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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 02, 2016
Mar. 28, 2015
Apr. 02, 2016
Mar. 28, 2015
Oct. 03, 2015
Income Tax Disclosure [Abstract]          
Effective tax rate for continuing operations 32.70% 35.60% 34.00% 32.40%  
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations 2.90%   1.40% 3.20%  
Unrecognized tax benefits $ 300   $ 300   $ 306
Unrecognized tax benefits, reductions that could result from tax audit resolutions $ 43   $ 43