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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jul. 01, 2017
Jul. 02, 2016
Oct. 01, 2016
Income Tax Disclosure [Abstract]          
Effective tax rate for continuing operations 27.40% 31.80% 32.50% 33.20%  
Unrecognized Tax Benefit, Percent Reduction Resulting from Lapse of Applicable Statute of Limitations 2.90% 1.10%   1.40%  
Effective Income Tax Rate Reconciliation, Benefit Recognized on the Outside Basis Difference in an Asset Held for Sale 4.20%   1.30%    
Unrecognized tax benefits $ 311   $ 311   $ 305
Unrecognized tax benefits, reductions that could result from expiration of statutes of limitations $ 10   $ 10