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Financial Instruments (Details) (USD $)
Sep. 28, 2012
Sep. 30, 2011
Financial Instruments    
Gross notional amount of foreign exchange contracts $ 225,000,000 $ 766,000,000
Gross notional amount of foreign exchange forward contracts    224,000,000
Gross notional amount of interest rate contracts    1,200,000,000
Maximum amount of future exposure on credit risk derivatives $ 1,000,000