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Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	$ 9,170	$ 8,444	$ 8,290
Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	3,117	2,842	2,998
Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	3,751	3,582	3,440
Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			1
Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,302	2,020	1,851
Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	4,521	4,162	3,747
Residential [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,656	1,502	1,649
Residential [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,616	1,510	1,458
Residential [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			0
Residential [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,249	1,150	640
Residential [Member] | Rhode Island Regulated | Reclassification, Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	534	469
Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,182	2,039	1,673
Commercial [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	448	418	444
Commercial [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,063	1,028	1,001
Commercial [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			0
Commercial [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	671	593	228
Commercial [Member] | Rhode Island Regulated | Reclassification, Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	409	372
Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	766	773	712
Industrial [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	56	47	55
Industrial [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	627	635	637
Industrial [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			0
Industrial [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	83	91	20
Industrial [Member] | Rhode Island Regulated | Reclassification, Other
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	83	88
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	449	390	1,120
Other [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	54	57	54
Other [Member] | Kentucky Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	309	323	272
Other [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			1
Other [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	86	10	793
Wholesale Municipal [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	25	23	22
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	25	23	22
Wholesale Municipal [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			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	111	63	50
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	111	63	50
Wholesale Other [Member] | Corporate And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers			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	1,116	994	966
Transmission [Member] | Pennsylvania Regulated [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	903	818	796
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
Transmission [Member] | Rhode Island Regulated
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	213	176	170
PPL Electric Utilities Corp [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	3,117	2,842	2,998
PPL Electric Utilities Corp [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	1,656	1,502	1,649
PPL Electric Utilities Corp [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	448	418	444
PPL Electric Utilities Corp [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	56	47	55
PPL Electric Utilities Corp [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	54	57	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	903	818	796
Kentucky Utilities Co [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	2,060	1,976	1,875
Kentucky Utilities Co [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	807	756	707
Kentucky Utilities Co [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	523	510	484
Kentucky Utilities Co [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	440	447	448
Kentucky Utilities Co [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	169	176	168
Kentucky Utilities Co [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	25	23	22
Kentucky Utilities Co [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	96	64	46
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	1,742	1,657	1,608
LOUISVILLE GAS And ELECTRIC CO [Member] | Residential [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	809	754	751
LOUISVILLE GAS And ELECTRIC CO [Member] | Commercial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	540	518	517
LOUISVILLE GAS And ELECTRIC CO [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	187	188	189
LOUISVILLE GAS And ELECTRIC CO [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	139	147	104
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	67	50	47
LOUISVILLE GAS And ELECTRIC CO [Member] | Transmission [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contracts with Customers	$ 0	$ 0	$ 0

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