Asset Retirement Obligations (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	$ 189
Accretion	4
New Obligation s Incurred	2
Changes in estimated timing or cost	10
Obligations settled	(35)
Balance at End of Period	180
Acquisition of RIE	10
Louisville Gas And Electric Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	84
Accretion	3
New Obligation s Incurred	2
Changes in estimated timing or cost	9
Obligations settled	(12)
Balance at End of Period	86
Acquisition of RIE	0
Kentucky Utilities Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	105
Accretion	1
New Obligation s Incurred	0
Changes in estimated timing or cost	1
Obligations settled	(23)
Balance at End of Period	84
Acquisition of RIE	$ 0