Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	$ 57	$ 60	$ 189	$ 167
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	20	16	48	49
Depreciation and other items not normalized	(4)	(2)	(14)	(9)
Effective Income Tax Rate Reconciliation, Tax Credit, Amount	(2)	(9)	(4)	(11)
Amortization of excess deferred income taxes	(13)	(13)	(33)	(33)
Other	0	6	3	7
Total increase (decrease)	1	(2)	0	3
Total income tax expense (benefit)	58	58	189	170
PPL Electric Utilities Corp [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	40	38	122	107
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	13	13	39	36
Depreciation and other items not normalized	(2)	(1)	(12)	(8)
Amortization of excess deferred income taxes	(3)	(4)	(8)	(8)
Other	(1)	(3)	0	(1)
Total increase (decrease)	7	5	19	19
Total income tax expense (benefit)	47	43	141	126
Louisville Gas And Electric Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	20	21	62	56
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	4	4	11	10
Amortization of excess deferred income taxes	(3)	(3)	(9)	(9)
Other	(1)	(1)	(3)	(2)
Total increase (decrease)	0	0	(1)	(1)
Total income tax expense (benefit)	20	21	61	55
Kentucky Utilities Co [Member]
Reconciliation of Income Tax Expense [Abstract]
Federal income tax on Income Before Income Taxes at statutory tax rate	26	26	74	63
Increase (decrease) due to: [Abstract]
State income taxes, net of federal income tax benefit	4	5	13	12
Amortization of excess deferred income taxes	(4)	(5)	(13)	(13)
Other	(2)	(2)	(4)	(3)
Total increase (decrease)	(2)	(2)	(4)	(4)
Total income tax expense (benefit)	$ 24	$ 24	$ 70	$ 59