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Balance Sheet Detail - Inventories (Details) - USD ($)
$ in Millions
Jan. 26, 2020
Oct. 27, 2019
Inventories    
Customer service spares $ 1,203 $ 1,245
Raw materials 818 802
Work-in-process 619 575
Finished goods 832 852
Inventories 3,472 3,474
Inventory at customer locations included in finished goods 6 13
Inventory, finished goods, evaluation inventory, net of reserves $ 309 $ 318