Earnings Per Common Share - Computation of Basic and Diluted Earnings Per Common Share (Parenthetical) (Detail) - shares		12 Months Ended
	Nov. 30, 2023	May 31, 2024		May 31, 2023	[1]	May 31, 2022	[1]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive non-qualified stock options and restricted common share awards	0	0	[1]	0		0
Maximum
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive non-qualified stock options and restricted common share awards		100,000

[1] These non-qualified stock options and restricted common share awards were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive. There were no anti-dilutive non-qualified stock options and restricted common share awards prior to the Separation. The number of anti-dilutive non-qualified stock options and restricted common share awards for 2024 was less than 0.1 million.