v3.25.2
Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate $ 48 $ 50 $ 157 $ 132
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 8 11 28 28
Depreciation and other items not normalized (5) (5) (14) (10)
Valuation allowance adjustments 2 2 6 5
Amortization of excess deferred income taxes (6) (7) (21) (20)
Other 1 (1) (3) (2)
Total increase (decrease) (1) 0 (8) (1)
Total income tax expense (benefit) 47 50 149 131
Amortization of investment tax credit including deferred taxes on basis adjustment (1) 0 (4) (2)
PPL Electric Utilities Corp [Member]        
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate 38 41 88 83
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 11 13 27 26
Depreciation and other items not normalized (6) (6) (12) (10)
Amortization of excess deferred income taxes (2) (3) (5) (5)
Other 2 1 (1) 0
Total increase (decrease) 5 5 9 11
Total income tax expense (benefit) 43 46 97 94
Louisville Gas And Electric Co [Member]        
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate 15 17 42 41
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 3 3 8 7
Amortization of excess deferred income taxes (3) (3) (7) (6)
Other (1) 0 (3) (1)
Total increase (decrease) (1) 0 (2) 0
Total income tax expense (benefit) 14 17 40 41
Kentucky Utilities Co [Member]        
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate 20 20 53 48
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 4 4 10 9
Amortization of excess deferred income taxes (4) (4) (9) (9)
Other (1) (1) (4) (2)
Total increase (decrease) (1) (1) (3) (2)
Total income tax expense (benefit) $ 19 $ 19 $ 50 $ 46