Benefit Plans and Other Postretirement Benefits, Postretirement Health Care Benefits (Details) $ in Millions	Dec. 31, 2023 USD ($) Employees	Dec. 31, 2022 USD ($)
Postretirement Health Care Benefits [Abstract]
Estimated costs of health plan subsidies - VRP | $	$ 2
Estimated cost of other medical benefits - VRP | $		$ 0
Voluntary Retirement Program | Xcel Energy [Member]
Postretirement Health Care Benefits [Abstract]
Entity Number of Employees | Employees	400
Employee Severance | Xcel Energy [Member]
Postretirement Health Care Benefits [Abstract]
Entity Number of Employees | Employees	150
Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%	100.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, VRP	0.0550
Defined Benefit Plan, Health Care Cost Trend Rate Assumed and Ultimate Trend Assumption, VRP	0.0700
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	9.00%	16.00%
Domestic and international equity securities | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	31.00%	33.00%
Short-to-intermediate fixed income securities | Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	77.00%	71.00%
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	13.00%	12.00%
Alternative investments | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	20.00%	18.00%
Cash | Other Postretirement Benefits Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	1.00%	1.00%
Cash | Pension Plan [Member]
Postretirement Health Care Benefits [Abstract]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	2.00%	2.00%