Summary of Activity in Restructuring Reserves (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Nov. 30, 2018	Nov. 30, 2018
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	$ 7,724	$ 27,800
2020 MAP to Growth
Restructuring Cost And Reserve [Line Items]
Beginning balance	16,324	17,514
Additions charged to expense	7,724	27,800
Cash payments charged against reserve	(7,343)	(20,336)
Non-cash charges included above	(3,743)	(12,016)
Ending balance	12,962	12,962
2020 MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	10,960	9,957
Additions charged to expense	6,533	25,595
Cash payments charged against reserve	(6,013)	(18,588)
Non-cash charges included above	(1,053)	(6,537)
Ending balance	10,427	10,427
2020 MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	5,364	6,184
Additions charged to expense	1,037	1,473
Cash payments charged against reserve	(1,330)	(1,748)
Non-cash charges included above	(2,536)	(3,374)
Ending balance	2,535	2,535
2020 MAP to Growth | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Beginning balance		1,373
Additions charged to expense	154	732
Non-cash charges included above	$ (154)	$ (2,105)