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Other Income/(Expense), Net (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Other Income Expense [Line Items]        
Interest and dividend income $ 766 $ 439 $ 2,095 $ 1,276
Interest expense (201) (100) (495) (269)
Other expense, net (175) (137) (754) (334)
Total other income/(expense), net $ 390 $ 202 $ 846 $ 673