v3.26.1
Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate $ 60 $ 48 $ 178 $ 157
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 14 15 38 37
Amortization of excess deferred income taxes (11) (7) (25) (23)
Other 2 (3) (6) (5)
Total increase (decrease) (4) (1) (14) (8)
Total income tax expense 56 47 164 149
Allowance for Funds Used During Construction Equity (6) (3) (13) (8)
Flow-through rate-making (3) (3) (8) (9)
Utility Rate-Making Tax Adjustments (Federal and State) (20) (13) (46) (40)
PPL Electric Utilities Corp [Member]        
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate 35 38 86 88
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 10 12 24 26
Amortization of excess deferred income taxes (2) (2) (4) (5)
Other 2 1 0 0
Total increase (decrease) 2 5 7 9
Total income tax expense 37 43 93 97
Allowance for Funds Used During Construction Equity (3) (2) (5) (3)
Flow-through rate-making (5) (4) (8) (9)
Utility Rate-Making Tax Adjustments (Federal and State) (10) (8) (17) (17)
Louisville Gas And Electric Co [Member]        
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate 16 15 51 42
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 3 3 9 8
Amortization of excess deferred income taxes (2) (2) (8) (7)
Other 0 (1) 0 (1)
Total increase (decrease) 0 (1) (2) (2)
Total income tax expense 16 14 49 40
Allowance for Funds Used During Construction Equity (1) (1) (3) (2)
Utility Rate-Making Tax Adjustments (Federal and State) (3) (3) (11) (9)
Kentucky Utilities Co [Member]        
Reconciliation of Income Tax Expense [Abstract]        
Federal income tax on Income Before Income Taxes at statutory tax rate 21 20 58 53
Increase (decrease) due to: [Abstract]        
State income taxes, net of federal income tax benefit 4 4 11 9
Amortization of excess deferred income taxes (3) (3) (9) (9)
Other (2) (1) (2) (1)
Total increase (decrease) (2) (1) (3) (3)
Total income tax expense 19 19 55 50
Allowance for Funds Used During Construction Equity (1) (1) (3) (2)
Utility Rate-Making Tax Adjustments (Federal and State) $ (4) $ (4) $ (12) $ (11)