Borrowings and Other Financing Instruments Capital Stock (Details) - $ / shares	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Common Stock, Shares Authorized (in shares)	1,000,000,000	1,000,000,000
Common Stock, Par Value (in dollars per share)	$ 2.50	$ 2.50
Common Stock, Shares Outstanding (in shares)	574,365,598	554,941,703
Xcel Energy Inc.
Debt Instrument [Line Items]
Preferred Stock, Shares Authorized (in shares)	7,000,000
Preferred Stock, Par Value (in dollars per share)	$ 100
Preferred Stock, Shares Outstanding (in shares)	0	0
PSCo
Debt Instrument [Line Items]
Preferred Stock, Shares Authorized (in shares)	10,000,000
Preferred Stock, Par Value (in dollars per share)	$ 0.01
Preferred Stock, Shares Outstanding (in shares)	0	0
SPS
Debt Instrument [Line Items]
Preferred Stock, Shares Authorized (in shares)	10,000,000
Preferred Stock, Par Value (in dollars per share)	$ 1.00
Preferred Stock, Shares Outstanding (in shares)	0	0