CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Net income (loss)	$ 405		$ 271		$ 818		$ 816
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	(7)		(179)		(252)		(103)
Available-for-sale securities, net of tax	2		(7)		25		17
Qualifying derivatives, net of tax	24		2		86		80
Equity investees' other comprehensive income (loss), net of tax			1				(3)
Defined benefit plans:
Net actuarial gain (loss), net of tax			(85)				(85)
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(1)		(1)		(2)		(6)
Qualifying derivatives, net of tax	(36)		(140)		(116)		(274)
Defined benefit plans:
Prior service costs, net of tax	2		2		3		5
Net actuarial loss, net of tax	34		17		68		37
Total other comprehensive income (loss)	18		(390)		(188)		(332)
Comprehensive income (loss)	423		(119)		630		484
Comprehensive income attributable to noncontrolling interests							4
Comprehensive income (loss) attributable to Shareowners	423		(119)		630		480
PPL Energy Supply LLC [Member]
Net income (loss)	86		19		48		328
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Available-for-sale securities, net of tax	2		(7)		25		17
Qualifying derivatives, net of tax			(9)				59
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(1)		(1)		(2)		(6)
Qualifying derivatives, net of tax	(37)		(108)		(67)		(259)
Defined benefit plans:
Prior service costs, net of tax	1		2		2		3
Net actuarial loss, net of tax	4		1		8		6
Total other comprehensive income (loss)	(31)		(122)		(34)		(180)
Comprehensive income (loss) attributable to Shareowners	55		(103)		14		148
PPL Electric Utilities Corp [Member]
Net income (loss)	45	[1]	29	[1]	109	[1]	66	[1]
LG And E And KU Energy LLC [Member]
Net income (loss)	64	[1]	44	[1]	160	[1]	97	[1]
Defined benefit plans:
Total other comprehensive income (loss)					(1)		(4)
Louisville Gas And Electric Co [Member]
Net income (loss)	29	[2]	26	[2]	73	[2]	51	[2]
Kentucky Utilities Co [Member]
Net income (loss)	44	[1]	30	[1]	108	[1]	68	[1]
Defined benefit plans:
Total other comprehensive income (loss)							$ (4)

[1] Net income approximates comprehensive income.

[2] Net income equals comprehensive income.