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Balance Sheet Detail (Inventory) (Details) - USD ($)
$ in Millions
Oct. 29, 2017
Oct. 30, 2016
Oct. 25, 2015
Inventories      
Customer service spares $ 595 $ 452  
Raw materials 603 474  
Work-in-process 468 393  
Finished goods 1,264 731  
Total Inventories 2,930 2,050 $ 1,833
Inventory at customer locations included in finished goods 331 190  
Evaluation inventory $ 281 $ 197