Change in Accounting Principle - Additional Information (Detail) $ in Millions	3 Months Ended
Aug. 31, 2018 USD ($)
Cost of Sales
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Effect of change in accounting principle	$ 44.7
Selling, General and Administrative Expenses
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Effect of change in accounting principle	$ (44.7)

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

No definition available.

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration