CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Net income (loss)	$ 411		$ 355		$ 1,229		$ 1,171
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	87		152		(165)		49
Available-for-sale securities, net of tax	15		13		40		30
Qualifying derivatives, net of tax	(9)		(41)		77		39
Equity investees' other comprehensive income (loss), net of tax							(3)
Defined benefit plans:
Net actuarial gain (loss), net of tax							(85)
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax					(2)		(6)
Qualifying derivatives, net of tax	(6)		(61)		(122)		(335)
Equity investee's other comprehensive (income) loss, net of tax	(1)				(1)
Defined benefit plans:
Prior service costs, net of tax	2		1		5		6
Net actuarial loss, net of tax	33		17		101		54
Total other comprehensive income (loss)	121		81		(67)		(251)
Comprehensive income (loss)	532		436		1,162		920
Comprehensive income attributable to noncontrolling interests	1				1		4
Comprehensive income (loss) attributable to Shareowners	531		436		1,161		916
PPL Energy Supply LLC [Member]
Net income (loss)	125		55		173		383
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Available-for-sale securities, net of tax	15		13		40		30
Qualifying derivatives, net of tax			(1)				58
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax					(2)		(6)
Qualifying derivatives, net of tax	(29)		(92)		(96)		(351)
Defined benefit plans:
Prior service costs, net of tax	1		1		3		4
Net actuarial loss, net of tax	3		2		11		8
Total other comprehensive income (loss)	(10)		(77)		(44)		(257)
Comprehensive income (loss)	115		(22)		129		126
Comprehensive income attributable to noncontrolling interests	1		1		1		1
Comprehensive income (loss) attributable to Shareowners	114		(23)		128		125
PPL Electric Utilities Corp [Member]
Net income (loss)	51	[1]	33	[1]	160	[1]	99	[1]
LG And E And KU Energy LLC [Member]
Net income (loss)	100	[1]	83	[1]	260	[1]	180	[1]
Defined benefit plans:
Total other comprehensive income (loss)					(1)		(4)
Louisville Gas And Electric Co [Member]
Net income (loss)	49	[2]	43	[2]	122	[2]	94	[2]
Kentucky Utilities Co [Member]
Net income (loss)	63	[2]	50	[2]	171	[2]	118	[2]
Defined benefit plans:
Total other comprehensive income (loss)							$ (4)

[1] Net income approximates comprehensive income.

[2] Net income equals comprehensive income.