Segment and Related Information (Details) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2024 USD ($)		Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) Integer		Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 1,881		$ 1,823	$ 4,185		$ 4,238
Net income (loss)		190		112	497		397
Balance Sheet Data [Abstract]
Assets		39,839			39,839			$ 39,236
Segment (Numeric) [Abstract]
Goodwill		2,247			$ 2,247			2,247
Number of Reportable Segments | Integer					3
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		819		778	$ 1,803		1,738
Net income (loss)		134		91	324		257
Balance Sheet Data [Abstract]
Assets		17,251			17,251			17,029
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		673		667	1,443		1,558
Net income (loss)		150		110	299		248
Balance Sheet Data [Abstract]
Assets		15,229			15,229			14,294
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		0		1	1		0
Net income (loss)		(106)		(99)	(202)		(172)
Balance Sheet Data [Abstract]
Assets		676			676			1,398
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		389		377	938		942
Net income (loss)		12		10	76		64
Balance Sheet Data [Abstract]
Assets		6,683			6,683			6,515
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		673		667	1,443		1,558
Net income (loss)	[1]	150		110	299		248
Balance Sheet Data [Abstract]
Assets		15,229			$ 15,229			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		366		355	$ 842		829
Net income (loss)		62	[2]	45	155	[2]	131
Balance Sheet Data [Abstract]
Assets		7,845			7,845			7,753
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		464		435	$ 989		934
Net income (loss)	[3]	77		$ 51	185		$ 139
Balance Sheet Data [Abstract]
Assets		9,871			9,871			9,714
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.