Restructuring and Other Expense, Net - Schedule of Progression of Liabilities Associated with Restructuring Activities, Combined with Reconciliation to Restructuring and Other Expense (Income), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Restructuring Cost and Reserve [Line Items]
Beginning Balance			$ 6,692
Expense (income)			3,102
Payments			(8,341)
Adjustments			(25)
Ending Balance	$ 1,428		1,428
Net (gain) loss on sale of assets			34,554
Restructuring and other expense (income), net	28,212	$ 1,376	37,656	$ 1,781
Early Retirement And Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance			6,536
Expense (income)			1,983
Payments			(7,042)
Adjustments			(99)
Ending Balance	1,378		1,378
Facility Exit And Other Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance			156
Expense (income)			1,119
Payments			(1,299)
Adjustments			74
Ending Balance	$ 50		$ 50