Commitments and Contingencies - Environmental Matters and Other (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) employee	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Other - Labor Union Agreements (Numeric) [Abstract]
Amortization of excess deferred income taxes	$ (13)	$ (7)	$ (33)	$ (47)
Period RIE Environmental Remediation Costs To Be Incurred Over	30 years		30 years
RIE Environmental Remediation
Other - Labor Union Agreements (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies, Gross	$ 100		$ 100		$ 100
PPL Electric [Member] | PPL Electric Additional Sites [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies, Gross	11		$ 11		11
LGE [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Collective Bargaining Agreement Term			3 years
Concentration Risk Number Of Union Employees | employee			600
PPL Electric Utilities Corp [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Amortization of excess deferred income taxes	(4)	(4)	$ (8)	(9)
PPL Electric Utilities Corp [Member] | PPL Electric Additional Sites [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Accrual for Environmental Loss Contingencies, Gross	11		$ 11		$ 11
Louisville Gas And Electric Co [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Collective Bargaining Agreement Term			3 years
Concentration Risk Number Of Union Employees | employee			600
Amortization of excess deferred income taxes	(3)	(3)	$ (9)	(17)
Kentucky Utilities Co [Member]
Other - Labor Union Agreements (Numeric) [Abstract]
Amortization of excess deferred income taxes	$ (5)	$ (4)	$ (13)	$ (16)