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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Income Tax Disclosures [Line Items]      
Domestic production deduction $ 68 $ 72 $ 50
Decrease in unrecognized tax benefits 43 34 58
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount 70 59  
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount   73  
Income (Loss) from Continuing Operations before Income Taxes, Domestic 2,543 1,908 $ 1,270
Tax credit carryforwards 42    
Accumulated undistributed earnings of foreign subsidiaries 219 139  
Unrecognized tax benefits that would impact effective tax rate 205 244  
Unrecognized tax benefits, income tax penalties and interest accrued 52 $ 46  
Decrease in Unrecognized Tax Benefits is Reasonably Possible 10    
State and Local Jurisdiction [Member]      
Income Tax Disclosures [Line Items]      
Operating loss carryforwards 845    
Foreign Country [Member]      
Income Tax Disclosures [Line Items]      
Operating loss carryforwards $ 35