Segment and Related Information (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) Integer	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 1,823	$ 1,696	$ 4,238	$ 3,478
Net income (loss)		112	119	397	392
Balance Sheet Data [Abstract]
Assets		38,296		38,296		$ 37,837
Segment (Numeric) [Abstract]
Goodwill		2,247		$ 2,247		2,248
Number of Reportable Segments | Integer				3
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		778	883	$ 1,738	1,887
Net income (loss)		91	112	257	301
Balance Sheet Data [Abstract]
Assets		16,794		16,794		16,904
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		667	676	1,558	1,451
Net income (loss)		110	124	248	267
Balance Sheet Data [Abstract]
Assets		13,929		13,929		13,565
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		1	9	0	12
Net income (loss)		(99)	(88)	(172)	(147)
Balance Sheet Data [Abstract]
Assets		1,356		1,356		1,287
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		377	128	942	128
Net income (loss)		10	(29)	64	(29)
Balance Sheet Data [Abstract]
Assets		6,217		6,217		6,081
Segment (Numeric) [Abstract]
Goodwill		725		725
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		667	676	1,558	1,451
Net income (loss)	[1]	110	124	248	267
Balance Sheet Data [Abstract]
Assets		13,929		$ 13,929		13,565
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		355	410	$ 829	903
Net income (loss)	[2]	45	54	131	147
Balance Sheet Data [Abstract]
Assets		7,619		7,619		7,810
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		435	491	$ 934	1,016
Net income (loss)	[3]	51	$ 66	139	$ 173
Balance Sheet Data [Abstract]
Assets		9,610		9,610		9,542
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.