CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]		Additional Paid-in Capital [Member]	Earnings Reinvested [Member]	Earnings Reinvested [Member] Cumulative Effect, Period of Adoption, Adjustment	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]
Dividends Declared Per Share of Common Stock (in dollars per share)		$ 0.415
Balance at beginning of period - shares at Dec. 31, 2019				767,233,000	[1]							66,368,000	[2]							21,294,000	[3]					37,818,000	[4]
Balance at beginning of period at Dec. 31, 2019		$ 12,991		$ 8		$ 12,214	$ 5,127		$ (4,358)	$ 4,832		$ 364		$ 3,558	$ 910			$ 2,762		$ 424		$ 1,820	$ 518	$ 3,574		$ 308		$ 2,729	$ 537
Balance at beginning of period at Dec. 31, 2019																$ 4,942
Common stock shares issued	[1]			1,033,000
Common stock issued		34				34
Stock-based compensation		(9)				(9)
Net income (loss)		554					554			118	[5]				118	135	[6]	73	[7]				73	80	[8]				80
Capital contributions from parent																		25				25		37				37
Dividends and dividend equivalents	[9]	(319)					(319)
Dividends declared on common stock										(165)					(165)			(29)					(29)	(37)					(37)
Distributions to member																(52)
Other comprehensive income (loss)		(8)							(8)							1
Balance at end of period - shares at Mar. 31, 2020				768,266,000	[1]							66,368,000	[2]							21,294,000	[3]					37,818,000	[4]
Balance at end of period at Mar. 31, 2020		$ 13,241		$ 8		12,239	5,360		(4,366)	$ 4,785		$ 364		3,558	863			2,831		$ 424		1,845	562	3,654		$ 308		2,766	580
Balance at end of period at Mar. 31, 2020																5,026
Contributions from parent																		$ 25						$ 37
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (2)					$ (2)
Dividends Declared Per Share of Common Stock (in dollars per share)		$ 0.415
Balance at beginning of period - shares at Dec. 31, 2020		768,907,000		768,907,000	[1]					66,368,000		66,368,000	[2]					21,294,000		21,294,000	[3]			37,818,000		37,818,000	[4]
Balance at beginning of period at Dec. 31, 2020		$ 13,373		$ 8		12,270	5,315		(4,220)	$ 5,124		$ 364		3,753	1,007			$ 2,948		$ 424		1,923	601	$ 3,782		$ 308		2,857	617
Balance at beginning of period at Dec. 31, 2020																5,116
Common stock shares issued		0		520,000
Common stock issued		$ 16				16
Stock-based compensation		(13)				(13)
Net income (loss)		(1,840)					(1,840)			113	[5]				113	146	[6]	75	[7]				75	86	[8]				86
Dividends and dividend equivalents	[9]	(320)					(320)
Dividends declared on common stock										$ (115)					(115)			$ (60)					(60)	$ (56)					(56)
Distributions to member																(62)
Other comprehensive income (loss)		$ 338							338							3
Balance at end of period - shares at Mar. 31, 2021		769,427,000		769,427,000						66,368,000		66,368,000	[2]					21,294,000		21,294,000	[3]			37,818,000		37,818,000	[4]
Balance at end of period at Mar. 31, 2021		$ 11,554		$ 8		$ 12,273	$ 3,155		$ (3,882)	$ 5,122		$ 364		$ 3,753	$ 1,005			$ 2,963		$ 424		$ 1,923	$ 616	$ 3,812		$ 308		$ 2,857	$ 647
Balance at end of period at Mar. 31, 2021																$ 5,203
Contributions from parent																		$ 0						$ 0

[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] Net income equals comprehensive income.

[8] Net income equals comprehensive income.

[9] Dividends declared per share of common stock were $0.415 for the three months ended March 31, 2021 and March 31, 2020.