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Property and Equipment - Summary of Cost and Accumulated Depreciation of Property and Equipment under Capital Leases (Detail) - USD ($)
$ in Millions
Jan. 02, 2016
Jan. 03, 2015
Capital Leased Assets [Line Items]    
Accumulated depreciation $ (11.0) $ (9.7)
Net book value 9.1 10.5
Buildings and Improvements [Member]    
Capital Leased Assets [Line Items]    
Capital leases, gross $ 20.1 $ 20.2