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Acquisitions (Unaudited Pro Forma Information) (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 03, 2019
Nov. 04, 2018
Oct. 29, 2017
CA Technologies, Inc.      
Business Acquisition [Line Items]      
Pro forma net revenue $ 21,697 $ 24,451  
Pro forma net income attributable to common stock $ 2,535 9,783  
Brocade Communications Systems, Inc.      
Business Acquisition [Line Items]      
Pro forma net revenue   20,978 $ 19,441
Pro forma net income attributable to common stock   12,408 $ 986
Acquisition-related Costs [Member] | CA Technologies, Inc.      
Business Acquisition [Line Items]      
Business Combination, Acquisition Related Costs   $ 180