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Discontinued Operations - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Jun. 29, 2013
Australian Bakery
Gain (Loss) on Sale of Discontinued Operations      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax     $ 85
Gain (loss) on sale of disc. operations, net of tax $ 0 $ 2 $ 42