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]	Treasury Stock, Common	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]	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)		$ 1.245
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)	$ 0	$ 4,832		$ 364		$ 3,558	$ 910	$ 2,762		$ 424		$ 1,820	$ 518	$ 3,574		$ 308		$ 2,729	$ 537
Common stock shares issued	[1]			1,564,000
Common stock issued		48				48
Stock-based compensation		(2)				(2)
Net income (loss)		1,179					1,179				370	[5]				370	191	[6]				191	217	[7]				217
Capital contributions from parent											740				740		53				53		98				98
Dividends and dividend equivalents	[8]	(959)					(959)
Dividends declared on common stock											(323)					(323)	(115)					(115)	(145)					(145)
Other comprehensive income (loss)		431							431
Balance at end of period - shares at Sep. 30, 2020				768,797,000	[1]								66,368,000	[2]					21,294,000	[3]					37,818,000	[4]
Balance at end of period at Sep. 30, 2020		$ 13,686		$ 8		12,260	5,345		(3,927)	0	4,874		$ 364		3,553	957	2,891		$ 424		1,873	594	3,744		$ 308		2,827	609
Contributions from parent											740						53						98
Return of Capital to Parent											(745)				(745)
Dividends Declared Per Share of Common Stock (in dollars per share)		$ 0.415
Balance at beginning of period - shares at Jun. 30, 2020				768,783,000									66,368,000	[2]					21,294,000	[3]					37,818,000	[4]
Balance at beginning of period at Jun. 30, 2020		$ 13,044		$ 8		12,255	5,383		(4,602)	0	4,817		$ 364		3,553	900	2,859		$ 424		1,873	562	3,655		$ 308		2,766	581
Common stock shares issued				14,000
Common stock issued		1				1
Stock-based compensation		4				4
Net income (loss)		281					281				134	[5]				134	71	[6]				71	84	[7]				84
Capital contributions from parent											485				485								61				61
Dividends and dividend equivalents		(319)					(319)
Dividends declared on common stock											(77)					(77)	(39)					(39)	(56)					(56)
Other comprehensive income (loss)		675							675
Balance at end of period - shares at Sep. 30, 2020				768,797,000	[1]								66,368,000	[2]					21,294,000	[3]					37,818,000	[4]
Balance at end of period at Sep. 30, 2020		$ 13,686		$ 8		12,260	5,345		(3,927)	0	4,874		$ 364		3,553	957	$ 2,891		$ 424		1,873	594	$ 3,744		$ 308		2,827	609
Return of Capital to Parent											$ (485)				(485)
Cumulative Effect of New Accounting Principle in Period of Adoption			$ (2)					$ (2)
Dividends Declared Per Share of Common Stock (in dollars per share)		$ 1.245
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)	0	$ 5,124		$ 364		3,753	1,007	$ 2,948		$ 424		1,923	601	$ 3,782		$ 308		2,857	617
Common stock shares issued		0		816,000
Common stock issued		$ 24				24
Treasury stock acquired		$ (282)								$ (282)
Treasury stock acquired		9,600,000								(9,614,000)
Stock-based compensation		$ (4)				(4)
Net income (loss)		(1,614)					(1,614)				335	[5]				335	202	[6]				202	241	[7]				241
Capital contributions from parent											1,075				1,075		44				44		60				60
Dividends and dividend equivalents	[8]	(958)					(958)
Dividends declared on common stock											$ (251)					(251)	$ (139)					(139)	$ (186)					(186)
Other comprehensive income (loss)		$ 4,037							4,037
Balance at end of period - shares at Sep. 30, 2021		760,109,000		760,109,000							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 Sep. 30, 2021		$ 14,576		$ 8		12,290	2,743		(183)	$ (282)	$ 5,783		$ 364		4,328	1,091	$ 3,055		$ 424		1,967	664	$ 3,897		$ 308		2,917	672
Contributions from parent											1,075						44						60
Return of Capital to Parent											(500)				(500)
Dividends Declared Per Share of Common Stock (in dollars per share)		$ 0.415
Balance at beginning of period - shares at Jun. 30, 2021				769,564,000									66,368,000	[2]					21,294,000	[3]					37,818,000	[4]
Balance at beginning of period at Jun. 30, 2021		$ 14,952		$ 8		12,281	2,854		(191)	0	5,882		$ 364		4,503	1,015	3,003		$ 424		1,967	612	3,873		$ 308		2,917	648
Common stock shares issued				159,000
Common stock issued		4				4
Treasury stock acquired		$ (282)								$ (282)
Treasury stock acquired		9,600,000								(9,614,000)
Stock-based compensation		$ 5				5
Net income (loss)		207					207				126	[5]				126	82	[6]				82	99	[7]				99
Capital contributions from parent											325				325
Dividends and dividend equivalents		(318)					(318)
Dividends declared on common stock											$ (50)					(50)	$ (30)					(30)	$ (75)					(75)
Other comprehensive income (loss)		$ 8							8
Balance at end of period - shares at Sep. 30, 2021		760,109,000		760,109,000							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 Sep. 30, 2021		$ 14,576		$ 8		$ 12,290	$ 2,743		$ (183)	$ (282)	$ 5,783		$ 364		4,328	$ 1,091	$ 3,055		$ 424		$ 1,967	$ 664	$ 3,897		$ 308		$ 2,917	$ 672
Return of Capital to Parent											$ (500)				$ (500)

[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.

[8] Dividends declared per share of common stock were $0.415 and $1.245 for the three and nine months ended September 30, 2021 and September 30, 2020.