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Property and Equipment - Summary of Cost and Accumulated Depreciation Of Property and Equipment Under Capital Leases (Detail) - USD ($)
$ in Millions
Dec. 30, 2017
Dec. 31, 2016
Capital Leased Assets [Line Items]    
Accumulated depreciation $ (14.0) $ (12.3)
Net book value 7.4 8.2
Buildings and Improvements [Member]    
Capital Leased Assets [Line Items]    
Capital leases, gross $ 21.4 $ 20.5