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Estimated Future Benefit Payments (Detail) (USD $)
In Millions, unless otherwise specified
Sep. 29, 2012
Pension Plans
 
Defined Benefit Plan Disclosure [Line Items]  
2013 $ 373
2014 333
2015 358
2016 382
2017 416
2018 - 2022 2,463
Postretirement Medical Plans
 
Defined Benefit Plan Disclosure [Line Items]  
2013 43 [1]
2014 46 [1]
2015 49 [1]
2016 52 [1]
2017 56 [1]
2018 - 2022 $ 349 [1]
[1] Estimated future benefit payments are net of expected Medicare subsidy receipts of $70 million.