Restructuring and Other Income, Net - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
	Oct. 31, 2022	Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and other expense, net		$ 0	$ (4,300,000)	$ 0	$ (4,200,000)
Restructuring liabilities		$ 0		$ 0
WSP Joint Venture
Restructuring Cost and Reserve [Line Items]
Net cash proceeds	$ 20,800,000
Pre-tax gain on sale of joint venture facility	$ 3,900,000