Benefit Plans and Other Postretirement Benefits, Postretirement Health Care Benefits (Details) - Employees	Dec. 31, 2024	Dec. 31, 2023
Voluntary Retirement Program | Xcel Energy [Member]
Postretirement Health Care Benefits [Abstract]
Entity Number of Employees	400
Employee Severance | Xcel Energy [Member]
Postretirement Health Care Benefits [Abstract]
Entity Number of Employees	150
Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%	100.00%
Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%	100.00%
Domestic and international equity securities | Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	25.00%	9.00%
Domestic and international equity securities | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	31.00%	31.00%
Short-to-intermediate fixed income securities | Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	61.00%	77.00%
Short-to-intermediate fixed income securities | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	9.00%	9.00%
Alternative investments | Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	11.00%	13.00%
Alternative investments | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	20.00%	20.00%
Cash | Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	3.00%	1.00%
Cash | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	2.00%	2.00%