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Property And Equipment (Summary Of Cost And Accumulated Depreciation Of Property And Equipment) (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 29, 2012
Dec. 31, 2011
Capital Leased Assets [Line Items]    
Accumulated depreciation $ (11.3) $ (10.6)
Net book value 17.7 21.0
Building And Improvements [Member]
   
Capital Leased Assets [Line Items]    
Capital leases, gross 27.4 30.0
Machinery, Equipment And Computer Software [Member]
   
Capital Leased Assets [Line Items]    
Capital leases, gross $ 1.6 $ 1.6