CONSOLIDATED STATEMENTS OF EQUITY (USD $) In Millions, except Share data in Thousands		Total		Common Stock		Additional Paid-in Capital	Earnings Reinvested	Accumulated Other Comprehensive Loss		Non-controlling Interests	PPL Energy Supply LLC [Member]	PPL Energy Supply LLC [Member] Member's Equity		PPL Energy Supply LLC [Member] Non-controlling Interests	PPL Electric Utilities Corp [Member]		PPL Electric Utilities Corp [Member] Common Stock		PPL Electric Utilities Corp [Member] Preferred Securities	PPL Electric Utilities Corp [Member] Additional Paid-in Capital	PPL Electric Utilities Corp [Member] Earnings Reinvested	LG And E And KU Energy LLC [Member]	LG And E And KU Energy LLC [Member] Successor [Member]		LG And E And KU Energy LLC [Member] Predecessor [Member]		LG And E And KU Energy LLC [Member] Member's Equity Successor [Member]		LG And E And KU Energy LLC [Member] Member's Equity Predecessor [Member]		LG And E And KU Energy LLC [Member] Non-controlling Interests Successor [Member]	LG And E And KU Energy LLC [Member] Non-controlling Interests Predecessor [Member]	Louisville Gas And Electric Co [Member]	Louisville Gas And Electric Co [Member] Successor [Member]	Louisville Gas And Electric Co [Member] Predecessor [Member]	Louisville Gas And Electric Co [Member] Common Stock Successor [Member]		Louisville Gas And Electric Co [Member] Common Stock Predecessor [Member]		Louisville Gas And Electric Co [Member] Additional Paid-in Capital Successor [Member]	Louisville Gas And Electric Co [Member] Additional Paid-in Capital Predecessor [Member]	Louisville Gas And Electric Co [Member] Earnings Reinvested Successor [Member]	Louisville Gas And Electric Co [Member] Earnings Reinvested Predecessor [Member]	Louisville Gas And Electric Co [Member] Accumulated Other Comprehensive Loss Successor [Member]	Louisville Gas And Electric Co [Member] Accumulated Other Comprehensive Loss Predecessor [Member]		Kentucky Utilities Co [Member]	Kentucky Utilities Co [Member] Successor [Member]	Kentucky Utilities Co [Member] Predecessor [Member]	Kentucky Utilities Co [Member] Common Stock Successor [Member]		Kentucky Utilities Co [Member] Common Stock Predecessor [Member]		Kentucky Utilities Co [Member] Additional Paid-in Capital Successor [Member]	Kentucky Utilities Co [Member] Additional Paid-in Capital Predecessor [Member]	Kentucky Utilities Co [Member] Earnings Reinvested Successor [Member]	Kentucky Utilities Co [Member] Earnings Reinvested Predecessor [Member]	Kentucky Utilities Co [Member] Accumulated Other Comprehensive Loss Successor [Member]		Kentucky Utilities Co [Member] Accumulated Other Comprehensive Loss Predecessor [Member]
Balance at beginning of period at Dec. 31, 2009																	$ 364																		$ 1,253			$ 424			$ 84		$ 755		$ (10)	[1]			$ 1,952			$ 308			$ 316		$ 1,328
Balance at beginning of period - shares at Dec. 31, 2009																	66,368	[2]																				21,294	[3]													37,818	[4]
Balance at beginning of period at Dec. 31, 2009	[1]																								2,224				2,192			32
Net income																									190				190						109								109						140								140
Cash dividends declared on common stock																																			(55)								(55)						(50)								(50)
Distributions to member																									(81)				(81)
Contributions from member
Other comprehensive income (loss)																									(10)				(10)						10										10				(2)											(2)
Noncontrolling interest - income (loss) from discontinued operations																									(43)				(11)			(32)
Balance at end of period at Oct. 31, 2010																																			1,317			424			84		809			[1]			2,040			308			316		1,418			(2)	[1]
Balance at end of period - shares at Oct. 31, 2010																																						21,294	[3]													37,818	[4]
Balance at end of period at Oct. 31, 2010																									2,280	[1]			2,280	[1]
Balance at beginning of period at Dec. 31, 2009															1,896		364		301	824	407
Balance at beginning of period at Dec. 31, 2009		5,815		4		2,280	3,749	(537)	[1]	319
Balance at beginning of period - shares at Dec. 31, 2009				377,183	[5]												66,368	[2]
Balance at beginning of period at Dec. 31, 2009											4,586	4,568	[1]	18
Common stock shares issued	[5],[6]			106,208
Common stock issued		2,491		1		2,490
Purchase Contracts	[7]	(176)				(176)
Stock-based compensation	[8]	8				8
Net income		959					938			21	862	861		1	135	[9]					135
Dividends, dividend equivalents, redemptions and distributions	[10]	(677)					(605)			(72)
Cash dividends declared on preferred securities															(17)						(17)
Cash dividends declared on common stock															(71)						(71)
Distributions to member											(4,693)	(4,692)		(1)
Contributions from member											3,625	3,625
Capital contributions from PPL															55					55
Redemption of preferred securities	[11]														(54)				(51)		(3)
Other comprehensive income (loss)		58						58			129	129
Balance at end of period at Dec. 31, 2010															1,944		364		250	879	451
Balance at end of period at Dec. 31, 2010		8,478		5		4,602	4,082	(479)	[1]	268
Balance at end of period - shares at Dec. 31, 2010				483,391	[5]												66,368	[2]
Balance at end of period at Dec. 31, 2010											4,509	4,491	[1]	18
Balance at beginning of period at Oct. 31, 2010
Effect of PPL acquisition																							213				213							385						1,194		(809)						616						2,032		(1,418)		2
Net income																							47				47							19								19						35								35
Distributions to member																							(100)				(100)
Contributions from member																							1,565				1,565
