Revenue from Contracts with Customers (Details) $ in Millions	7 Months Ended	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) Days	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 7,902	$ 5,783	$ 5,474
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		(92)	77	(24)
Other Revenue		(24)	(22)	(21)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		7,786	5,838	5,429
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		70	22	25
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	$ 34	34	42	40	$ 37
Contract with Customer, Liability, Revenue Recognized		$ 25	24	22
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		3,583	2,715	2,585
Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,660	1,278	1,185
Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		756	639	582
Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		878	386	347
Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		28	24	20
Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		97	66	40
Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		784	730	670
Pennsylvania Regulated [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		3,030	2,402	2,330
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		2,960	2,482	2,316
Pennsylvania Regulated [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,647	1,299	1,238
Pennsylvania Regulated [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		491	350	314
Pennsylvania Regulated [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		85	53	44
Pennsylvania Regulated [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		54	50	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		683	730	670
Kentucky Regulated [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		3,811	3,348	3,106
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		3,815	3,325	3,077
Kentucky Regulated [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,637	1,416	1,347
Kentucky Regulated [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,068	928	871
Kentucky Regulated [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		662	586	538
Kentucky Regulated [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		323	305	261
Kentucky Regulated [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		28	24	20
Kentucky Regulated [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		97	66	40
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		23	33	38
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		23	31	36
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		23	31	36
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		1,038	0	0
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		988	0	0
Rhode Island Regulated | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		299	0	0
Rhode Island Regulated | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		101	0	0
Rhode Island Regulated | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		9	0	0
Rhode Island Regulated | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		478	0	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		101	0	0
PPL Electric Utilities Corp [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 3,030	2,402	2,331
Number Of Days Due From Invoice Date | Days		21
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		$ (56)	83	(12)
Other Revenue		(14)	(3)	(3)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		2,960	2,482	2,316
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		21	10	17
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	23	23	25	23	21
Contract with Customer, Liability, Revenue Recognized		12	11	9
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		1,647	1,299	1,238
PPL Electric Utilities Corp [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		491	350	314
PPL Electric Utilities Corp [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		85	53	44
PPL Electric Utilities Corp [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		54	50	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		683	730	670
Louisville Gas And Electric Co [Member]
Revenue from contracts with customers [Line Items]
Operating Revenues		$ 1,798	1,569	1,456
Number Of Days Due From Invoice Date | Days		22
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		$ 9	(3)	(8)
Other Revenue		(6)	(8)	(7)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		1,801	1,558	1,441
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		6	4	4
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	5	5	6	5	5
Contract with Customer, Liability, Revenue Recognized		6	5	5
Louisville Gas And Electric Co [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		835	711	676
Louisville Gas And Electric Co [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		551	473	444
Louisville Gas And Electric Co [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		199	180	173
Louisville Gas And Electric Co [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		141	145	114
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		75	49	34
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		$ 2,074	1,826	1,690
Number Of Days Due From Invoice Date | Days		22
Reconciliation of Revenue from Contracts with Customers [Abstract]
Alternative Revenue Programs		$ 5	(3)	(4)
Other Revenue		(4)	(9)	(10)
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		2,075	1,814	1,676
Credit loss from contract with customer [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)		6	8	4
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability	$ 6	6	6	6	$ 4
Contract with Customer, Liability, Revenue Recognized		6	6	4
Kentucky Utilities Co [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		802	705	671
Kentucky Utilities Co [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		517	455	427
Kentucky Utilities Co [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		463	406	365
Kentucky Utilities Co [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		182	160	147
Kentucky Utilities Co [Member] | Wholesale Municipal [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		28	24	20
Kentucky Utilities Co [Member] | Wholesale Other [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		83	64	46
Kentucky Utilities Co [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenue from Contracts with Customers		$ 0	$ 0	$ 0