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Condensed Notes to the Financial Statements (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Money Pool [Abstract]      
Guarantor Obligations, Maximum Exposure, Undiscounted $ 93 $ 75  
Schedule of Guarantor Obligations
Guarantees and bond indemnities issued and outstanding as of Dec. 31, 2024:
(Millions of Dollars)GuarantorGuarantee
Amount		Current
Exposure		Triggering
Event
Guarantees of Capital Services purchase contracts for wind and solar generating equipmentXcel Energy Inc. 951 
(a)
(b)
Guarantees of Xcel Energy Services Inc. performance and payments on operating lease agreementsXcel Energy Inc.29 29 
(b)
Guarantee performance and payment of surety bonds for Xcel Energy Inc.’s utility subsidiaries (c)
Xcel Energy Inc.93 
(d)
(e)
(a)Given that the manufacturing of equipment has not yet commenced, related exposure to the performance obligations of Capital Services at Dec. 31, 2024 has been assessed as immaterial.
(b)Nonperformance and/or nonpayment.
(c)The surety bonds primarily relate to workers compensation benefits and utility projects. The workers compensation bonds are renewed annually and the project based bonds expire in conjunction with the completion of the related projects.
(d)Due to the number of projects associated with the surety bonds, the total current exposure of this indemnification cannot be determined. Xcel Energy Inc. believes the exposure to be significantly less than the total amount of the outstanding bonds.
(e)Per the indemnity agreement between Xcel Energy Inc. and the various surety companies, surety companies have the discretion to demand that collateral be posted.
    
Payment or Performance Guarantee | Guarantee of Capital Services purchase contract for solar generating equipment      
Money Pool [Abstract]      
Guarantor Obligations, Maximum Exposure, Undiscounted [1],[2] $ 951    
Payment or Performance Guarantee | Guarantees of Xcel Energy Inc.'s utility subsidiaries' performance on tax credit sale agreements      
Money Pool [Abstract]      
Operating Lease, Residual Value of Leased Asset [2],[3] 29    
Payment or Performance Guarantee | Surety Bonds      
Money Pool [Abstract]      
Guarantor Obligations, Maximum Exposure, Undiscounted [4],[5] 93    
Xcel Energy Inc.      
Dividends [Abstract]      
Cash dividends paid to Xcel Energy by subsidiaries 1,685 1,693 $ 1,503
Money Pool [Abstract]      
Loan outstanding at period end 0 21 0
Average loan outstanding 18 27 10
Maximum loan outstanding $ 209 $ 250 $ 204
Weighted average interest rate, computed on a daily basis (percentage) 5.34% 5.33% 0.73%
Interest Income, Other $ 1 $ 1 $ 0
Weighted average interest rate at period end (percentage) 5.34% 5.34%  
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] $ 410 $ 403  
Xcel Energy Inc. | NSP Minnesota      
Money Pool [Abstract]      
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] 79 120  
Xcel Energy Inc. | NSP-Wisconsin      
Money Pool [Abstract]      
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] 11 13  
Xcel Energy Inc. | PSCo      
Money Pool [Abstract]      
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] 77 44  
Xcel Energy Inc. | SPS      
Money Pool [Abstract]      
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] 41 47  
Xcel Energy Inc. | Xcel Energy Services Inc.      
Money Pool [Abstract]      
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] 163 144  
Xcel Energy Inc. | Other Subsidiaries      
Money Pool [Abstract]      
Other Receivable, after Allowance for Credit Loss, Current, Related and Nonrelated Party Status [Extensible Enumeration] $ 39 $ 35  
[1] Given that the manufacturing of equipment has not yet commenced, related exposure to the performance obligations of Capital Services at Dec. 31, 2024 has been assessed as immaterial.
[2] Nonperformance and/or nonpayment.
[3] The surety bonds primarily relate to workers compensation benefits and utility projects. The workers compensation bonds are renewed annually and the project based bonds expire in conjunction with the completion of the related projects.
[4] Due to the number of projects associated with the surety bonds, the total current exposure of this indemnification cannot be determined. Xcel Energy Inc. believes the exposure to be significantly less than the total amount of the outstanding bonds.
[5] Per the indemnity agreement between Xcel Energy Inc. and the various surety companies, surety companies have the discretion to demand that collateral be posted.