Other Income (Expense) - net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income [Line Items]
Economic foreign currency exchange contracts	$ (98)	$ (14)	$ 150
Defined benefit plans - non-service credits	262	316	257
Interest income	10	16	6
Allowance for funds used during construction - equity component	20	23	21
Miscellaneous	7	7	6
Total Other Income	201	348	440
Other Expense [Line Items]
Charitable contributions	3	17	24
Miscellaneous	29	22	20
Total Other Expense	32	39	44
Other Income (Expense) - net	169	309	396
PPL Electric Utilities Corp [Member]
Other Income [Line Items]
Defined benefit plans - non-service credits	4	4	5
Interest income	2	2	2
Allowance for funds used during construction - equity component	19	23	20
Total Other Income	25	29	27
Other Expense [Line Items]
Charitable contributions	3	3	3
Miscellaneous	4	1	1
Total Other Expense	7	4	4
Other Income (Expense) - net	$ 18	$ 25	$ 23