Defined Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding	$ 5	$ 3
Pension Plan [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	9
Interest cost	46	46
Expected return on plan assets	(75)	(78)
Amortization of: [Abstract]
Prior service cost	1	2
Actuarial loss	2	0
Net periodic defined benefit costs (credits)	(17)	(21)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	2
Interest cost	7	7
Expected return on plan assets	(7)	(8)
Amortization of: [Abstract]
Actuarial loss	(1)	(1)
Net periodic defined benefit costs (credits)	0	0
PPL Electric Utilities Corp [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding	1	1
Louisville Gas And Electric Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding	1	0
Kentucky Utilities Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding	$ 1	$ 0