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Schedule of Long Term Debt (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2019
Jun. 01, 2019
Debt Instrument [Line Items]    
Document Period End Date Aug. 31, 2019  
Long-term debt $ 275.0 $ 281.9
Construction-Type Lease 0.0 6.9
Supplier financing program 3.3 3.1
Debt, Long-term and Short-term, Combined Amount 278.3 285.0
Short-term Debt (3.3) (3.1)
Syndicated revolving line of credit, due September 2021    
Debt Instrument [Line Items]    
Long-term debt 225.0 225.0
Debt securities, due March 1, 2021    
Debt Instrument [Line Items]    
Long-term debt $ 50.0 $ 50.0