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Lease Commitments - Schedule of Capital Leased Assets (Details) - USD ($)
$ in Millions
Apr. 28, 2018
Apr. 29, 2017
Capital Leased Assets [Line Items]    
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment $ (0.2) $ 0.0
Capital Leases, Balance Sheet, Assets by Major Class, Net 1.4 0.0
Machinery and equipment    
Capital Leased Assets [Line Items]    
Capital Leased Assets, Gross $ 1.6 $ 0.0