Other Income (Expense) - net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income [Line Items]
Defined benefit plans - non-service credits	$ 21	$ (2)	$ 8
Interest income	12	9	15
Allowance for funds used during construction - equity component	18	20	23
Miscellaneous	10	7	7
Total Other Income	61	34	53
Other Expense [Line Items]
Charitable contributions	14	3	17
Miscellaneous	32	29	22
Total Other Expense	46	32	39
Other Income (Expense) - net	15	2	14
PPL Electric Utilities Corp [Member]
Other Income [Line Items]
Defined benefit plans - non-service credits	9	4	4
Interest income	0	2	2
Allowance for funds used during construction - equity component	18	19	23
Total Other Income	27	25	29
Other Expense [Line Items]
Charitable contributions	3	3	3
Miscellaneous	3	4	1
Total Other Expense	6	7	4
Other Income (Expense) - net	$ 21	$ 18	$ 25