Defined Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 14	$ 8
Pension Plan [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 8	$ 11	25	36
Interest cost	47	33	141	95
Expected return on plan assets	(77)	(62)	(232)	(189)
Amortization of: [Abstract]
Prior service cost	2	2	5	6
Actuarial loss	1	11	2	40
Net Periodic Defined Benefit Costs (Credits) Prior To Settlements	(19)	(5)	(59)	(12)
Settlements	0	7	0	19
Net periodic defined benefit costs (credits)	(19)	2	(59)	7
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	4	4
Interest cost	8	3	23	11
Expected return on plan assets	(7)	(5)	(22)	(17)
Amortization of: [Abstract]
Prior service cost	0	0	1	1
Actuarial loss	(1)	0	(4)	(2)
Net periodic defined benefit costs (credits)	$ 1	$ (1)	2	(3)
PPL Electric Utilities Corp [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			5	0
Louisville Gas And Electric Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			1	2
Kentucky Utilities Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 1	$ 1