Asset Retirement Obligations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	$ 157
Accretion	2
Changes in estimated timing or cost	(1)
Obligations settled	(4)
Balance at End of Period	154
Louisville Gas And Electric Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	84
Accretion	1
Changes in estimated timing or cost	0
Obligations settled	(1)
Balance at End of Period	84
Kentucky Utilities Co [Member]
Asset Retirement Obligation [Roll Forward]
Balance at Beginning of Period	64
Accretion	1
Changes in estimated timing or cost	(1)
Obligations settled	(3)
Balance at End of Period	$ 61