v3.26.1
Income Taxes - PAC - Reconciliation of Effective Income Tax Rate (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Amount    
U.S. federal statutory income tax rate $ 184 $ 200
State and local income taxes, net of federal income tax effect 18 14
Energy-related tax credits (564) (560)
Effects of ratemaking (19) (25)
Total $ (430) $ (399)
Percent    
U.S. federal statutory income tax rate 21.00% 21.00%
State and local income taxes, net of federal income tax 2.10% 1.50%
Energy-related tax credits (64.20%) (58.80%)
Effects of ratemaking (2.30%) (2.60%)
Effective income tax rate (49.00%) (41.80%)
PAC    
Amount    
U.S. federal statutory income tax rate $ 10 $ 33
State and local income taxes, net of federal income tax effect 4 8
Energy-related tax credits (30) (47)
Effects of ratemaking (5) (13)
Total $ (21) $ (19)
Percent    
U.S. federal statutory income tax rate 21.00% 21.00%
State and local income taxes, net of federal income tax 8.20% 4.90%
Energy-related tax credits (60.30%) (29.70%)
Effects of ratemaking (11.30%) (8.40%)
Effective income tax rate (42.40%) (12.20%)