Valuation and Qualifying Accounts and Reserves (Schedule II) (Parenthetical) (Detail) $ in Thousands	12 Months Ended
May 31, 2018 USD ($)
Valuation and Qualifying Accounts Disclosure [Line Items]
Restructuring Expense	$ 17,514
Environmental Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Restructuring Expense	$ 1,700

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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