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Goodwill, Purchased Technology and Other Intangible Assets (Estimated Amortization Expense) (Details) - USD ($)
$ in Millions
Jan. 29, 2017
Oct. 30, 2016
Future estimated amortization expense    
2017 (remaining 9 months) $ 140  
2018 185  
2019 44  
2020 39  
2021 35  
Thereafter 61  
Total $ 504 $ 550