Other Income (Expense) - net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other Income
Defined benefit plans - non-service credits	$ 8	$ 9	$ 23	$ 32
AFUDC - equity component	23	13	58	33
Miscellaneous	2	0	(4)	(4)
Other Expense
Other Income (Expense) - net	39	32	90	86
Interest Income (Expense), Nonoperating, Net	6	10	13	25
PPL Electric Utilities Corp [Member]
Other Income
Defined benefit plans - non-service credits	4	4	11	13
AFUDC - equity component	8	6	23	17
Miscellaneous	(1)	0	(4)	(2)
Other Expense
Other Income (Expense) - net	14	13	36	33
Interest Income (Expense), Nonoperating, Net	3	3	6	5
Louisville Gas And Electric Co [Member]
Other Income
Defined benefit plans - non-service credits	0	0	1	3
AFUDC - equity component	4	2	11	5
Miscellaneous	4	1	4	1
Other Expense
Other Income (Expense) - net	8	3	16	9
Kentucky Utilities Co [Member]
Other Income
Defined benefit plans - non-service credits	1	2	4	6
AFUDC - equity component	6	3	14	6
Miscellaneous	2	(1)	1	(2)
Other Expense
Other Income (Expense) - net	$ 9	$ 4	$ 19	$ 10