Leases (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Maximum Length - Short-Term Leases		12 months
Operating Lease, Weighted Average Discount Rate, Percent		4.10%
Operating Lease ROU Assets
Gross operating lease ROU assets		$ 1,913,000,000	$ 1,881,000,000
Accumulated amortization		(709,000,000)	(590,000,000)
Net operating lease ROU assets		1,204,000,000	1,291,000,000
Finance Lease ROU Assets
Gross finance lease ROU assets		181,000,000	222,000,000
Accumulated amortization		$ (64,000,000)	$ (97,000,000)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]		Other assets	Other assets
Net finance lease ROU assets		$ 117,000,000	$ 125,000,000
Components of Lease Expense
Operating Lease, Cost	[1]	280,000,000	287,000,000	$ 264,000,000
Finance Lease, Right-of-Use Asset, Amortization		4,000,000	7,000,000	7,000,000
Finance Lease, Interest Expense		16,000,000	17,000,000	18,000,000
Finance Lease, Cost		20,000,000	24,000,000	25,000,000
Short-term Lease, Cost		6,000,000	6,000,000	6,000,000
Operating Lease Commitments
2023		264,000,000
2024		266,000,000
2025		240,000,000
2026		179,000,000
2027		108,000,000
Thereafter		400,000,000
Total minimum obligation		1,457,000,000
Interest component of obligation		(202,000,000)
Regulatory liabilities		1,255,000,000
Less current portion		$ (217,000,000)	$ (205,000,000)
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other liabilities	Other liabilities
Noncurrent operating and finance lease liabilities		$ 1,038,000,000	$ 1,146,000,000
Operating Lease, Weighted Average Remaining Lease Term		7.9
Finance Lease, Liability, Payment, Due [Abstract]
2023	[2]	10,000,000
2024	[2]	10,000,000
2025	[2]	10,000,000
2026	[2]	9,000,000
2027	[2]	8,000,000
Thereafter	[2]	181,000,000
Total minimum obligation	[2]	228,000,000
Interest component of obligation	[2]	(162,000,000)
Present value of minimum obligation	[2]	66,000,000
Finance Lease, Liability, Current	[2]	(2,000,000)
Finance Lease, Liability, Noncurrent	[2]	64,000,000
Finance Lease, Weighted Average Remaining Lease Term	[2]	37.8
Purchased Power Agreements
Operating Lease ROU Assets
Gross operating lease ROU assets		1,669,000,000	1,656,000,000
Components of Lease Expense
Operating Lease, Cost		241,000,000	251,000,000	238,000,000
Operating Lease Commitments
2023	[3],[4]	231,000,000
2024	[3],[4]	238,000,000
2025	[3],[4]	217,000,000
2026	[3],[4]	161,000,000
2027	[3],[4]	90,000,000
Thereafter	[3],[4]	326,000,000
Total minimum obligation	[3],[4]	1,263,000,000
Interest component of obligation	[3],[4]	(170,000,000)
Regulatory liabilities	[3],[4]	1,093,000,000
Other Operating Lease [Domain]
Operating Lease ROU Assets
Gross operating lease ROU assets		244,000,000	225,000,000
Components of Lease Expense
Operating Lease, Cost	[5]	39,000,000	36,000,000	$ 26,000,000
Operating Lease Commitments
2023		33,000,000
2024		28,000,000
2025		23,000,000
2026		18,000,000
2027		18,000,000
Thereafter		74,000,000
Total minimum obligation		194,000,000
Interest component of obligation		(32,000,000)
Regulatory liabilities		162,000,000
Gas Storage Facilities [Member]
Finance Lease ROU Assets
Gross finance lease ROU assets		160,000,000	201,000,000
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 2033.

[5] Includes short-term lease expense of $6 million for 2022 and $5 million for 2021 and 2020.