Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	$ 50	$ 30	$ 132	$ 107
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	11	11	28	33
Depreciation and other items not normalized	(5)	(2)	(10)	(7)
Valuation allowance adjustments	2	5	5	7
Amortization of excess deferred income taxes	(7)	(8)	(20)	(20)
Other	(1)	(3)	(4)	(8)
Total increase (decrease)	0	3	(1)	5
Total income tax expense (benefit)	50	33	131	112
PPL Electric Utilities Corp [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	41	31	83	70
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	13	11	26	24
Depreciation and other items not normalized	(6)	(3)	(10)	(7)
Amortization of excess deferred income taxes	(3)	(2)	(5)	(4)
Other	1	1	0	0
Total increase (decrease)	5	7	11	13
Total income tax expense (benefit)	46	38	94	83
Louisville Gas And Electric Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	17	12	41	35
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	3	2	7	6
Amortization of excess deferred income taxes	(3)	(3)	(6)	(6)
Other	0	0	(1)	(1)
Total increase (decrease)	0	(1)	0	(1)
Total income tax expense (benefit)	17	11	41	34
Kentucky Utilities Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	20	13	48	36
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	4	3	9	7
Amortization of excess deferred income taxes	(4)	(4)	(9)	(8)
Other	(1)	1	(2)	0
Total increase (decrease)	(1)	0	(2)	(1)
Total income tax expense (benefit)	$ 19	$ 13	$ 46	$ 35