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Acquisitions (Intangible Assets) (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 05, 2018
Nov. 17, 2017
Nov. 03, 2019
Nov. 04, 2018
Customer contracts and related relationships        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Weighted-average amortization periods (in years)     5 years 5 years
Order backlog        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Weighted-average amortization periods (in years)     3 years  
CA Technologies, Inc.        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets $ 11,853      
Total identified intangible assets 12,045      
CA Technologies, Inc. | In-process research and development        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified indefinite-lived intangible assets 192      
CA Technologies, Inc. | Developed technology        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets $ 4,957      
Weighted-average amortization periods (in years) 6 years      
CA Technologies, Inc. | Customer contracts and related relationships        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets $ 4,190      
Weighted-average amortization periods (in years) 6 years      
CA Technologies, Inc. | Order backlog        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets $ 2,569      
Weighted-average amortization periods (in years) 3 years      
CA Technologies, Inc. | Trade name and other        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets $ 137      
Weighted-average amortization periods (in years) 5 years      
Brocade Communications Systems, Inc.        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets   $ 3,241    
Total identified intangible assets   3,396    
Brocade Communications Systems, Inc. | In-process research and development        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified indefinite-lived intangible assets   155    
Brocade Communications Systems, Inc. | Developed technology        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets   $ 2,925    
Weighted-average amortization periods (in years)   10 years    
Brocade Communications Systems, Inc. | Customer contracts and related relationships        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets   $ 255    
Weighted-average amortization periods (in years)   11 years    
Brocade Communications Systems, Inc. | Trade name and other        
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]        
Identified finite-lived intangible assets   $ 61    
Weighted-average amortization periods (in years)   6 years