Other Income (Expense) - net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income [Line Items]
Economic foreign currency exchange contracts	$ 150	$ (261)	$ 384
Defined benefit plans - non-service credits	257	167	112
Interest income	6	2	3
Allowance for funds used during construction - equity component	21	16	19
Miscellaneous	6	17	6
Total Other Income	440	(59)	524
Other Expense [Line Items]
Charitable contributions	24	8	9
Miscellaneous	20	21	13
Total Other Expense	44	29	22
Other Income (Expense) - net	396	(88)	502
PPL Electric Utilities Corp [Member]
Other Income [Line Items]
Defined benefit plans - non-service credits	5	1	3
Interest income	2	1	1
Allowance for funds used during construction - equity component	20	15	18
Miscellaneous	0	0	2
Total Other Income	27	17	24
Other Expense [Line Items]
Charitable contributions	3	2	2
Miscellaneous	1	3	2
Total Other Expense	4	5	4
Other Income (Expense) - net	$ 23	$ 12	$ 20