Revenue from Contracts with Customers (Details) $ in Millions	7 Months Ended	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) Days	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 8,312	$ 7,902	$ 5,783
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		1	(92)	77
Other Revenue		(23)	(24)	(22)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		8,290	7,786	5,838
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		79	70	22
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	$ 34	43	34	42	$ 40
Contract with Customer, Liability, Revenue Recognized		$ 21	25	24
PPL Electric [Member]
Revenue from contracts with customers [Line Items]
Number Of Days Due From Invoice Date | Days		21
Contract with Customer, Asset and Liability [Abstract]
Amortization of Revenue Reserve for ROE Challenge		$ 74
KU [Member]
Revenue from contracts with customers [Line Items]
Number Of Days Due From Invoice Date | Days		22
LGE [Member]
Revenue from contracts with customers [Line Items]
Number Of Days Due From Invoice Date | Days		22
Rhode Island Energy
Revenue from contracts with customers [Line Items]
Operating Revenues	1,038
Contract with Customer, Asset and Liability [Abstract]
Accounts Receivable Forgiven, AR Reserve			23
Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		$ 3,747	3,583	2,715
Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,673	1,660	1,278
Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		712	756	639
Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,120	878	386
Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		22	28	24
Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		50	97	66
Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		966	784	730
Pennsylvania Regulated [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		3,008	3,030	2,402
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		2,998	2,960	2,482
Pennsylvania Regulated [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,649	1,647	1,299
Pennsylvania Regulated [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		444	491	350
Pennsylvania Regulated [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		55	85	53
Pennsylvania Regulated [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		54	54	50
Pennsylvania Regulated [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Pennsylvania Regulated [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Pennsylvania Regulated [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		796	683	730
Kentucky Regulated [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		3,452	3,811	3,348
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		3,440	3,815	3,325
Kentucky Regulated [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,458	1,637	1,416
Kentucky Regulated [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,001	1,068	928
Kentucky Regulated [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		637	662	586
Kentucky Regulated [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		272	323	305
Kentucky Regulated [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		22	28	24
Kentucky Regulated [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		50	97	66
Kentucky Regulated [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Corporate And Other [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		1	23	33
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1	23	31
Corporate And Other [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Corporate And Other [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Corporate And Other [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Corporate And Other [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1	23	31
Corporate And Other [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Corporate And Other [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Corporate And Other [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Rhode Island Regulated
Revenue from contracts with customers [Line Items]
Operating Revenues		1,851	1,038	0
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,851	988	0
Rhode Island Regulated | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		640	299	0
Rhode Island Regulated | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		228	101	0
Rhode Island Regulated | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		20	9	0
Rhode Island Regulated | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		793	478	0
Rhode Island Regulated | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Rhode Island Regulated | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Rhode Island Regulated | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		170	101	0
PPL Electric Utilities Corp [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 3,008	3,030	2,402
Number Of Days Due From Invoice Date | Days		21
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		$ 5	(56)	83
Other Revenue		(15)	(14)	(3)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		2,998	2,960	2,482
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		47	21	10
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	23	29	23	25	23
Contract with Customer, Liability, Revenue Recognized		10	12	11
Revenue Reserve for ROE Challenge			78
Amortization of Revenue Reserve for ROE Challenge		74
PPL Electric Utilities Corp [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,649	1,647	1,299
PPL Electric Utilities Corp [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		444	491	350
PPL Electric Utilities Corp [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		55	85	53
PPL Electric Utilities Corp [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		54	54	50
PPL Electric Utilities Corp [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
PPL Electric Utilities Corp [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
PPL Electric Utilities Corp [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		796	683	730
Louisville Gas And Electric Co [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 1,613	1,798	1,569
Number Of Days Due From Invoice Date | Days		22
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		$ (1)	9	(3)
Other Revenue		(4)	(6)	(8)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,608	1,801	1,558
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		4	6	4
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	5	6	5	6	5
Contract with Customer, Liability, Revenue Recognized		5	6	5
Louisville Gas And Electric Co [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		751	835	711
Louisville Gas And Electric Co [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		517	551	473
Louisville Gas And Electric Co [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		189	199	180
Louisville Gas And Electric Co [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		104	141	145
Louisville Gas And Electric Co [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Louisville Gas And Electric Co [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		47	75	49
Louisville Gas And Electric Co [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		0	0	0
Kentucky Utilities Co [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 1,884	2,074	1,826
Number Of Days Due From Invoice Date | Days		22
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		$ (5)	5	(3)
Other Revenue		(4)	(4)	(9)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,875	2,075	1,814
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		2	6	8
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	$ 6	7	6	6	$ 6
Contract with Customer, Liability, Revenue Recognized		6	6	6
Kentucky Utilities Co [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		707	802	705
Kentucky Utilities Co [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		484	517	455
Kentucky Utilities Co [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		448	463	406
Kentucky Utilities Co [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		168	182	160
Kentucky Utilities Co [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		22	28	24
Kentucky Utilities Co [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		46	83	64
Kentucky Utilities Co [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		$ 0	$ 0	$ 0