Segment and Related Information (Details) $ in Millions		3 Months Ended
		Mar. 31, 2025 USD ($) Integer		Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Income Statement Data [Abstract]
Revenues		$ 2,504		$ 2,304
Fuel		234		209
Energy purchases		559		520
Depreciation		322		316
Taxes, other than income		113		88
Other Income (Expense) - net		(28)		(22)
Interest Expense		190		179
Income Taxes		102		81
Net income (loss)		414		307
Balance Sheet Data [Abstract]
Total Assets		41,809			$ 41,069
Segment (Numeric) [Abstract]
Goodwill		$ 2,247			2,247
Number of Reportable Segments | Integer		3
Segment, Expenditure, Addition to Long-Lived Assets		$ 793		596
Amortization		20		24
Deferred income taxes and investment tax credits		38		72
Total Segments
Income Statement Data [Abstract]
Revenues		2,504		2,303
Fuel		234		209
Energy purchases		560		520
Utilities Operating Expense, Maintenance and Operations		562		539
Depreciation		320		316
Taxes, other than income		113		88
Other Income (Expense) - net		(26)		(19)
Interest Expense		143		146
Income Taxes		125		111
Net income (loss)		477		403
Segment (Numeric) [Abstract]
Segment, Expenditure, Addition to Long-Lived Assets		790		595
Amortization		16		20
Deferred income taxes and investment tax credits		21		54
Total Segments | Related Party
Segment (Numeric) [Abstract]
Interest Income from affiliate		(4)		(10)
Rhode Island Regulated
Income Statement Data [Abstract]
Revenues		626		549
Fuel		0		0
Energy purchases		235		229
Utilities Operating Expense, Maintenance and Operations		200		156
Depreciation		42		41
Taxes, other than income		47		27
Other Income (Expense) - net		(7)		(7)
Interest Expense		23		24
Income Taxes		18		15
Net income (loss)		70		64
Balance Sheet Data [Abstract]
Total Assets		7,194			7,055
Segment (Numeric) [Abstract]
Segment, Expenditure, Addition to Long-Lived Assets		172		125
Amortization		0		0
Deferred income taxes and investment tax credits		(7)		18
Rhode Island Regulated | Related Party
Segment (Numeric) [Abstract]
Interest Income from affiliate		(2)		0
Pennsylvania Regulated [Member]
Income Statement Data [Abstract]
Revenues		819		770
Fuel		0		0
Energy purchases		229		214
Utilities Operating Expense, Maintenance and Operations		162		181
Depreciation		102		99
Taxes, other than income		41		36
Other Income (Expense) - net		(11)		(9)
Interest Expense		60		62
Income Taxes		54		48
Net income (loss)		184		149
Balance Sheet Data [Abstract]
Total Assets		15,654			15,475
Segment (Numeric) [Abstract]
Segment, Expenditure, Addition to Long-Lived Assets		328		229
Amortization		11		12
Deferred income taxes and investment tax credits		20		32
Pennsylvania Regulated [Member] | Related Party
Segment (Numeric) [Abstract]
Interest Income from affiliate		(2)		(10)
Kentucky Regulated [Member]
Income Statement Data [Abstract]
Revenues		1,059		984
Fuel		234		209
Energy purchases		96		77
Utilities Operating Expense, Maintenance and Operations		200		202
Depreciation		176		176
Taxes, other than income		25		25
Other Income (Expense) - net		(8)		(3)
Interest Expense		60		60
Income Taxes		53		48
Net income (loss)		223		190
Balance Sheet Data [Abstract]
Total Assets		17,789			17,626
Segment (Numeric) [Abstract]
Segment, Expenditure, Addition to Long-Lived Assets		290		241
Amortization		5		8
Deferred income taxes and investment tax credits		8		4
Kentucky Regulated [Member] | Related Party
Segment (Numeric) [Abstract]
Interest Income from affiliate		0		0
Corporate and Other [Member]
Income Statement Data [Abstract]
Revenues		0		1
Income Taxes		(23)		(30)
Net income (loss)		(63)		(96)
Balance Sheet Data [Abstract]
Total Assets		1,172			913
Segment (Numeric) [Abstract]
Segment, Expenditure, Addition to Long-Lived Assets		3		1
Amortization		4		4
Deferred income taxes and investment tax credits		17		18
PPL Electric Utilities Corp [Member]
Income Statement Data [Abstract]
Revenues		819		770
Energy purchases		229		214
Depreciation		102		99
Taxes, other than income		41		36
Other Income (Expense) - net		(11)		(9)
Interest Expense		60		62
Income Taxes		54		48
Net income (loss)	[1]	184		149
Balance Sheet Data [Abstract]
Total Assets		$ 15,654			15,475
Segment (Numeric) [Abstract]
Number of Reportable Segments | Integer		1
Number of Operating Segments | Integer		2
Amortization		$ 11		12
Deferred income taxes and investment tax credits		20		32
PPL Electric Utilities Corp [Member] | Related Party
Segment (Numeric) [Abstract]
Interest Income from affiliate		(2)		(10)
Louisville Gas And Electric Co [Member]
Income Statement Data [Abstract]
Revenues		505		476
Fuel		82		86
Energy purchases		88		71
Depreciation		74		76
Taxes, other than income		13		13
Other Income (Expense) - net		(3)		(2)
Interest Expense		26		26
Income Taxes		26		24
Net income (loss)		105	[2]	93
Balance Sheet Data [Abstract]
Total Assets		8,081			7,992
Segment (Numeric) [Abstract]
Goodwill		$ 389			389
Number of Reportable Segments | Integer		1
Number of Operating Segments | Integer		1
Amortization		$ 4		3
Deferred income taxes and investment tax credits		1		2
Kentucky Utilities Co [Member]
Income Statement Data [Abstract]
Revenues		564		525
Fuel		152		123
Energy purchases		7		6
Depreciation		102		99
Taxes, other than income		12		12
Other Income (Expense) - net		(5)		(2)
Interest Expense		35		34
Income Taxes		31		27
Net income (loss)	[3]	125		108
Balance Sheet Data [Abstract]
Total Assets		10,161			10,073
Segment (Numeric) [Abstract]
Goodwill		$ 607			$ 607
Number of Reportable Segments | Integer		1
Number of Operating Segments | Integer		1
Amortization		$ 4		5
Deferred income taxes and investment tax credits		$ 3		$ (1)

[1] Net income equals comprehensive income.

[2] Net income equals comprehensive income.

[3] Net income equals comprehensive income.