Segment and Related Information (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Integer	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 1,696	$ 1,288	$ 3,478	$ 2,786
Net income (loss)		119	19	392	(1,821)
Balance Sheet Data [Abstract]
Assets		37,062		37,062		$ 33,223
Segment (Numeric) [Abstract]
Goodwill		2,297		$ 2,297		716
Number of Reportable Segments | Integer				3
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		883	741	$ 1,887	1,626
Net income (loss)		102	84	281	230
Balance Sheet Data [Abstract]
Assets		16,454		16,454		16,360
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		676	537	1,451	1,142
Net income (loss)		124	96	267	209
Balance Sheet Data [Abstract]
Assets		13,361		13,361		13,336
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		9	10	12	18
Net income (loss)		(78)	(716)	(127)	(772)
Balance Sheet Data [Abstract]
Assets		1,428		1,428		3,527
DiscontinuedOperationsSegment
Income Statement Data [Abstract]
Net income (loss)		0	555	0	(1,488)
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		128	0	128	0
Net income (loss)		(29)	0	(29)	0
Balance Sheet Data [Abstract]
Assets		5,819		5,819		0
Segment (Numeric) [Abstract]
Goodwill		725		725
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		676	537	1,451	1,142
Net income (loss)	[1]	124	96	267	209
Balance Sheet Data [Abstract]
Assets		13,361		$ 13,361		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		410	342	$ 903	770
Net income (loss)	[2]	54	45	147	120
Balance Sheet Data [Abstract]
Assets		7,563		7,563		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		491	411	$ 1,016	880
Net income (loss)	[3]	66	$ 56	173	$ 142
Balance Sheet Data [Abstract]
Assets		9,364		9,364		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.