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Balance Sheet Detail - Inventories (Details) - USD ($)
$ in Millions
Jul. 26, 2020
Oct. 27, 2019
Inventories    
Customer service spares $ 1,217 $ 1,245
Raw materials 892 802
Work-in-process 662 575
Finished goods 1,181 852
Inventories 3,952 3,474
Inventory at customer locations included in finished goods 6 13
Inventory, finished goods, evaluation inventory, net of reserves $ 413 $ 318