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Guarantees (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Guarantees disclosure    
Performance guarantee obligations for 2007 separation, fair value $ 3 $ 4
Performance guarantee obligations for 2012 separation, fair value 3   
Letters of credit and bank guarantees outstanding 425  
Roll-forward of warranty accrual:    
Warranty accrual, balance at the beginning of the period 32  
Warranties issued 16  
Changes in estimates 1  
Settlements (19)  
Warranty accrual, balance at the end of the period $ 30