Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	$ 81	$ 76
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	17	22
Depreciation and other items not normalized	(5)	(5)
Amortization of excess deferred income taxes	(13)	(12)
Other	1	(2)
Total increase (decrease)	0	3
Total income tax expense (benefit)	81	79
PPL Electric Utilities Corp [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	41	38
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	14	14
Depreciation and other items not normalized	(4)	(4)
Amortization of excess deferred income taxes	(2)	(2)
Other	(1)	(1)
Total increase (decrease)	7	7
Total income tax expense (benefit)	48	45
Louisville Gas And Electric Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	25	23
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	4	4
Amortization of excess deferred income taxes	(3)	(3)
Other	(2)	(1)
Total increase (decrease)	(1)	0
Total income tax expense (benefit)	24	23
Kentucky Utilities Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	28	23
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	5	4
Amortization of excess deferred income taxes	(5)	(4)
Other	(1)	(1)
Total increase (decrease)	(1)	(1)
Total income tax expense (benefit)	$ 27	$ 22