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Income Taxes (Details)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent (1.20%) (0.60%)
Plant regulatory differences (b) [1] (6.70%) (5.60%)
Federal statutory rate 21.00% 21.00%
State income tax on pretax income, net of federal tax effect 4.70% 4.80%
Effective Income Tax Rate Reconciliation, Tax Credit, Percent [2] (33.10%) (25.90%)
Other, net 0.80% 0.40%
Effective income tax rate (14.50%) (5.90%)
[1] Plant regulatory differences primarily relate to the credit of excess deferred taxes to customers. Income tax benefits associated with the credit are offset by corresponding revenue reductions.
[2] Wind and solar PTCs (net of estimated transfer discounts) are generally credited to customers (reduction to revenue) and do not materially impact net income