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Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Sep. 24, 2010
Commitments and Contingencies      
Rental expenses $ 299 $ 270 $ 292
Operating Leases      
2013 162    
2014 121    
2015 102    
2016 80    
2017 47    
Thereafter 79    
Total operating leases, minimum lease payments 591    
Purchase obligations      
2013 241    
2014 9    
2015 $ 3