Other comprehensive income (loss)																							6				6
Balance at end of period at Dec. 31, 2010															1,944		364																	1,721		424				1,278		19						2,691		308				2,348		35
Balance at end of period at Dec. 31, 2010																							4,011	[1]			4,011	[1]
Balance at end of period - shares at Dec. 31, 2010																	66,368	[2]																		21,294	[3]													37,818	[4]
Balance at beginning of period at Dec. 31, 2010		8,478
Net income		405	[12]												56	[13]
Balance at end of period at Mar. 31, 2011
Balance at beginning of period at Dec. 31, 2010															1,944		364			879	451													1,721		424				1,278		19						2,691		308				2,348		35
Balance at beginning of period at Dec. 31, 2010		8,478		5		4,602	4,082	(479)	[1]	268
Balance at beginning of period at Dec. 31, 2010																							4,011	[1]			4,011	[1]
Balance at beginning of period - shares at Dec. 31, 2010				483,391	[5]												66,368	[2]																		21,294	[3]													37,818	[4]
Balance at beginning of period at Dec. 31, 2010											4,509	4,491	[1]	18
Common stock shares issued	[5],[6]			95,014
Common stock issued		2,345		1		2,344
Purchase Contracts	[7]	(143)				(143)
Stock-based compensation	[8]	10				10
Net income		1,512					1,495			17	769	768		1	189	[9]					189		265				265							124								124						178								178
Dividends, dividend equivalents, redemptions and distributions	[10]	(797)					(780)			(17)
Cash dividends declared on preferred securities															(16)						(16)
Cash dividends declared on common stock															(92)						(92)													(83)								(83)						(124)								(124)
Distributions to member											(317)	(316)		(1)									(533)				(533)
Distribution of membership interest in PPL Global	[14]										(1,288)	(1,288)
Contributions from member											461	461
Capital contributions from PPL															100					100
Other comprehensive income (loss)		(309)						(309)			(97)	(97)											(2)				(2)
Balance at end of period at Dec. 31, 2011		10,828													2,125		364			979	532												1,762			424				1,278		60					2,745			308				2,348		89
Balance at end of period at Dec. 31, 2011		11,096		6		6,813	4,797	(788)	[1]	268
Balance at end of period at Dec. 31, 2011											4,019											3,741					3,741	[1]
Balance at end of period - shares at Dec. 31, 2011		578,405		578,405	[5]										66,368		66,368	[2]															21,294			21,294	[3]										37,818			37,818	[4]
Balance at end of period at Dec. 31, 2011											4,037	4,019	[1]	18
Balance at beginning of period at Sep. 30, 2011
Net income		458	[12]												61	[13]
Balance at end of period at Dec. 31, 2011																						3,741
Balance at end of period at Dec. 31, 2011		10,828													2,125		364																1,762														2,745
Balance at end of period at Dec. 31, 2011		11,096
Balance at end of period - shares at Dec. 31, 2011		578,405													66,368		66,368	[2]															21,294														37,818
Net income		545	[12]												37	[13]
Balance at end of period at Mar. 31, 2012
Balance at beginning of period at Dec. 31, 2011		10,828													2,125		364		250	979	532												1,762			424				1,278		60					2,745			308				2,348		89
Balance at beginning of period at Dec. 31, 2011		11,096		6		6,813	4,797	(788)	[1]	268
Balance at beginning of period at Dec. 31, 2011											4,019											3,741					3,741	[1]
Balance at beginning of period - shares at Dec. 31, 2011		578,405		578,405	[5]										66,368		66,368	[2]															21,294			21,294	[3]										37,818			37,818	[4]
Balance at beginning of period at Dec. 31, 2011											4,037	4,019	[1]	18
Common stock shares issued	[5],[6]			3,543
Common stock issued		99				99
Common stock shares repurchased	[5]			(4)
Purchase Contracts
Stock-based compensation	[8]	18				18
Net income		1,531					1,526			5	475	474		1	136	[9]					136		219				219							123								123						137								137
Dividends, dividend equivalents, redemptions and distributions	[10]	(1,094)				6	(845)			(255)
Cash dividends declared on preferred securities															(4)						(4)
Cash dividends declared on common stock															(95)						(95)													(75)								(75)						(100)								(100)
Distributions to member											(788)	(787)		(1)									(155)				(155)
Contributions from member											563	563
Capital contributions from PPL															150					150
Redemption of preferred securities	[11]														(250)				(250)	6	(6)
Other comprehensive income (loss)		(1,152)						(1,152)			(439)	(439)											(19)				(19)																					1										1
Balance at end of period at Dec. 31, 2012		10,480													2,062		364			1,135	563												1,810			424				1,278		108					2,783			308				2,348		126		1	[1]
Balance at end of period at Dec. 31, 2012		10,498		6		6,936	5,478	(1,940)	[1]	18
Balance at end of period at Dec. 31, 2012											3,830											3,786					3,786	[1]
Balance at end of period - shares at Dec. 31, 2012		581,944		581,944	[5]										66,368		66,368	[2]															21,294			21,294	[3]										37,818			37,818	[4]
Balance at end of period at Dec. 31, 2012											3,848	3,830	[1]	18
Balance at beginning of period at Sep. 30, 2012
Net income		360	[12]												37	[13]
Balance at end of period at Dec. 31, 2012																						3,786
Balance at end of period at Dec. 31, 2012		10,480													2,062		364																1,810														2,783
Balance at end of period at Dec. 31, 2012		$ 10,498
Balance at end of period - shares at Dec. 31, 2012		581,944													66,368		66,368	[2]															21,294														37,818

