Other Equity Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Instruments Other than Options Activity [Roll Forward]
Balance at January 1 (in shares)	695
Granted (in shares)	395	421	411
Forfeited (in shares)	(96)
Vested (in shares)	(319)	(392)	(442)
Dividend equivalents (in shares)	33
Balance at December 31 (in shares)	708	695
Equity Instruments Other than Options, Weighted Average Grant Date Fair Value [Abstract]
Balance at January 1, weighted average grant date fair value (in dollars per share)	$ 64.59
Granted, weighted average grant date fair value (in dollars per share)	68.43	$ 66.03	$ 62.92
Forfeited, weighted average grant date fair value (in dollars per share)	65.53
Vested, weighted average grant date fair value (in dollars per share)	63.03
Dividend equivalents, weighted average grant date fair value (in dollars per share)	65.40
Balance at December 31, weighted average grant date fair value (in dollars per share)	$ 67.35	$ 64.59
Equity Instruments Other than Options, Additional Disclosures [Abstract]
Total fair value of equity awards vested during the period	$ 22	$ 27	$ 29
Performance-based awards [Member]
Equity Instruments Other than Options, Additional Disclosures [Abstract]
Award Vesting Period (in years)	3 years
Service-based awards [Member]
Equity Instruments Other than Options Activity [Roll Forward]
Granted (in shares)	200
Xcel Energy Inc. 2015 Omnibus Incentive Plan [Member] | Service-based awards [Member]
Equity Instruments Other than Options Activity [Roll Forward]
Granted (in shares)	7,000
Equity Award Granted Between 2015 and 2018 | Performance-based awards [Member] | Minimum
Equity Instruments Other than Options, Additional Disclosures [Abstract]
Percentage payout for performance-based equity awards	0.00%
Equity Award Granted Between 2015 and 2018 | Performance-based awards [Member] | Maximum
Equity Instruments Other than Options, Additional Disclosures [Abstract]
Percentage payout for performance-based equity awards	200.00%