Condensed Statement of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Other, net	$ (150)	$ (157)	$ (122)
Net cash provided by (used in) operating activities	4,641	5,327	3,932
Investing activities
Debt Securities, Held-to-Maturity, Purchase	(105)	0	0
Net (investments) return in the utility money pool	(21)	(21)	0
Net cash provided by (used in) investing activities	(7,428)	(5,926)	(4,653)
Financing activities
Proceeds from (repayment of) short-term borrowings, net	(90)	(28)	(192)
Proceeds from Issuance of Long-term Debt	3,647	2,630	2,164
Repayment of long-term debt	(656)	(1,151)	(601)
Proceeds from Issuance of Common Stock	1,117	270	322
Payments of Dividends	(1,175)	(1,092)	(1,012)
Proceeds from (Payments for) Other Financing Activities	(6)	(12)	(15)
Net cash provided by (used in) financing activities	2,837	617	666
Net change in cash and cash equivalents	50	18	(55)
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	129	111	166
Cash and Cash Equivalents, at Carrying Value, Ending Balance	179	129	111
Xcel Energy Inc.
Operating activities
Net cash provided by (used in) operating activities	1,459	1,586	1,340
Investing activities
Capital contributions to subsidiaries	2,184	975	921
Net cash provided by (used in) investing activities	(2,268)	(954)	(921)
Financing activities
Proceeds from (repayment of) short-term borrowings, net	70	(66)	(407)
Proceeds from Issuance of Long-term Debt	795	792	694
Repayment of long-term debt	0	500	0
Proceeds from Issuance of Common Stock	1,117	270	322
Payments of Dividends	1,175	1,092	1,012
Proceeds from (Payments for) Other Financing Activities	(6)	(13)	(16)
Net cash provided by (used in) financing activities	801	(609)	(419)
Net change in cash and cash equivalents	(8)	23	0
Cash and Cash Equivalents, at Carrying Value, Beginning Balance	24	1	1
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 16	$ 24	$ 1