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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Feb. 28, 2015
Feb. 28, 2015
Feb. 27, 2016
May. 30, 2015
Income Tax Disclosure [Abstract]        
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 0.2 $ 0.3    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued     $ 0.9  
Liability for Uncertain Tax Positions, Current     $ 2.6 $ 1.8