Commitments and Contingencies (Details) $ in Millions	May 31, 2017 USD ($)
Fiscal years 2009 through 2011 [Member]
Loss Contingencies [Line Items]
Potential additional income tax payment due	$ 28.6
Fiscal Years 2012 Through 2014 [Member]
Loss Contingencies [Line Items]
Potential additional income tax payment due	$ 5.3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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