Financing Activities - Distributions and Capital Contributions (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 28, 2025	Nov. 30, 2023	Dec. 31, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Distributions [Line Items]
Current quarterly common stock dividend (in dollars per share)			$ 0.2575	$ 1.03	$ 0.960	$ 0.875
Annualized current quarterly common stock dividend (in dollars per share)		$ 1.03
Deferred Interest Payment				$ 0
Subsequent Event [Member]
Distributions [Line Items]
Current quarterly common stock dividend (in dollars per share)	$ 0.2725
Louisville Gas And Electric Co [Member]
Distributions [Line Items]
Restricted net assets at end of period			$ 1,500	1,500
Unrestricted assets at the end of period			1,800	$ 1,800
Minimum adjusted equity to total capitalization in order to pay dividends				30.00%
Kentucky Utilities Co [Member]
Distributions [Line Items]
Restricted net assets at end of period			2,000	$ 2,000
Unrestricted assets at the end of period			$ 2,300	$ 2,300
Minimum adjusted equity to total capitalization in order to pay dividends				30.00%