Segment and Related Information (Details) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2023 USD ($)		Sep. 30, 2022 USD ($)		Sep. 30, 2023 USD ($) Integer		Sep. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Income Statement Data [Abstract]
Operating Revenues from external customers		$ 2,043		$ 2,134		$ 6,281		$ 5,612
Net income (loss)		230		174		627		566
Balance Sheet Data [Abstract]
Assets		38,629				38,629				$ 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		893		977		$ 2,631		2,864
Net income (loss)		175		164		432		465
Balance Sheet Data [Abstract]
Assets		16,867				16,867				16,904
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		737		766		2,295		2,217
Net income (loss)		136		143		384		410
Balance Sheet Data [Abstract]
Assets		14,069				14,069				13,565
Corporate and Other [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		0		7		0		19
Net income (loss)		(87)		(107)		(259)		(254)
Balance Sheet Data [Abstract]
Assets		1,300				1,300				1,287
Rhode Island Regulated
Income Statement Data [Abstract]
Operating Revenues from external customers		413		384		1,355		512
Net income (loss)		6		(26)		70		(55)
Balance Sheet Data [Abstract]
Assets		6,393				6,393				6,081
Segment (Numeric) [Abstract]
Goodwill									$ 725
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Operating Revenues from external customers		737		766		2,295		2,217
Net income (loss)	[1]	136		143		384		410
Balance Sheet Data [Abstract]
Assets		14,069				$ 14,069				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		398		436		$ 1,227		1,339
Net income (loss)		79	[2]	77	[2]	210	[2]	224
Balance Sheet Data [Abstract]
Assets		7,660				7,660				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		505		553		$ 1,439		1,569
Net income (loss)	[3]	101		$ 95		240		$ 268
Balance Sheet Data [Abstract]
Assets		9,635				9,635				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.