Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	$ 8,444	$ 8,290	$ 7,786
Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,842	2,998	2,960
Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	3,582	3,440	3,815
Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		1	23
Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,020	1,851	988
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	4,162	3,747	3,583
Residential [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,502	1,649	1,647
Residential [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,510	1,458	1,637
Residential [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		0	0
Residential [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,150	640	299
Residential [Member] | Rhode Island Regulated | Reclassification, Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	469
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,039	1,673	1,660
Commercial [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	418	444	491
Commercial [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,028	1,001	1,068
Commercial [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		0	0
Commercial [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	593	228	101
Commercial [Member] | Rhode Island Regulated | Reclassification, Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	372
Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	773	712	756
Industrial [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	47	55	85
Industrial [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	635	637	662
Industrial [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		0	0
Industrial [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	91	20	9
Industrial [Member] | Rhode Island Regulated | Reclassification, Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	88
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	390	1,120	878
Other [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	57	54	54
Other [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	323	272	323
Other [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		1	23
Other [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	10	793	478
Wholesale Municipal [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	23	22	28
Wholesale Municipal [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Wholesale Municipal [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	23	22	28
Wholesale Municipal [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		0	0
Wholesale Municipal [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Wholesale Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	63	50	97
Wholesale Other [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Wholesale Other [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	63	50	97
Wholesale Other [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		0	0
Wholesale Other [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	994	966	784
Transmission [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	818	796	683
Transmission [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
Transmission [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers		0	0
Transmission [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	176	170	101
PPL Electric Utilities Corp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,842	2,998	2,960
PPL Electric Utilities Corp [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,502	1,649	1,647
PPL Electric Utilities Corp [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	418	444	491
PPL Electric Utilities Corp [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	47	55	85
PPL Electric Utilities Corp [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	57	54	54
PPL Electric Utilities Corp [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
PPL Electric Utilities Corp [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
PPL Electric Utilities Corp [Member] | Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	818	796	683
Kentucky Utilities Co [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,976	1,875	2,075
Kentucky Utilities Co [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	756	707	802
Kentucky Utilities Co [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	510	484	517
Kentucky Utilities Co [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	447	448	463
Kentucky Utilities Co [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	176	168	182
Kentucky Utilities Co [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	23	22	28
Kentucky Utilities Co [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	64	46	83
Kentucky Utilities Co [Member] | Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
LOUISVILLE GAS And ELECTRIC CO [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,657	1,608	1,801
LOUISVILLE GAS And ELECTRIC CO [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	754	751	835
LOUISVILLE GAS And ELECTRIC CO [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	518	517	551
LOUISVILLE GAS And ELECTRIC CO [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	188	189	199
LOUISVILLE GAS And ELECTRIC CO [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	147	104	141
LOUISVILLE GAS And ELECTRIC CO [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	0	0	0
LOUISVILLE GAS And ELECTRIC CO [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	50	47	75
LOUISVILLE GAS And ELECTRIC CO [Member] | Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	$ 0	$ 0	$ 0