CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Millions		Total	Common Stock [Member]		Additional Paid-in Capital [Member]	Earnings Reinvested [Member]	Accumulated Other Comprehensive Loss [Member]	PPL Electric Utilities Corp [Member]		PPL Electric Utilities Corp [Member] Common Stock [Member]		PPL Electric Utilities Corp [Member] Additional Paid-in Capital [Member]		PPL Electric Utilities Corp [Member] Earnings Reinvested [Member]	LG And E And KU Energy LLC [Member]	Louisville Gas And Electric Co [Member]		Louisville Gas And Electric Co [Member] Common Stock [Member]		Louisville Gas And Electric Co [Member] Additional Paid-in Capital [Member]	Louisville Gas And Electric Co [Member] Earnings Reinvested [Member]	Kentucky Utilities Co [Member]		Kentucky Utilities Co [Member] Common Stock [Member]		Kentucky Utilities Co [Member] Additional Paid-in Capital [Member]	Kentucky Utilities Co [Member] Earnings Reinvested [Member]	Kentucky Utilities Co [Member] Accumulated Other Comprehensive Loss [Member]
Balance at beginning of period - shares at Dec. 31, 2014			665,849	[1]						66,368	[2]							21,294	[3]					37,818	[4]
Balance at beginning of period at Dec. 31, 2014		$ 13,628	$ 7		$ 9,433	$ 6,462	$ (2,274)	$ 2,717		$ 364		$ 1,603		$ 750		$ 2,174		$ 424		$ 1,521	$ 229	$ 3,206		$ 308		$ 2,596	$ 302	$ 0
Balance at beginning of period at Dec. 31, 2014															$ 4,248
Common stock shares issued	[1]		5,943
Common stock issued		183			183
Stock-based compensation		14			14
Net income		283				283		191	[5]					191	297	146	[5]				146	189	[6]				189
Contributions from member															55
Capital contributions from parent								322	[7]			322	[7]			20				20
Dividends and dividend equivalents		(754)				(754)
Distribution of PPL Energy Supply		(3,224)				(3,200)	(24)
Dividends declared on common stock								(140)						(140)		(81)					(81)	(106)					(106)
Distributions to member															(157)
Other comprehensive income (loss)		92					92								(6)							(1)						(1)
Balance at end of period - shares at Sep. 30, 2015			671,792	[1]						66,368	[2]							21,294	[3]					37,818	[4]
Balance at end of period at Sep. 30, 2015		$ 10,222	$ 7		9,630	2,791	(2,206)	$ 3,090		$ 364		1,925		801		$ 2,259		$ 424		1,541	294	$ 3,288		$ 308		2,596	385	(1)
Balance at end of period at Sep. 30, 2015															4,437
Balance at beginning of period - shares at Dec. 31, 2015		673,857	673,857	[1]				66,368		66,368	[2]					21,294		21,294	[3]			37,818		37,818	[4]
Balance at beginning of period at Dec. 31, 2015		$ 9,919	$ 7		9,687	2,953	(2,728)	$ 3,119		$ 364		1,934		821		$ 2,330		$ 424		1,611	295	$ 3,287		$ 308		2,596	383	0
Balance at beginning of period at Dec. 31, 2015															4,517
Common stock shares issued	[1]		5,411
Common stock issued		168			168
Stock-based compensation		(31)			(31)
Net income		1,437				1,437		263	[5]					263	337	159	[5]				159	207	[6]				207
Contributions from member															37
Capital contributions from parent								200				200				47				47		20				20
Dividends and dividend equivalents		(773)				(773)
Dividends declared on common stock								$ (193)						(193)		$ (87)					(87)	(197)					(197)
Distributions to member															(224)
Other comprehensive income (loss)		(752)					(752)								4							$ (1)						(1)
Adoption of stock-based compensation guidance cumulative effect adjustment		$ 7				7
Balance at end of period - shares at Sep. 30, 2016		679,268	679,268	[1]				66,368		66,368	[2]					21,294		21,294	[3]			37,818		37,818	[4]
Balance at end of period at Sep. 30, 2016		$ 9,975	$ 7		$ 9,824	$ 3,624	$ (3,480)	$ 3,389		$ 364		$ 2,134		$ 891		$ 2,449		$ 424		$ 1,658	$ 367	$ 3,316		$ 308		$ 2,616	$ 393	$ (1)
Balance at end of period at Sep. 30, 2016															$ 4,671

[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] Net income equals comprehensive income.

[6] Net income approximates comprehensive income.

[7] Includes non-cash contributions of $47 million.