Defined Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 7	$ 7
Pension Plan [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 8	$ 8	17	17
Interest cost	46	48	92	94
Expected return on plan assets	(75)	(77)	(150)	(155)
Amortization of: [Abstract]
Prior service cost	0	1	1	3
Actuarial loss	3	1	5	1
Net periodic defined benefit costs (credits)	(18)	(19)	(35)	(40)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2	1	3	3
Interest cost	7	8	14	15
Expected return on plan assets	(8)	(7)	(15)	(15)
Amortization of: [Abstract]
Prior service cost	1	1	1	1
Actuarial loss	(2)	(2)	(3)	(3)
Net periodic defined benefit costs (credits)	$ 0	$ 1	0	1
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