Summary of Activity in Restructuring Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	$ 18,106	$ 33,108	$ 42,310
MAP to Growth
Restructuring Cost And Reserve [Line Items]
Beginning balance	13,237	12,694
Additions charged to expense	18,106	33,108	42,310
Cash payments charged against reserve	(21,016)	(26,277)
Non-cash charges and other adjustments	(4,607)	(6,288)
Ending balance	5,720	13,237	12,694
MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	7,357	4,837
Additions charged to expense	9,396	19,747	32,519
Cash payments charged against reserve	(12,413)	(17,038)
Non-cash charges and other adjustments	90	(189)
Ending balance	4,430	7,357	4,837
MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	5,880	7,857
Additions charged to expense	7,956	8,548	8,195
Cash payments charged against reserve	(8,268)	(9,239)
Non-cash charges and other adjustments	(4,278)	(1,286)
Ending balance	1,290	5,880	7,857
MAP to Growth | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	754	4,813	$ 1,596
Cash payments charged against reserve	(335)
Non-cash charges and other adjustments	$ (419)	$ (4,813)