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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Sep. 28, 2013
Income Tax Disclosure [Abstract]      
Effective tax rate for continuing operations 34.30% 35.80%  
Unrecognized tax benefits $ 169   $ 175
Unrecognized tax benefits that would impact effective tax rate 144   149
Unrecognized tax benefits, income tax penalties and interest accrued 69   63
Unrecognized tax benefits, reductions that could result from tax audit resolutions $ 41