Segment and Related Information (Details) $ in Millions		3 Months Ended
		Mar. 31, 2023 USD ($) Integer	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 2,415	$ 1,782
Net income (loss)		285	273
Balance Sheet Data [Abstract]
Assets		38,302		$ 37,837
Segment (Numeric) [Abstract]
Goodwill		$ 2,248		2,248
Number of Reportable Segments | Integer		3
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 960	1,004
Net income (loss)		166	189
Balance Sheet Data [Abstract]
Assets		16,738		16,904
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		891	775
Net income (loss)		138	143
Balance Sheet Data [Abstract]
Assets		13,921		13,565
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		(1)	3
Net income (loss)		(73)	(59)
Balance Sheet Data [Abstract]
Assets		1,390		1,287
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		565	0
Net income (loss)		54	0
Balance Sheet Data [Abstract]
Assets		6,253		6,081
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		891	775
Net income (loss)	[1]	138	143
Balance Sheet Data [Abstract]
Assets		$ 13,921		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		$ 474	493
Net income (loss)	[2]	86	93
Balance Sheet Data [Abstract]
Assets		7,645		7,810
Segment (Numeric) [Abstract]
Goodwill		$ 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		$ 499	525
Net income (loss)	[3]	88	$ 107
Balance Sheet Data [Abstract]
Assets		9,552		9,542
Segment (Numeric) [Abstract]
Goodwill		$ 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.