v3.25.2
Income Taxes - Reconciliation to Effective Tax Rate (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Effective Income Tax Rate Reconciliation, Percent [Abstract]        
U.S. federal statutory income tax 21.00% 21.00% 21.00% 21.00%
State income taxes, net of federal income tax benefit 3.80% 2.50% 3.30% (2.00%)
Foreign tax effects 0.00% 0.10% 0.10% 0.10%
PTC (0.90%) (8.90%) (0.90%) (7.40%)
Amortization of ITC, including deferred taxes on basis differences (0.20%) (0.20%) (0.40%) (0.20%)
Other (0.20%) (0.70%) (0.40%) (0.70%)
Share-based payment awards (0.10%) 0.00% (2.80%) (0.80%)
Excess officers compensation 0.70% 0.50% 1.10% 0.40%
Other 0.00% 0.40% 0.00% 0.10%
Qualified NDT fund income and losses 10.50% 1.30% 11.40% 5.30%
Effective income tax 34.60% 16.00% 32.40% 15.80%
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]        
U.S. federal statutory income tax $ 267 $ 202 $ 299 $ 422
State income taxes, net of federal income tax benefit 48 24 47 (40)
Foreign tax effects 0 1 1 2
PTC (11) (86) (13) (149)
Amortization of ITC, including deferred taxes on basis differences (3) (2) (5) (4)
Other (3) (7) (5) (14)
Share-based payment awards (1) 0 (40) (16)
Excess officers compensation 9 5 16 8
Other 0 4 0 2
Qualified NDT fund income and losses 134 13 162 107
Income tax (benefit) expense $ 440 $ 154 $ 462 $ 318