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Debt (Details) - Schedule of debt - USD ($)
$ in Millions
Aug. 31, 2016
May 31, 2016
Aug. 31, 2015
Debt (Details) - Schedule of debt [Line Items]      
Short-term debt $ 12.1    
Total Debt 12.1 $ 6.3 $ 5.7
Line of Credit      
Debt (Details) - Schedule of debt [Line Items]      
Short-term debt $ 12.1 $ 6.3 $ 5.7
Weighted average interest rate (percentage) 4.10% 4.40% 3.50%
Revolving Credit Facility      
Debt (Details) - Schedule of debt [Line Items]      
Long-term debt $ 0.0 $ 0.0 $ 0.0
Interest rate (percent) 0.00% 0.00% 0.00%