Segment and Related Information (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Integer	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 2,134	$ 1,512	$ 5,612	$ 4,298
Net income (loss)		174	207	566	(1,614)
Balance Sheet Data [Abstract]
Assets		37,378		37,378		$ 33,223
Segment (Numeric) [Abstract]
Goodwill		2,241		$ 2,241		716
Number of Reportable Segments | Integer				3
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		977	879	$ 2,864	2,505
Net income (loss)		153	159	434	389
Balance Sheet Data [Abstract]
Assets		16,622		16,622		16,360
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		766	627	2,217	1,769
Net income (loss)		143	126	410	335
Balance Sheet Data [Abstract]
Assets		13,297		13,297		13,336
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		7	6	19	24
Net income (loss)		(96)	(76)	(223)	(848)
Balance Sheet Data [Abstract]
Assets		1,457		1,457		3,527
DiscontinuedOperationsSegment
Income Statement Data [Abstract]
Net income (loss)		0	(2)	0	(1,490)
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		384	0	512	0
Net income (loss)		(26)	0	(55)	0
Balance Sheet Data [Abstract]
Assets		6,002		6,002		0
Segment (Numeric) [Abstract]
Goodwill		725		725
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		766	627	2,217	1,769
Net income (loss)	[1]	143	126	410	335
Balance Sheet Data [Abstract]
Assets		13,297		$ 13,297		13,302
Segment (Numeric) [Abstract]
Number of Reportable Segments | Integer				1
Number of Operating Segments | Integer				2
Louisville Gas And Electric Co [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		436	395	$ 1,339	1,165
Net income (loss)	[2]	77	82	224	202
Balance Sheet Data [Abstract]
Assets		7,642		7,642		7,592
Segment (Numeric) [Abstract]
Goodwill		389		$ 389		389
Number of Reportable Segments | Integer				1
Number of Operating Segments | Integer				1
Kentucky Utilities Co [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		553	494	$ 1,569	1,374
Net income (loss)	[3]	95	$ 99	268	$ 241
Balance Sheet Data [Abstract]
Assets		9,424		9,424		9,272
Segment (Numeric) [Abstract]
Goodwill		$ 607		$ 607		$ 607
Number of Reportable Segments | Integer				1
Number of Operating Segments | Integer				1

[1] Net income equals comprehensive income.

[2] Net income equals comprehensive income.

[3] Net income equals comprehensive income.