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Commitment and Contingencies (Tables) | 3 Months Ended
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Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract] |
Finance Lease, Liability, Fiscal Year Maturity | Commitments under operating and finance leases as of March 31, 2025:
(Millions of Dollars) |  | PPA Operating Leases |  | Other Operating Leases |  | Total Operating Leases |  | Finance Leases (a)
Total minimum obligation |  | $ | 1,014 |  |  | $ | 368 |  |  | $ | 1,382 |  |  | $ | 206 |
Interest component of obligation |  | (131) |  |  | (143) |  |  | (274) |  |  | (145) |
Present value of minimum obligation |  | $ | 883 |  |  | 225 |  |  | 1,108 |  |  | 61 |
Less current portion |  |  |  |  |  | (219) |  |  | (2) |
Noncurrent operating and finance lease liabilities |  |  |  |  |  | $ | 889 |  |  | $ | 59 |
(a)Excludes certain amounts related to Xcel Energy’s 50% ownership interest in WYCO.
Lease, Cost | Components of lease expense:
|  | Three Months Ended March 31
(Millions of Dollars) |  | 2025 |  | 2024
Operating leases |  |  |  |
PPA capacity payments |  | $ | 57 |  |  | $ | 58 |
Other operating leases (a) |  | 13 |  |  | 11 |
Total operating lease expense (b) |  | $ | 70 |  |  | $ | 69 |
Finance leases |  |  |  |
Amortization of ROU assets |  | $ | 1 |  |  | $ | 1 |
Interest expense on lease liability |  | 4 |  |  | 4 |
Total finance lease expense |  | $ | 5 |  |  | $ | 5 |
(a)Includes immaterial short-term lease expense for the three months ended March 31, 2025 and 2024. (b)PPA capacity payments are included in electric fuel and purchased power on the consolidated statements of income. Expense for other operating leases is included in O&M expense and electric fuel and purchased power.

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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