Summary of Activity in Restructuring Reserves (Detail) $ in Thousands	3 Months Ended
	Aug. 31, 2018 USD ($)
Restructuring Cost And Reserve [Line Items]
Additions charged to expense	$ 20,076
2020 MAP to Growth
Restructuring Cost And Reserve [Line Items]
Beginning balance	17,514
Additions charged to expense	20,076
Cash payments charged against reserve	(12,993)
Non-cash charges included above	(8,273)
Ending balance	16,324
Total Expected Costs	84,945
2020 MAP to Growth | Severance and Benefit Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	9,957
Additions charged to expense	19,062
Cash payments charged against reserve	(12,575)
Non-cash charges included above	(5,484)
Ending balance	10,960
Total Expected Costs	41,246
2020 MAP to Growth | Facility Closure and Other Related Costs
Restructuring Cost And Reserve [Line Items]
Beginning balance	6,184
Additions charged to expense	436
Cash payments charged against reserve	(418)
Non-cash charges included above	(838)
Ending balance	5,364
Total Expected Costs	40,703
2020 MAP to Growth | Other Asset Write-offs
Restructuring Cost And Reserve [Line Items]
Beginning balance	1,373
Additions charged to expense	578
Non-cash charges included above	(1,951)
Total Expected Costs	$ 2,996