CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income		$ 393	$ 497	$ 283	$ 1,042
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax		52	(48)	(97)	80
Available-for-sale securities, net of tax		0	(1)	7	18
Qualifying derivatives, net of tax		(19)	(5)	8	(52)
Defined benefit plans:
Prior service costs, net of tax		0	0	(6)	0
Net actuarial gain (loss), net of tax		0	(1)	52	(3)
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax		0	(3)	(2)	(5)
Qualifying derivatives, net of tax		10	(12)	20	2
Equity investee's other comprehensive (income) loss, net of tax		0	0	(1)	0
Defined benefit plans:
Prior service costs, net of tax		0	1	0	3
Net actuarial loss, net of tax		35	29	111	84
Total other comprehensive income (loss)		78	(40)	92	127
Comprehensive income		471	457	375	1,169
PPL Electric Utilities Corp [Member]
Net income	[1]	55	57	191	194
LG And E And KU Energy LLC [Member]
Net income		120	91	297	271
Defined benefit plans:
Net actuarial gain (loss), net of tax		0	0	(8)	(2)
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Equity investee's other comprehensive (income) loss, net of tax		0	0	(1)	(1)
Defined benefit plans:
Prior service costs, net of tax		0	0	1	0
Net actuarial loss, net of tax		1	0	2	0
Total other comprehensive income (loss)		1	0	(6)	(3)
Comprehensive income		121	91	291	268
Louisville Gas And Electric Co [Member]
Net income	[2]	58	46	146	133
Kentucky Utilities Co [Member]
Net income	[1]	$ 72	$ 56	189	173
Defined benefit plans:
Total other comprehensive income (loss)				$ (1)	$ (1)

[1] Net income approximates comprehensive income.

[2] Net income equals comprehensive income.