Defined Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 7	$ 36
Pension Plan [Member] | U.S.
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 13	$ 15	25	28
Interest cost	30	29	62	61
Expected return on plan assets	(63)	(66)	(127)	(127)
Amortization of: [Abstract]
Prior service cost	2	2	4	4
Actuarial loss	17	24	29	49
Net Periodic Defined Benefit Costs (Credits) Prior To Settlements	(1)	4	(7)	15
Settlements	12	0	12	0
Net periodic defined benefit costs (credits)	11	4	5	15
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	2	1	3	3
Interest cost	4	4	8	8
Expected return on plan assets	(6)	(7)	(12)	(12)
Amortization of: [Abstract]
Prior service cost	1	1	1	1
Actuarial loss	(2)	0	(2)
Net periodic defined benefit costs (credits)	$ (1)	$ (1)	(2)	0
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	2
Kentucky Utilities Co [Member]
Net Periodic Defined Benefit Costs Allocated to Subsidiary by Sponsor (Numeric) [Abstract]
Defined benefit plans - funding			$ 1	$ 1