Other Income (Expense)- net Other Income (Expense) - net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income
Economic foreign currency exchange contracts	$ 164	$ (113)	$ 52	$ (156)
Defined benefit plans - non-service credits	66	44	134	82
Interest Income	2	0	2	1
AFUDC - equity component	5	4	10	6
Miscellaneous	0	0	1	9
Total Other Income	237	(65)	199	(58)
Other Expense
Charitable Contributions	1	1	5	5
Miscellaneous	2	2	3	14
Total Other Expense	3	3	8	19
Other Income (Expense) - net	234	(68)	191	(77)
PPL Electric Utilities Corp [Member]
Other Income
Defined benefit plans - non-service credits	1	1	3	0
AFUDC - equity component	5	4	10	6
Miscellaneous	1	0	1	0
Total Other Income	7	5	14	6
Other Expense
Charitable Contributions	0	0	1	1
Miscellaneous	0	1	0	1
Total Other Expense	0	1	1	2
Other Income (Expense) - net	$ 7	$ 4	$ 13	$ 4