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Valuation And Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Allowance for Doubtful Accounts [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 27 $ 34 $ 46
Charged to Costs and Expenses 10 1 5
Charged to Other Accounts 0 0 0
(Deductions) (4) (8) (17)
Balance at End of Period 33 27 34
Inventory Lower of Cost or Market Allowance [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 58 7 16
Charged to Costs and Expenses 70 99 14
Charged to Other Accounts 0 0 0
(Deductions) (89) (48) (23)
Balance at End of Period 39 58 7
Valuation Allowance on Deferred Tax Assets [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 68 51 77
Charged to Costs and Expenses 10 21 26
Charged to Other Accounts 0 0 13
(Deductions) (6) (4) (65)
Balance at End of Period $ 72 $ 68 $ 51