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Leases (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Lessee, Lease, Description [Line Items] |  |  |  |
Maximum Length - Short-Term Leases |  | 12 months |  |
Operating Lease, Weighted Average Discount Rate, Percent |  | 4.40% |  |
Operating Lease ROU Assets |  |  |  |
Gross operating lease ROU assets |  | $ 2,147,000,000 | $ 1,913,000,000 |
Accumulated amortization |  | (930,000,000) | (709,000,000) |
Net operating lease ROU assets |  | 1,217,000,000 | 1,204,000,000 |
Finance Lease ROU Assets |  |  |  |
Gross finance lease ROU assets |  | 181,000,000 | 181,000,000 |
Accumulated amortization |  | $ (67,000,000) | $ (64,000,000) |
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |  | Other assets | Other assets |
Net finance lease ROU assets |  | $ 114,000,000 | $ 117,000,000 |
Components of Lease Expense |  |  |  |
Operating Lease, Cost | [1] | 283,000,000 | 280,000,000 | $ 287,000,000
Finance Lease, Right-of-Use Asset, Amortization |  | 3,000,000 | 4,000,000 | 7,000,000
Finance Lease, Interest Expense |  | 15,000,000 | 16,000,000 | 17,000,000
Finance Lease, Cost |  | 18,000,000 | 20,000,000 | 24,000,000
Short-term Lease, Cost |  | 3,000,000 | $ 6,000,000 | 5,000,000
Operating Lease Commitments |  |  |  |
2024 |  | 277,000,000 |  |
2025 |  | 271,000,000 |  |
2026 |  | 238,000,000 |  |
2027 |  | 184,000,000 |  |
2028 |  | 129,000,000 |  |
Thereafter |  | 421,000,000 |  |
Total minimum obligation |  | 1,520,000,000 |  |
Interest component of obligation |  | (256,000,000) |  |
Regulatory liabilities |  | $ 1,264,000,000 |  |
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |  | Other current liabilities | Other current liabilities |
Less current portion |  | $ (226,000,000) | $ (217,000,000) |
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |  | Other liabilities | Other liabilities |
Noncurrent operating and finance lease liabilities |  | $ 1,038,000,000 | $ 1,038,000,000 |
Operating Lease, Weighted Average Remaining Lease Term |  | 8.2 |  |
Finance Lease, Liability, Payment, Due [Abstract] |  |  |  |
2024 | [2] | 10,000,000 |  |
2025 | [2] | 10,000,000 |  |
2026 | [2] | 9,000,000 |  |
2027 | [2] | 8,000,000 |  |
2028 | [2] | 8,000,000 |  |
Thereafter | [2] | 173,000,000 |  |
Total minimum obligation | [2] | 218,000,000 |  |
Interest component of obligation | [2] | (154,000,000) |  |
Present value of minimum obligation | [2] | 64,000,000 |  |
Finance Lease, Liability, Current | [2] | (2,000,000) |  |
Finance Lease, Liability, Noncurrent | [2] | 62,000,000 |  |
Finance Lease, Weighted Average Remaining Lease Term | [2] | $ 36.8 |  |
WYCO, Inc. [Member] |  |  |  |
Operating Lease ROU Assets |  |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |  |
Purchased Power Agreements |  |  |  |
Operating Lease ROU Assets |  |  |  |
Gross operating lease ROU assets |  | $ 1,832,000,000 | 1,669,000,000 |
Components of Lease Expense |  |  |  |
Operating Lease, Cost |  | 241,000,000 | 241,000,000 | 251,000,000
Operating Lease Commitments |  |  |  |
2024 | [3],[4] | 244,000,000 |  |
2025 | [3],[4] | 245,000,000 |  |
2026 | [3],[4] | 216,000,000 |  |
2027 | [3],[4] | 162,000,000 |  |
2028 | [3],[4] | 107,000,000 |  |
Thereafter | [3],[4] | 259,000,000 |  |
Total minimum obligation | [3],[4] | 1,233,000,000 |  |
Interest component of obligation | [3],[4] | (157,000,000) |  |
Regulatory liabilities | [3],[4] | 1,076,000,000 |  |
Other Operating Lease [Domain] |  |  |  |
Operating Lease ROU Assets |  |  |  |
Gross operating lease ROU assets |  | 315,000,000 | 244,000,000 |
Components of Lease Expense |  |  |  |
Operating Lease, Cost | [5] | 42,000,000 | 39,000,000 | $ 36,000,000
Operating Lease Commitments |  |  |  |
2024 |  | 33,000,000 |  |
2025 |  | 26,000,000 |  |
2026 |  | 22,000,000 |  |
2027 |  | 22,000,000 |  |
2028 |  | 22,000,000 |  |
Thereafter |  | 162,000,000 |  |
Total minimum obligation |  | 287,000,000 |  |
Interest component of obligation |  | (99,000,000) |  |
Regulatory liabilities |  | 188,000,000 |  |
Gas Storage Facilities [Member] |  |  |  |
Finance Lease ROU Assets |  |  |  |
Gross finance lease ROU assets |  | 160,000,000 | 160,000,000 |
Pipelines [Member] |  |  |  |
Finance Lease ROU Assets |  |  |  |
Gross finance lease ROU assets |  | $ 21,000,000 | $ 21,000,000 |
[1] | 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.
[2] | Excludes certain amounts related to Xcel Energy’s 50% ownership interest in WYCO.
[3] | Amounts do not include PPAs accounted for as executory contracts and/or contingent payments, such as energy payments on renewable PPAs.
[4] | PPA operating leases contractually expire at various dates through 2039.
[5] | Includes short-term lease expense of $3 million, $6 million, and $5 million for 2023, 2022 and 2021, respectively.

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