Summary of Trade Accounts Receivable Net of Allowances and Net Contract Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2021	May 31, 2021
Disaggregation Of Revenue [Line Items]
Trade accounts receivable, less allowances	$ 1,171,914	$ 1,280,806
Contract assets	45,310	33,217
Contract liabilities - short-term	(35,155)	(33,112)
Net Contract Assets	10,155	$ 105
Change in Contract with Customer, Asset and Liability [Abstract]
Change in trade accounts receivable, less allowance	(108,892)
Change in contract assets	12,093
Increase in net contract assets	$ 10,050
Percentage of change in trade accounts receivable, less allowance	(8.50%)
Percentage of change in contract assets	36.40%
Short-term
Change in Contract with Customer, Asset and Liability [Abstract]
Change in contract liabilities	$ (2,043)
Percentage of change in contract liabilities	6.20%