | $ 400 |  |
Series Due March 21, 2028 | Bonds [Member] | XCEL ENERGY INC [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.75% |  |
Debt Instrument, Face Amount | $ 350 |  |
Series Due April 15, 2035 | Bonds [Member] | XCEL ENERGY INC [Member] |  |  |
Short-term Debt [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.60% |  |
Debt Instrument, Face Amount | $ 750 |  |
Series Due May 15, 2055 | Bonds [Member] | PSCo |  |  |
Short-term Debt [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.85% |  |
Debt Instrument, Face Amount | $ 600 |  |

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