Defined Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 8	$ 41
Pension Plan [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 11	$ 14	36	42
Interest cost	33	30	95	91
Expected return on plan assets	(62)	(64)	(189)	(191)
Amortization of: [Abstract]
Prior service cost	2	2	6	6
Actuarial loss	11	21	40	70
Net Periodic Defined Benefit Costs (Credits) Prior To Settlements	(5)	3	(12)	18
Settlements	7	14	19	14
Net periodic defined benefit costs (credits)	2	17	7	32
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	2	4	5
Interest cost	3	4	11	12
Expected return on plan assets	(5)	(6)	(17)	(18)
Amortization of: [Abstract]
Prior service cost	0	0	1	1
Actuarial loss	0	(1)	(2)	(1)
Net periodic defined benefit costs (credits)	$ (1)	$ (1)	(3)	(1)
PPL Electric Utilities Corp [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			0	21
Louisville Gas And Electric Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			2	3
Kentucky Utilities Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 1	$ 1