Assets Acquired and Liabilities Assumed on Acquisition (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2022	May 31, 2021	May 31, 2020
Acquisitions
Goodwill		$ 1,337,868	$ 1,345,754	$ 1,250,066
2022 Acquisitions
Acquisitions
Current assets		9,604
Property, plant and equipment		71,658
Goodwill		30,747
Trade names - indefinite lives		1,050
Other intangible assets		21,010
Other long-term assets		2,316
Total Assets Acquired		136,385
Liabilities assumed		(7,159)
Net Assets Acquired	[1]	$ 129,226
Weighted-average other intangible asset amortization life (in years)		13 years
2021 Acquisitions
Acquisitions
Current assets			50,310
Property, plant and equipment			27,012
Goodwill			41,654
Trade names - indefinite lives			16,694
Other intangible assets			53,894
Other long-term assets			6,831
Total Assets Acquired			196,395
Liabilities assumed			(24,232)
Net Assets Acquired	[2]		$ 172,163
Weighted-average other intangible asset amortization life (in years)			20 years

[1] Figure includes cash acquired of $1.8 million.

[2] Figure includes cash acquired of $6.4 million.