Asset Retirement Obligations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	$ 189
Accretion	2
New Obligation s Incurred	1
Changes in estimated timing or cost	2
Obligations settled	(23)
Balance at End of Period	181
Acquisition of RIE	10
Louisville Gas And Electric Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	84
Accretion	2
New Obligation s Incurred	1
Changes in estimated timing or cost	1
Obligations settled	(9)
Balance at End of Period	79
Acquisition of RIE	0
Kentucky Utilities Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	105
Accretion	0
New Obligation s Incurred	0
Changes in estimated timing or cost	1
Obligations settled	(14)
Balance at End of Period	92
Acquisition of RIE	$ 0