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Components of Gross and Net Intangible Asset Balances (Detail) - USD ($)
$ in Millions
Sep. 26, 2015
Sep. 27, 2014
Acquired Intangible Assets Including Goodwill [Line Items]    
Definite-lived and amortizable acquired intangible assets, Gross Carrying Amount $ 8,125 $ 7,127
Definite-lived and amortizable acquired intangible assets, Accumulated Amortization (4,332) (3,085)
Definite-lived and amortizable acquired intangible assets, Net Carrying Amount 3,793 4,042
Indefinite-lived and non-amortizable acquired intangible assets 100 100
Total acquired intangible assets, Net Carrying Amount $ 3,893 $ 4,142