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Inventories - Inventory (Details) - USD ($)
$ in Millions
Jan. 31, 2019
Nov. 01, 2018
Oct. 31, 2018
Inventory Disclosure [Abstract]      
Finished products $ 739   $ 671
Work in process 163   118
Raw materials 309   321
Total inventories, net $ 1,211 $ 1,019 $ 1,110