Income Taxes - Earnings before Income Taxes (Detail) - USD ($) $ in Millions		12 Months Ended
		May 31, 2024	May 31, 2023	May 31, 2022
Income Tax Disclosure [Abstract]
U.S. based operations		$ 166.3	$ 102.7	$ 208.0
Non – U.S. based operations		49.9	26.0	46.3
Earnings before income taxes		216.2	128.7	254.3
Net earnings attributable to noncontrolling interests	[1]	15.4	12.6	19.9
Earnings before income taxes attributable to controlling interest		$ 200.8	$ 116.1	$ 234.4

[1] Net earnings attributable to noncontrolling interests are not taxable to the Company.