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Fair Value of Outstanding Commodity Swap Contracts and Related Classification in Condensed Consolidated Balance Sheet (Detail) (Commodity Contract, Designated as Hedging Instrument, USD $)
In Millions, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Commodity Contract | Designated as Hedging Instrument
   
Contracts qualifying for hedge accounting:    
Other current liabilities    $ (0.3)