v3.25.2
Benefit Plans and Other Postretirement Benefits (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2025
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Components of Net Periodic Benefit Cost [Abstract]          
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement [1]       $ 31  
Pension Plan [Member]          
Components of Net Periodic Benefit Cost [Abstract]          
Service Cost   $ 5 $ 6 10 $ 11
Interest cost (a) [2]   9 8 18 17
Expected return on plan assets (a) [2]   (11) (12) (22) (23)
Amortization of net loss (a) [2]   3 3 6 6
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement [1]   0 31 0 31
Net periodic benefit cost   6 36 12 42
Effects of regulation   2 (32) 4 (29)
Net benefit cost recognized for financial reporting   8 4 16 13
Total contributions to the pension plans during the period $ 54        
Pension Plan [Member] | Xcel Energy Inc.          
Components of Net Periodic Benefit Cost [Abstract]          
Total contributions to the pension plans during the period $ 125        
Other Postretirement Benefits Plan [Member]          
Components of Net Periodic Benefit Cost [Abstract]          
Service Cost   0 0 0 0
Interest cost (a) [2]   1 0 2 1
Expected return on plan assets (a) [2]   0 0 0 0
Amortization of net loss (a) [2]   0 0 0 0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement [1]   0 0 0 0
Net periodic benefit cost   1 0 2 1
Effects of regulation   0 0 0 0
Net benefit cost recognized for financial reporting   $ 1 $ 0 $ 2 $ 1
[1] A settlement charge is required when the amount of lump-sum distributions during the year is greater than the sum of the service and interest cost components of the annual net periodic pension cost. In the second quarter of 2024, as a result of lump-sum distributions during the 2024 plan year, NSP-Minnesota recorded a pension settlement charge of $31 million, which was not recognized in earnings due to the effects of rate making.
[2] The components of net periodic cost other than the service cost component are included in the line item “Other income, net” in the consolidated statements of income or capitalized on the consolidated balance sheets as a regulatory asset.