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Valuation And Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Allowance for Doubtful Accounts [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 34 $ 46 $ 33
Charged to Costs and Expenses 1 5 17
Charged to Other Accounts 0 0 0
(Deductions) (8) (17) (4)
Balance at End of Period 27 34 46
Inventory Lower of Cost or Market Allowance [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 7 16 24
Charged to Costs and Expenses 99 14 49
Charged to Other Accounts 0 0 0
(Deductions) (48) (23) (57)
Balance at End of Period 58 7 16
Valuation Allowance on Deferred Tax Assets [Member]      
Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 51 77 78
Charged to Costs and Expenses 21 26 8
Charged to Other Accounts 0 13 0
(Deductions) (4) (65) (9)
Balance at End of Period $ 68 $ 51 $ 77