Segment and Related Information (Details) $ in Millions		3 Months Ended
		Mar. 31, 2024 USD ($) Integer		Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 2,304		$ 2,415
Net income (loss)		307		285
Balance Sheet Data [Abstract]
Assets		39,631			$ 39,236
Segment (Numeric) [Abstract]
Goodwill		$ 2,247			2,247
Number of Reportable Segments | Integer		3
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 984		960
Net income (loss)		190		166
Balance Sheet Data [Abstract]
Assets		17,074			17,029
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		770		891
Net income (loss)		149		138
Balance Sheet Data [Abstract]
Assets		15,116			14,294
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		1		(1)
Net income (loss)		(96)		(73)
Balance Sheet Data [Abstract]
Assets		827			1,398
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		549		565
Net income (loss)		64		54
Balance Sheet Data [Abstract]
Assets		6,614			6,515
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		770		891
Net income (loss)	[1]	149		138
Balance Sheet Data [Abstract]
Assets		$ 15,116			14,294
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		$ 476		474
Net income (loss)		93	[2]	86
Balance Sheet Data [Abstract]
Assets		7,798			7,753
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		$ 525		499
Net income (loss)	[3]	108		$ 88
Balance Sheet Data [Abstract]
Assets		9,773			9,714
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.