Valuation and Qualifying Accounts and Reserves (Schedule II) (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2021	May 31, 2020	May 31, 2019
Accrued Product Liability Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 10,458	$ 11,739	$ 12,900
Additions Charged to Selling, General and Administrative		14,173	5,356	12,696
(Deductions) Additions	[1]	(6,334)	(6,637)	(13,857)
Balance at End of Period		18,297	10,458	11,739
Accrued Environmental Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		1,970	1,147	1,144
Additions Charged to Selling, General and Administrative		1,045	1,168	875
(Deductions) Additions	[1]	(1,686)	(345)	(872)
Balance at End of Period		1,329	1,970	1,147
Accrued Product Liability Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		27,016	29,942	29,902
Additions Charged to Selling, General and Administrative		15,366	15,042	8,301
(Deductions) Additions	[1]	(15,768)	(17,968)	(8,261)
Balance at End of Period		26,614	27,016	29,942
Accrued Environmental Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		4,125	4,211	3,571
Additions Charged to Selling, General and Administrative		1,918	371	895
(Deductions) Additions		224	(457)	(255)
Balance at End of Period		6,267	4,125	4,211
Allowance For Credit Loss Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	[2]	$ 55,847	54,748	46,344
Additions Charged to Selling, General and Administrative	[2]		16,683	18,646
Acquisitions (Disposals) of Businesses and Reclassifications	[2]		(79)	(131)
(Deductions) Additions	[2],[3]		(15,505)	(10,111)
Balance at End of Period	[2]		$ 55,847	$ 54,748

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

[2] Beginning in fiscal 2021, we began presenting a rollforward of our Allowance for Credit Losses in Note Q, "Revenue."  See Note Q, “Revenue,” to the Consolidated Financial Statements for further details on fiscal 2021 activity.

[3] Uncollectible accounts written off, net of recoveries