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Schedule II, Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts (Tables) | 12 Months Ended
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Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] | Xcel Energy Inc. and Subsidiaries Valuation and Qualifying Accounts Years Ended Dec. 31
|  | Allowance for bad debts |  | NOL and tax credit valuation allowances
(Millions of Dollars) |  | 2024 |  | 2023 |  | 2022 |  | 2024 |  | 2023 |  | 2022 |
Balance at Jan. 1 |  | $ | 128 |  |  | $ | 122 |  |  | $ | 106 |  |  | $ | 70 |  |  | $ | 62 |  |  | $ | 64 |  |
Additions charged to costs and expenses |  | 64 |  |  | 79 |  |  | 73 |  |  | 45 |  |  | 26 |  |  | 6 |  |
Additions charged to other accounts |  | 16 |  | (a) | 13 |  | (a) | 26 |  | (a) | — |  |  | — |  |  | — |  |
Deductions from reserves |  | (97) |  | (b) | (86) |  | (b) | (83) |  | (b) | (42) |  | (c) | (18) |  | (c) | (8) |  | (c)
Balance at Dec. 31 |  | $ | 111 |  |  | $ | 128 |  |  | $ | 122 |  |  | $ | 73 |  |  | $ | 70 |  |  | $ | 62 |  |
(a)Recovery of amounts previously written-off. (b)Deductions related primarily to bad debt write-offs. (c)Primarily reversals of valuation allowances on completed tax credit sales and reductions of valuation allowances for items forecasted to be used prior to expiration.

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