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Income Taxes (Provision For Income Taxes From Continuing Operations) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Income Tax Disclosure [Abstract]      
Federal $ 755 $ 710 $ 564
State 81 118 89
Foreign 14 (2) 44
Current 889 742 659
Deferred (39) 84 38
Income Tax Expense $ 850 $ 826 $ 697