Condensed Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net cash provided by (used in) operating activities	$ 3,932	$ 2,189	$ 2,848
Investing activities
Net (investments) return in the utility money pool	0	(57)	(18)
Other, net	(122)	(140)	(164)
Net cash provided by (used in) investing activities	(4,653)	(4,287)	(4,740)
Financing activities
Proceeds from (repayment of) short-term borrowings, net	(192)	421	(11)
Proceeds from Issuance of Long-term Debt	2,164	2,710	2,940
Repayment of long-term debt	(601)	(417)	(1,001)
Proceeds from Issuance of Common Stock	322	366	727
Payments of Dividends	(1,012)	(935)	(856)
Proceeds from (Payments for) Other Financing Activities	(15)	(10)	(26)
Net cash provided by (used in) financing activities	666	2,135	1,773
Net change in cash and cash equivalents	(55)	37	(119)
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	166	129	248
Cash and Cash Equivalents, at Carrying Value, Ending Balance	111	166	129
Xcel Energy Inc.
Operating activities
Net cash provided by (used in) operating activities	1,340	1,147	2,377
Investing activities
Capital contributions to subsidiaries	921	1,661	2,553
Other, net	0	0	(1)
Net cash provided by (used in) investing activities	(921)	(1,604)	(2,572)
Financing activities
Proceeds from (repayment of) short-term borrowings, net	(407)	638	(500)
Proceeds from Issuance of Long-term Debt	694	791	1,089
Repayment of long-term debt	0	400	300
Proceeds from Issuance of Common Stock	322	366	727
Repurchases of common stock	0	0	4
Payments of Dividends	1,012	935	856
Proceeds from (Payments for) Other Financing Activities	(16)	(16)	(17)
Net cash provided by (used in) financing activities	(419)	444	139
Net change in cash and cash equivalents	0	(13)	(56)
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	1	14	70
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 1	$ 1	$ 14