CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Millions		Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock [Member]		Additional Paid-in Capital	Earnings Reinvested	Earnings Reinvested Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment	PPL Electric Utilities Corp [Member]		PPL Electric Utilities Corp [Member] Common Stock [Member]		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 [Member]		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 [Member]		Kentucky Utilities Co [Member] Additional Paid-in Capital	Kentucky Utilities Co [Member] Earnings Reinvested	Kentucky Utilities Co [Member] Accumulated Other Comprehensive Loss
Dividends Declared Per Share of Common Stock		$ 1.64
Balance at beginning of period - shares at Dec. 31, 2017				693,398	[1]								66,368	[2]						21,294	[3]					37,818	[4]
Balance at beginning of period at Dec. 31, 2017																	$ 4,563
Balance at beginning of period at Dec. 31, 2017		$ 10,761		$ 7		$ 10,305	$ 3,871		$ (3,422)		$ 3,992		$ 364		$ 2,729	$ 899		$ 2,527		$ 424		$ 1,712	$ 391	$ 3,357		$ 308		$ 2,616	$ 433	$ 0
Common stock shares issued	[1]			26,925
Common stock issued		718				718
Stock-based compensation		(2)				(2)
Net income		1,827					1,827				430	[5]				430	445	233	[6]				233	286	[7]				286
Capital contributions from parent											429				429			83				83		45				45
Dividends and dividend equivalents		(1,156)					(1,156)
Cash dividends declared on common stock											(390)					(390)		(156)					(156)	(246)					(246)
Distributions to member																	(302)
Other comprehensive income (loss)		(491)							(491)								17
Balance at end of period - shares at Dec. 31, 2018				720,323	[1]								66,368	[2]						21,294	[3]					37,818	[4]
Balance at end of period at Dec. 31, 2018																	4,723
Balance at end of period at Dec. 31, 2018		$ 11,657		$ 7		11,021	4,593		(3,964)		4,461		$ 364		3,158	939		2,687		$ 424		1,795	468	3,442		$ 308		2,661	473	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ 0					$ 51		$ (51)
Dividends Declared Per Share of Common Stock		$ 1.65
Common stock shares issued	[1]			46,910
Common stock issued		$ 1,185		$ 1		1,184
Stock-based compensation		9				9
Net income		1,746					1,746				457	[5]				457	468	232	[6]				232	293	[7]				293
Capital contributions from parent											400				400			25				25		68				68
Dividends and dividend equivalents		(1,212)					(1,212)
Cash dividends declared on common stock											$ (486)					(486)		$ (182)					(182)	$ (229)					(229)
Contributions from member																	63
Distributions to member																	(308)
Other comprehensive income (loss)		$ (394)							(394)								(4)
Balance at end of period - shares at Dec. 31, 2019		767,233		767,233	[1]						66,368		66,368	[2]				21,294		21,294	[3]			37,818		37,818	[4]
Balance at end of period at Dec. 31, 2019																	4,942
Balance at end 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	0
Dividends Declared Per Share of Common Stock		$ 1.66
Common stock shares issued	[1]			1,674
Common stock issued		$ 51				51
Stock-based compensation		5				5
Net income		1,469					1,469				497	[5]				497	450	244	[6]				244	280	[7]				280
Capital contributions from parent											940				940			103				103		128				128
Return of Capital to Parent											(745)				(745)
Dividends and dividend equivalents		(1,279)					(1,279)
Cash dividends declared on common stock											$ (400)					(400)		$ (161)					(161)	$ (200)					(200)
Distributions to member																	(283)
Other comprehensive income (loss)		$ 138							138								7
Balance at end of period - shares at Dec. 31, 2020		768,907		768,907	[1]						66,368		66,368	[2]				21,294		21,294	[3]			37,818		37,818	[4]
Balance at end of period at Dec. 31, 2020																	$ 5,116
Balance at end 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	$ 0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ (2)					$ (2)

[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 equals comprehensive income.

[7] Net income equals comprehensive income.