Defined Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 10	$ 14
Pension Plan [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 9	$ 8	26	25
Interest cost	45	47	137	141
Expected return on plan assets	(74)	(77)	(224)	(232)
Amortization of: [Abstract]
Prior service cost	1	2	2	5
Actuarial loss	3	1	8	2
Net periodic defined benefit costs (credits)	(16)	(19)	(51)	(59)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2	1	5	4
Interest cost	8	8	22	23
Expected return on plan assets	(8)	(7)	(23)	(22)
Amortization of: [Abstract]
Prior service cost	0	0	1	1
Actuarial loss	(1)	(1)	(4)	(4)
Net periodic defined benefit costs (credits)	$ 1	$ 1	1	2
PPL Electric Utilities Corp [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			2	5
Louisville Gas And Electric Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			1	1
Kentucky Utilities Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 1	$ 1