Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	$ 108	$ 81
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	20	17
Depreciation and other items not normalized	(10)	(5)
Amortization of excess deferred income taxes	(15)	(13)
Other	(1)	1
Total increase (decrease)	(6)	0
Total income tax expense (benefit)	102	81
PPL Electric Utilities Corp [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	50	41
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	15	14
Depreciation and other items not normalized	(6)	(4)
Amortization of excess deferred income taxes	(3)	(2)
Other	(2)	(1)
Total increase (decrease)	4	7
Total income tax expense (benefit)	54	48
Louisville Gas And Electric Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	27	25
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	5	4
Amortization of excess deferred income taxes	(4)	(3)
Other	(2)	(2)
Total increase (decrease)	(1)	(1)
Total income tax expense (benefit)	26	24
Kentucky Utilities Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	33	28
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	6	5
Amortization of excess deferred income taxes	(5)	(5)
Other	(3)	(1)
Total increase (decrease)	(2)	(1)
Total income tax expense (benefit)	$ 31	$ 27