Other Income (Expense) - net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Other Income
Defined benefit plans - non-service credits	$ 6	$ 1	$ 18	$ 4
Interest Income	6	0	10	1
AFUDC - equity component	4	7	13	15
Miscellaneous	2	1	7	3
Total Other Income	18	9	48	23
Other Expense
Charitable Contributions	0	0	2	2
Miscellaneous	6	3	21	10
Total Other Expense	6	3	23	12
Other Income (Expense) - net	12	6	25	11
PPL Electric Utilities Corp [Member]
Other Expense
Other Income (Expense) - net	$ 6	$ 7	$ 16	$ 15