Derivative Instruments - Gross Contract Notional Volume of Outstanding Derivative Contracts (Detail) (Commodity Contracts [Member], Corn [Member])	Mar. 29, 2014 bu	Sep. 28, 2013 bu	Mar. 30, 2013 bu
Commodity Contracts [Member] | Corn [Member]
Derivative [Line Items]
Derivative commodity contracts outstanding volume	0	0	915,000