Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	$ 76	$ 73
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	22	21
Depreciation and other items not normalized	(5)	(3)
Amortization of excess deferred income taxes	(12)	(18)
Other	(2)	1
Total increase (decrease)	3	1
Total income tax expense (benefit)	79	74
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
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	14	16
Depreciation and other items not normalized	(4)	(3)
Amortization of excess deferred income taxes	(2)	(3)
Other	(1)	(1)
Total increase (decrease)	7	9
Total income tax expense (benefit)	45	50
Louisville Gas And Electric Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	23	24
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	4	4
Amortization of excess deferred income taxes	(3)	(7)
Other	(1)	(2)
Total increase (decrease)	0	(5)
Total income tax expense (benefit)	23	19
Kentucky Utilities Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	23	28
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	4	5
Amortization of excess deferred income taxes	(4)	(6)
Other	(1)	(3)
Total increase (decrease)	(1)	(4)
Total income tax expense (benefit)	$ 22	$ 24