Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	$ 2,239	$ 2,066	$ 6,768	$ 6,251
Alternative Revenue Programs	6	17	75	21
Other Revenue	(8)	(6)	(20)	(18)
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(2,237)	(2,077)	(6,823)	(6,254)
Contract with Customer, Asset and Liability [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)	30	28	72	72
Energy purchases	422	338	1,369	1,133
Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(1,055)	(857)	(3,327)	(2,752)
Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(555)	(417)	(1,652)	(1,280)
Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(201)	(178)	(577)	(530)
Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(98)	(342)	(319)	(885)
Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(7)	(7)	(19)	(18)
Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(26)	(20)	(88)	(48)
Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(295)	(256)	(841)	(741)
Pennsylvania Regulated [Member]
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	786	716	2,298	2,159
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(782)	(709)	(2,294)	(2,133)
Contract with Customer, Asset and Liability [Abstract]
Energy purchases	224	177	622	544
Pennsylvania Regulated [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(403)	(367)	(1,205)	(1,125)
Pennsylvania Regulated [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(119)	(111)	(331)	(318)
Pennsylvania Regulated [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(16)	(12)	(42)	(34)
Pennsylvania Regulated [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(15)	(15)	(41)	(43)
Pennsylvania Regulated [Member] | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	0
Pennsylvania Regulated [Member] | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	0
Pennsylvania Regulated [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(229)	(204)	(675)	(613)
Kentucky Regulated [Member]
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	944	895	2,841	2,698
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(941)	(910)	(2,836)	(1,400)
Contract with Customer, Asset and Liability [Abstract]
Energy purchases	23	25	149	124
Kentucky Regulated [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(394)	(378)	(1,209)	(480)
Kentucky Regulated [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(278)	(268)	(805)	(182)
Kentucky Regulated [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(162)	(161)	(474)	(17)
Kentucky Regulated [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(74)	(76)	(241)	(593)
Kentucky Regulated [Member] | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(7)	(7)	(19)	0
Kentucky Regulated [Member] | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(26)	(20)	(88)	0
Kentucky Regulated [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	(128)
Corporate and Other [Member]
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	0	0	0	1
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				(1)
Corporate and Other [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				0
Corporate and Other [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				0
Corporate and Other [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				0
Corporate and Other [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				(1)
Corporate and Other [Member] | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				0
Corporate and Other [Member] | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				0
Corporate and Other [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers				0
Rhode Island Regulated
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	509	455	1,629	1,393
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(514)	(458)	(1,693)	(2,720)
Contract with Customer, Asset and Liability [Abstract]
Energy purchases	173	135	598	464
Rhode Island Regulated | Net metering
Contract with Customer, Asset and Liability [Abstract]
Energy purchases	34	25	130	110
Rhode Island Regulated | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(258)	(112)	(913)	(1,147)
Rhode Island Regulated | Residential [Member] | Reclassification, Other
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(153)		(421)
Rhode Island Regulated | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(158)	(38)	(516)	(780)
Rhode Island Regulated | Commercial [Member] | Reclassification, Other
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(122)		(315)
Rhode Island Regulated | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(23)	(5)	(61)	(479)
Rhode Island Regulated | Industrial [Member] | Reclassification, Other
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(23)		(61)
Rhode Island Regulated | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(9)	(251)	(37)	(248)
Rhode Island Regulated | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	(18)
Rhode Island Regulated | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	(48)
Rhode Island Regulated | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(66)	(52)	(166)	0
PPL Electric Utilities Corp [Member]
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	786	716	2,298	2,159
Alternative Revenue Programs	0	(3)	9	(14)
Other Revenue	(4)	(4)	(13)	(12)
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(782)	(709)	(2,294)	(2,133)
Contract with Customer, Asset and Liability [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)	11	13	20	37
Energy purchases	224	177	622	544
PPL Electric Utilities Corp [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(403)	(367)	(1,205)	(1,125)
PPL Electric Utilities Corp [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(119)	(111)	(331)	(318)
PPL Electric Utilities Corp [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(16)	(12)	(42)	(34)
PPL Electric Utilities Corp [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(15)	(15)	(41)	(43)
PPL Electric Utilities Corp [Member] | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	0
PPL Electric Utilities Corp [Member] | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	0
PPL Electric Utilities Corp [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(229)	(204)	(675)	(613)
Louisville Gas And Electric Co [Member]
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	427	397	1,310	1,239
Alternative Revenue Programs	(2)	11	(1)	15
Other Revenue	(1)	(1)	(3)	(3)
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(424)	(407)	(1,306)	(1,251)
Contract with Customer, Asset and Liability [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)	1	1	3	2
Energy purchases	17	19	128	105
Louisville Gas And Electric Co [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(195)	(190)	(601)	(571)
Louisville Gas And Electric Co [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(137)	(132)	(406)	(391)
Louisville Gas And Electric Co [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(49)	(48)	(143)	(141)
Louisville Gas And Electric Co [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(29)	(31)	(111)	(114)
Louisville Gas And Electric Co [Member] | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	0
Louisville Gas And Electric Co [Member] | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(14)	(6)	(45)	(34)
Louisville Gas And Electric Co [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	0	0	0	0
Kentucky Utilities Co [Member]
Reconciliation of Revenue from Contracts with Customers [Abstract]
Operating Revenues	530	509	1,566	1,498
Alternative Revenue Programs	2	7	3	13
Other Revenue	(1)	(1)	(3)	(3)
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(531)	(515)	(1,566)	(1,508)
Contract with Customer, Asset and Liability [Abstract]
Accounts Receivable, Credit Loss Expense (Reversal)	2	2	4	3
Energy purchases	6	7	20	19
Kentucky Utilities Co [Member] | Residential [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(199)	(188)	(608)	(576)
Kentucky Utilities Co [Member] | Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(141)	(136)	(399)	(389)
Kentucky Utilities Co [Member] | Industrial [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(113)	(113)	(331)	(338)
Kentucky Utilities Co [Member] | Other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(46)	(45)	(131)	(134)
Kentucky Utilities Co [Member] | Wholesale - municipal [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(7)	(7)	(19)	(18)
Kentucky Utilities Co [Member] | Wholesale - other [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	(25)	(26)	(78)	(53)
Kentucky Utilities Co [Member] | Transmission [Member]
Disaggregation of Revenue [Abstract]
Revenues from Contracts with Customers	$ 0	$ 0	$ 0	$ 0