Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	$ 30	$ 32	$ 107	$ 104
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	11	27	33	48
Depreciation and other items not normalized	(2)	(5)	(7)	(8)
Valuation allowance adjustments	5	7	7	10
Amortization of excess deferred income taxes	(8)	(22)	(20)	(40)
Other	(3)	(3)	(7)	(1)
Total increase (decrease)	3	0	5	2
Total income tax expense (benefit)	33	32	112	106
Amortization of investment tax credit including deferred taxes on basis adjustment	0	(4)	(1)	(7)
PPL Electric Utilities Corp [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	31	35	70	76
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	11	13	24	28
Depreciation and other items not normalized	(3)	(3)	(7)	(6)
Amortization of excess deferred income taxes	(2)	(2)	(4)	(5)
Other	1	1	0	1
Total increase (decrease)	7	9	13	18
Total income tax expense (benefit)	38	44	83	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	12	13	35	37
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	2	2	6	7
Amortization of excess deferred income taxes	(3)	(7)	(6)	(14)
Other	0	1	(1)	(2)
Total increase (decrease)	(1)	(4)	(1)	(9)
Total income tax expense (benefit)	11	9	34	28
Kentucky Utilities Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	13	17	36	45
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	3	3	7	8
Amortization of excess deferred income taxes	(4)	(6)	(8)	(12)
Other	1	1	0	(2)
Total increase (decrease)	0	(2)	(1)	(6)
Total income tax expense (benefit)	$ 13	$ 15	$ 35	$ 39