CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Net income (loss)	$ 413		$ 545
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	(245)		76
Available-for-sale securities, net of tax	23		24
Qualifying derivatives, net of tax	62		78
Equity investees' other comprehensive income (loss), net of tax			(4)
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(1)		(5)
Qualifying derivatives, net of tax	(80)		(134)
Defined benefit plans:
Prior service costs, net of tax	1		3
Net actuarial loss, net of tax	34		20
Total other comprehensive income (loss)	(206)		58
Comprehensive income (loss)	207		603
Comprehensive income attributable to noncontrolling interests			4
Comprehensive income (loss) attributable to Shareowners	207		599
PPL Energy Supply LLC [Member]
Net income (loss)	(38)		309
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Available-for-sale securities, net of tax	23		24
Qualifying derivatives, net of tax			68
Reclassifications from accumulated other comprehensive income (loss) - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(1)		(5)
Qualifying derivatives, net of tax	(30)		(151)
Defined benefit plans:
Prior service costs, net of tax	1		1
Net actuarial loss, net of tax	4		5
Total other comprehensive income (loss)	(3)		(58)
Comprehensive income (loss) attributable to Shareowners	(41)		251
PPL Electric Utilities Corp [Member]
Net income (loss)	64	[1]	37	[1]
LG And E And KU Energy LLC [Member]
Net income (loss)	96	[1]	53	[1]
Defined benefit plans:
Total other comprehensive income (loss)	(1)		(4)
Louisville Gas And Electric Co [Member]
Net income (loss)	44	[2]	25	[2]
Kentucky Utilities Co [Member]
Net income (loss)	64	[1]	38	[1]
Defined benefit plans:
Total other comprehensive income (loss)			$ (4)

[1] Net income approximates comprehensive income.

[2] Net income equals comprehensive income.