Computation of Earnings Per Share - Schedule of Basic and Diluted Earnings per Common Share (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Abstract]
Net earnings available to participating securities, Basic	$ 2	$ 2	$ 2	$ 3
Net earnings available to participating securities, Diluted	$ 2	$ 2	$ 2	$ 3