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Income Taxes (Provision For Income Taxes From Continuing Operations) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Income Tax Disclosure [Abstract]      
Federal $ (426) $ 755 $ 710
State 118 81 118
Foreign 26 14 (2)
Current 583 889 742
Deferred (865) (39) 84
Income Tax Expense (Benefit) $ (282) $ 850 $ 826