Leases (Details) - USD ($)		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Maximum Length - Short-Term Leases		12 months
Operating Lease, Weighted Average Discount Rate, Percent		4.60%
Operating Lease ROU Assets
Gross operating lease ROU assets		$ 2,175,000,000	$ 2,147,000,000
Accumulated amortization		(1,115,000,000)	(930,000,000)
Net operating lease ROU assets		1,060,000,000	1,217,000,000
Finance Lease ROU Assets
Gross finance lease ROU assets		181,000,000	181,000,000
Accumulated amortization		$ (70,000,000)	$ (67,000,000)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Other assets	Other assets
Net finance lease ROU assets		$ 111,000,000	$ 114,000,000
Components of Lease Expense
Operating Lease, Cost	[1]	271,000,000	283,000,000	$ 280,000,000
Finance Lease, Right-of-Use Asset, Amortization		3,000,000	3,000,000	4,000,000
Finance Lease, Interest Expense		15,000,000	15,000,000	16,000,000
Finance Lease, Cost		18,000,000	18,000,000	20,000,000
Short-term Lease, Cost		4,000,000	$ 3,000,000	6,000,000
Operating Lease Commitments
2025		271,000,000
2026		243,000,000
2027		189,000,000
2028		134,000,000
2029		81,000,000
Thereafter		437,000,000
Total minimum obligation		1,355,000,000
Interest component of obligation		(261,000,000)
Regulatory liabilities		$ 1,094,000,000
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]		Other current liabilities	Other current liabilities
Less current portion		$ (227,000,000)	$ (226,000,000)
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other liabilities	Other liabilities
Noncurrent operating and finance lease liabilities		$ 867,000,000	$ 1,038,000,000
Operating Lease, Weighted Average Remaining Lease Term		8.7
Finance Lease, Liability, Payment, Due [Abstract]
2025	[2]	10,000,000
2026	[2]	9,000,000
2027	[2]	8,000,000
2028	[2]	8,000,000
2029	[2]	8,000,000
Thereafter	[2]	165,000,000
Total minimum obligation	[2]	208,000,000
Interest component of obligation	[2]	(146,000,000)
Present value of minimum obligation	[2]	62,000,000
Finance Lease, Liability, Current	[2]	(2,000,000)
Finance Lease, Liability, Noncurrent	[2]	60,000,000
Finance Lease, Weighted Average Remaining Lease Term	[2]	$ 35.8
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		$ 1,802,000,000	1,832,000,000
Components of Lease Expense
Operating Lease, Cost		228,000,000	241,000,000	241,000,000
Operating Lease Commitments
2025	[3],[4]	240,000,000
2026	[3],[4]	210,000,000
2027	[3],[4]	162,000,000
2028	[3],[4]	107,000,000
2029	[3],[4]	59,000,000
Thereafter	[3],[4]	199,000,000
Total minimum obligation	[3],[4]	977,000,000
Interest component of obligation	[3],[4]	(115,000,000)
Regulatory liabilities	[3],[4]	862,000,000
Other Operating Lease [Domain]
Operating Lease ROU Assets
Gross operating lease ROU assets		373,000,000	315,000,000
Components of Lease Expense
Operating Lease, Cost	[5]	43,000,000	42,000,000	$ 39,000,000
Operating Lease Commitments
2025		31,000,000
2026		33,000,000
2027		27,000,000
2028		27,000,000
2029		22,000,000
Thereafter		238,000,000
Total minimum obligation		378,000,000
Interest component of obligation		(146,000,000)
Regulatory liabilities		232,000,000
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 $4 million, $3 million, and $6 million for 2024, 2023 and 2022, respectively.