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Acquisitions, Goodwill and Intangible Assets (Details 3) (USD $)
In Millions, unless otherwise specified
Oct. 31, 2014
Estimated future amortization expense related to finite-lived purchased intangible assets  
2015 $ 872us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 653us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 244us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 147us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 110us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter 102us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Amortizable intangible assets, net $ 2,128us-gaap_FiniteLivedIntangibleAssetsNet