CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Net income (loss)	$ 1,737		$ 1,131		$ 1,531
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	(275)		138		94
Available-for-sale securities, net of tax	35		67		29
Qualifying derivatives, net of tax	(10)		45		39
Equity investees' other comprehensive income (loss), net of tax	0		0		2
Defined benefit plans:
Prior service costs, net of tax	5		2		1
Net actuarial gain (loss), net of tax	(509)		71		(965)
Reclassifications to net income - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(6)		(6)		(7)
Qualifying derivatives, net of tax	(64)		(83)		(434)
Defined benefit plans:
Prior service costs, net of tax	4		6		10
Net actuarial loss, net of tax	111		135		79
Total other comprehensive income (loss)	(709)		375		(1,152)
Comprehensive income (loss)	1,028		1,506		379
Comprehensive income attributable to noncontrolling interests	0		1		5
Comprehensive income (loss) attributable to Shareowners	1,028		1,505		374
PPL Energy Supply LLC [Member]
Net income (loss)	410		(229)		475
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Available-for-sale securities, net of tax	35		67		29
Qualifying derivatives, net of tax	0		0		68
Defined benefit plans:
Prior service costs, net of tax	8		2		1
Net actuarial gain (loss), net of tax	(120)		71		(82)
Reclassifications to net income - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(6)		(6)		(7)
Qualifying derivatives, net of tax	(25)		(123)		(463)
Defined benefit plans:
Prior service costs, net of tax	3		4		5
Net actuarial loss, net of tax	5		14		10
Total other comprehensive income (loss)	(100)		29		(439)
Comprehensive income (loss)	310		(200)		36
Comprehensive income attributable to noncontrolling interests	0		1		1
Comprehensive income (loss) attributable to Shareowners	310		(201)		35
PPL Electric Utilities Corp [Member]
Net income (loss)	263	[1]	209	[1]	136	[1]
LG And E And KU Energy LLC [Member]
Net income (loss)	344		347		219
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Equity investees' other comprehensive income (loss), net of tax	0		0		1
Defined benefit plans:
Prior service costs, net of tax	(7)		0		0
Net actuarial gain (loss), net of tax	(50)		28		(21)
Reclassifications to net income - (gains) losses, net of tax expense (benefit):
Equity investee's other comprehensive (income) loss, net of tax	(1)		0		0
Defined benefit plans:
Prior service costs, net of tax	1		0		0
Net actuarial loss, net of tax	(1)		0		1
Total other comprehensive income (loss)	(58)		28		(19)
Comprehensive income (loss) attributable to Shareowners	286		375		200
Louisville Gas And Electric Co [Member]
Net income (loss)	169	[2]	163	[2]	123	[2]
Kentucky Utilities Co [Member]
Net income (loss)	220	[1]	228	[1]	137	[1]
Defined benefit plans:
Total other comprehensive income (loss)	$ (1)				$ 1

[1] Net income approximates comprehensive income.

[2] Net income equals comprehensive income.