Summary of Activity in Restructuring Reserves (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	$ 7,343	$ 8,679	$ 18,766	$ 36,479
2020 MAP to Growth
Restructuring Cost And Reserve [Line Items]
Beginning balance	9,646	12,962	12,694	17,514
Additions charged to expense	7,343	8,679	18,766	36,479
Cash payments charged against reserve	(5,760)	(6,847)	(18,896)	(27,183)
Non-cash charges included above	(523)	(928)	(1,858)	(12,944)
Ending balance	10,706	13,866	10,706	13,866
2020 MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	3,566	10,427	4,837	9,957
Additions charged to expense	4,816	3,420	11,331	29,015
Cash payments charged against reserve	(3,182)	(4,975)	(10,968)	(23,563)
Non-cash charges included above	(161)		(161)	(6,537)
Ending balance	5,039	8,872	5,039	8,872
2020 MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	6,080	2,535	7,857	6,184
Additions charged to expense	2,165	4,337	6,758	5,810
Cash payments charged against reserve	(2,578)	(1,872)	(7,928)	(3,620)
Non-cash charges included above		(6)	(1,020)	(3,380)
Ending balance	5,667	4,994	5,667	4,994
2020 MAP to Growth | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Beginning balance				1,373
Additions charged to expense	362	922	677	1,654
Non-cash charges included above	$ (362)	$ (922)	$ (677)	$ (3,027)