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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Income Tax Disclosures [Line Items]      
Domestic production deduction $ 72 $ 50 $ 40
Decrease in unrecognized tax benefits 34 58  
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount 59    
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount 73    
General business credits     17
Income (Loss) from Continuing Operations before Income Taxes, Domestic 1,908 1,270 $ 1,204
Tax credit carryforwards 46    
Accumulated undistributed earnings of foreign subsidiaries 139 403  
Unrecognized tax benefits that would impact effective tax rate 244 241  
Unrecognized tax benefits, income tax penalties and interest accrued 46 $ 54  
Decrease in Unrecognized Tax Benefits is Reasonably Possible 14    
State and Local Jurisdiction [Member]      
Income Tax Disclosures [Line Items]      
Operating loss carryforwards 938    
Foreign Country [Member]      
Income Tax Disclosures [Line Items]      
Operating loss carryforwards $ 29