Asset Retirement Obligations (Details) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	$ 177
Accretion	6
New Obligation s Incurred	2
Changes in estimated timing or cost	14
Obligations settled	(26)
Asset Retirement Obligations, Period Change, Miscellaneous	(5)
Balance at End of Period	168
Louisville Gas And Electric Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	86
Accretion	3
New Obligation s Incurred	1
Changes in estimated timing or cost	11
Obligations settled	(9)
Asset Retirement Obligations, Period Change, Miscellaneous	(6)
Balance at End of Period	86
Kentucky Utilities Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	82
Accretion	3
New Obligation s Incurred	1
Changes in estimated timing or cost	5
Obligations settled	(17)
Asset Retirement Obligations, Period Change, Miscellaneous	0
Balance at End of Period	$ 74