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Derivative Financial Instruments - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Oct. 05, 2013
Oct. 05, 2013
Cash Flow Hedging
Oct. 05, 2013
Other Current Assets
Dec. 29, 2012
Other Current Assets
Aug. 01, 2008
Interest Rate Contracts
Cash Flow Hedging
ButterKrust
Aug. 01, 2008
Interest Rate Contracts
Cash Flow Hedging
Holsum
Derivative Instruments, Gain (Loss) [Line Items]            
Commodity derivatives fair value, net $ (4.4)          
Cash settlement on hedge 3.1          
Notional amount of interest rate swap   150.3     85.0 65.0
Term loan outstanding 150.0          
Derivative instrument, asset     $ 8.9 $ 9.0