Valuation and Qualifying Accounts and Reserves (Schedule II) (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2020	May 31, 2019	May 31, 2018
Allowance for Doubtful Accounts, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 54,748	$ 46,344	$ 44,138
Additions Charged to Selling, General and Administrative		16,683	18,646	4,487
Acquisitions (Disposals) of Businesses and Reclassifications		(79)	(131)
(Deductions) Additions	[1]	(15,505)	(10,111)	(2,281)
Balance at End of Period		55,847	54,748	46,344
Accrued Product Liability Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		11,739	12,900	14,932
Additions Charged to Selling, General and Administrative		5,356	12,696	6,169
(Deductions) Additions	[2]	(6,637)	(13,857)	(8,201)
Balance at End of Period		10,458	11,739	12,900
Accrued Environmental Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		1,147	1,144	1,102
Additions Charged to Selling, General and Administrative		1,168	875	413
(Deductions) Additions	[2]	(345)	(872)	(371)
Balance at End of Period		1,970	1,147	1,144
Accrued Product Liability Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		29,942	29,902	28,222
Additions Charged to Selling, General and Administrative		15,042	8,301	16,581
(Deductions) Additions	[2]	(17,968)	(8,261)	(14,901)
Balance at End of Period		27,016	29,942	29,902
Accrued Environmental Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		4,211	3,571	1,747
Additions Charged to Selling, General and Administrative		371	895	5,350	[3]
(Deductions) Additions		(457)	(255)	(3,526)
Balance at End of Period		$ 4,125	$ 4,211	$ 3,571

[1] Uncollectible accounts written off, net of recoveries

[2] Primarily claims paid during the year, net of insurance contributions

[3] Approximately $1.7 million of the additions are reflected in the line item entitled, “Restructuring Expense,” in our Consolidated Statements of Income.