Assets Acquired and Liabilities Assumed on Acquisition (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2023	May 31, 2022	May 31, 2021
Acquisitions
Goodwill		$ 1,293,588	$ 1,337,868	$ 1,345,754
2023 Acquisitions
Acquisitions
Current assets		17,508
Property, plant and equipment		3,605
Goodwill		25,407
Trade names - indefinite lives		3,168
Other intangible assets		14,965
Other long-term assets		1,647
Total Assets Acquired		66,300
Liabilities assumed		(12,287)
Net Assets Acquired	[1]	$ 54,013
Weighted-average other intangible asset amortization life (in years)		10 years
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	[2]		$ 129,226
Weighted-average other intangible asset amortization life (in years)			13 years

[1] Figure includes cash acquired of $6.5 million.

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