Financial Contracts Hedging Commodity and Interest Rate Risk (Detail) (USD $) In Millions, unless otherwise specified	Oct. 06, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 208.8
Interest Rate Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	67.5
Wheat Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	106.5
Soybean Oil Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	24.6
Natural Gas Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount of interest rate swap	$ 10.2