CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (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] Members Equity [Member]		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] Preference Stock	PPL Electric Utilities Corp [Member] Additional Paid-in Capital	PPL Electric Utilities Corp [Member] Earnings Reinvested	LG And E And KU Energy LLC [Member]		Louisville Gas And Electric Co [Member]		Louisville Gas And Electric Co [Member] Common Stock		Louisville Gas And Electric Co [Member] Additional Paid-in Capital	Louisville Gas And Electric Co [Member] Earnings Reinvested	Kentucky Utilities Co [Member]		Kentucky Utilities Co [Member] Common Stock		Kentucky Utilities Co [Member] Additional Paid-in Capital	Kentucky Utilities Co [Member] Earnings Reinvested	Kentucky Utilities Co [Member] Accumulated Other Comprehensive Loss
Balance at beginning of period at Dec. 31, 2011														$ 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)		268
Balance at beginning of period at Dec. 31, 2011																					3,741
Balance at beginning of period - shares at Dec. 31, 2011			578,405	[1]												66,368	[2]								21,294	[3]					37,818	[4]
Balance at beginning of period at Dec. 31, 2011										4,037	4,019		18
Common stock shares issued	[1],[5]		1,115
Common stock issued	[5]	32			32
Stock-based compensation	[6]	17			17
Net income (loss)		545				541			4	309	309			37	[7]					37	53	[7]	25	[8]				25	38	[7]				38
Dividends, dividend equivalents and distributions	[9]	(213)				(209)			(4)
Cash dividends declared on preference stock														(4)						(4)
Cash dividends declared on common stock														(35)						(35)			(15)					(15)	(24)					(24)
Distributions to member										(557)	(557)										(25)
Contributions from member
Capital contributions from parent
Other comprehensive income (loss)		58					58			(58)	(58)										(4)								(4)						(4)
Balance at end of period at Mar. 31, 2012														2,123		364		250	979	530			1,772		424		1,278	70	2,755		308		2,348	103	(4)
Balance at end of period at Mar. 31, 2012		11,535	6		6,862	5,129	(730)		268
Balance at end of period at Mar. 31, 2012																					3,765
Balance at end of period - shares at Mar. 31, 2012			579,520	[1]												66,368	[2]								21,294	[3]					37,818	[4]
Balance at end of period at Mar. 31, 2012										3,731	3,713		18
Balance at beginning 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
Balance at beginning of period at Dec. 31, 2012		10,498	6		6,936	5,478	(1,940)	[10]	18
Balance at beginning of period at Dec. 31, 2012										3,830											3,786
Balance at beginning of period - shares at Dec. 31, 2012		581,944	581,944	[1]										66,368		66,368	[2]						21,294		21,294	[3]			37,818		37,818	[4]
Balance at beginning of period at Dec. 31, 2012										3,848	3,830	[10]	18
Common stock shares issued	[1],[5]		1,270
Common stock issued	[5]	37			37
Stock-based compensation	[6]	15			15
Net income (loss)		413				413				(38)	(38)			64	[7]					64	96	[7]	44	[8]				44	64	[7]				64
Dividends, dividend equivalents and distributions	[9]	(215)				(215)
Cash dividends declared on common stock														(25)						(25)			(19)					(19)	(13)					(13)
Distributions to member										(313)	(313)										(4)
Contributions from member																					75
Capital contributions from parent														60					60				25				25		50				50
Other comprehensive income (loss)		(206)					(206)			(3)	(3)										(1)
Balance at end of period at Mar. 31, 2013		10,524												2,161		364			1,195	602			1,860		424		1,303	133	2,884		308		2,398	177	1
Balance at end of period at Mar. 31, 2013		10,542	6		6,988	5,676	(2,146)	[10]	18
Balance at end of period at Mar. 31, 2013										3,476											3,952
Balance at end of period - shares at Mar. 31, 2013		583,214	583,214	[1]										66,368		66,368	[2]						21,294		21,294	[3]			37,818		37,818	[4]
Balance at end of period at Mar. 31, 2013										$ 3,494	$ 3,476	[10]	$ 18

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

[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] Each period includes shares of common stock issued through various stock and incentive compensation plans.

[6] The three months ended March 31, 2013 and 2012 include $28 million and $29 million of stock-based compensation expense related to new and existing unvested equity awards. These periods also include $(13) million and $(12) 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.

[7] Net income approximates comprehensive income.

[8] Net income equals comprehensive income.

[9] "Earnings reinvested" includes dividends and dividend equivalents on PPL Corporation common stock and restricted stock units. "Noncontrolling interests" includes dividends and distributions to noncontrolling interests.

[10] See Note 18 for disclosure of balances of each component of AOCI.