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Treasury Stock (Details) - Schedule of repurchase of common stock - USD ($)
$ in Millions
3 Months Ended 13 Months Ended
Aug. 31, 2016
Aug. 31, 2016
Jul. 22, 2015
Stockholders' Equity Attributable to Parent [Abstract]      
Additional authorization July 2015     $ 50.0
Less repurchases made under the authorizations as of August 31, 2016 $ 0.0 $ (4.5)  
Remaining Board authorization at August 31, 2016 $ 45.5 $ 45.5