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Goodwill and Purchased Intangible Assets (Schedule Of Estimated Future Amortization Expense Of Purchased Intangible Assets) (Detail) (USD $)
In Millions, unless otherwise specified
Jul. 27, 2013
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]  
2014 $ 903
2015 820
2016 593
2017 440
2018 294
Thereafter 267
Finite-Lived Intangible Assets, Net $ 3,317