[1] See “General - Comprehensive Income” in Note 1 for disclosure of balances of each component of AOCI.

[2] Shares in thousands. All common shares of PPL Electric stock are owned by PPL.

[3] Shares in thousands. All common shares of LG&E stock are owned by LKE.

[4] Shares in thousands. All common shares of KU stock are owned by LKE.

[5] Shares in thousands. Each share entitles the holder to one vote on any question presented at any shareowners' meeting.

[6] 2011 includes the April issuance of 92 million shares of common stock, and 2010 includes the June issuance of 103.5 million shares of common stock. See Note 7 for additional information. All years presented include shares of common stock issued through various stock and incentive compensation plans.

[7] 2011 includes $123 million for the 2011 Purchase Contracts and $20 million of related fees and expenses, net of tax. 2010 includes $157 million for the 2010 Purchase Contracts and $19 million of related fees and expenses, net of tax. See Note 7 for additional information.

[8] 2012, 2011 and 2010 include $47 million, $33 million and $26 million of stock-based compensation expense related to new and existing unvested equity awards, and $(29) million, $(23) million and $(18) million related primarily to the reclassification from "Stock-based compensation" to "Common stock issued" for the issuance of common stock after applicable equity award vesting periods and tax adjustments related to stock-based compensation.

[9] Net income approximates comprehensive income.

[10] "Earnings reinvested" includes dividends and dividend equivalents on PPL common stock and restricted stock units. "Noncontrolling interests" includes dividends, redemptions and distributions to noncontrolling interests. In April 2010 and June 2012, collectively, PPL Electric redeemed all of its outstanding preferred securities. See Note 3 for additional information on both redemptions.

[11] In April 2010 and June 2012, collectively, PPL Electric redeemed all of its outstanding preferred securities. See Note 3 for additional information on both redemptions.

[12] Quarterly results can vary depending on, among other things, weather and the forward pricing of power. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

[13] PPL Electric's business is seasonal in nature, with peak sales periods generally occurring in the winter and summer months. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

[14] See Note 9 for additional information.