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Goodwill, Purchased Technology and Other Intangible Assets (Details 5) (USD $)
In Millions, unless otherwise specified
Jan. 26, 2014
Oct. 27, 2013
Future estimated amortization expense    
2014 $ 135  
2015 175  
2016 169  
2017 165  
2018 163  
Thereafter 108  
Carrying amount $ 915 $ 961