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Goodwill, Purchased Technology and Other Intangible Assets (Details 5) (USD $)
In Millions, unless otherwise specified
Jul. 28, 2013
Oct. 28, 2012
Future estimated amortization expense    
2013 $ 46  
2014 180  
2015 175  
2016 168  
2017 165  
Thereafter 272  
Carrying amount $ 1,006 $ 1,213