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Goodwill and Intangible Assets (Details 3) (USD $)
In Millions, unless otherwise specified
Jan. 31, 2014
Estimated future amortization expense related to finite-lived purchased intangible assets  
2014 (remaining 9 months) $ 715
2015 864
2016 645
2017 237
2018 145
2019 110
Thereafter 101
Amortizable intangible assets, net $ 2,817