Summary of Trade Accounts Receivable Net of Allowances and Net Contract Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2021	Nov. 30, 2021	Aug. 31, 2021	May 31, 2021
Disaggregation Of Revenue [Line Items]
Trade accounts receivable, less allowances	$ 1,173,494	$ 1,173,494	$ 1,171,914	$ 1,280,806
Contract assets	47,615	47,615	45,310	33,217
Contract liabilities - short-term	(36,279)	(36,279)	(35,155)	(33,112)
Net Contract Assets	11,336	11,336	$ 10,155	$ 105
Change in Contract with Customer, Asset and Liability [Abstract]
Change in trade accounts receivable, less allowance	1,580	(107,312)
Change in contract assets	2,305	14,398
Increase in net contract assets	$ 1,181	$ 11,231
Percentage of change in trade accounts receivable, less allowance	0.10%	(8.40%)
Percentage of change in contract assets	5.10%	43.30%
Percentage of change in Net Contract Assets/(Liabilities)	11.60%
Short-term
Change in Contract with Customer, Asset and Liability [Abstract]
Change in contract liabilities	$ (1,124)	$ (3,167)
Percentage of change in contract liabilities	3.20%	9.60%