Acquisitions (Intangible Assets) (Details) - USD ($) $ in Millions				12 Months Ended
	Nov. 04, 2019	Nov. 05, 2018	Nov. 17, 2017	Nov. 01, 2020	Nov. 03, 2019
Customer contracts and related relationships
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted-average amortization periods (in years)				4 years	5 years
Order backlog
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Weighted-average amortization periods (in years)				2 years	3 years
Symantec Asset Purchase
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Identified finite-lived intangible assets	$ 5,411
Total identified intangible assets	5,411
Symantec Asset Purchase | Developed technology
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Identified finite-lived intangible assets	$ 2,900
Weighted-average amortization periods (in years)	5 years
Symantec Asset Purchase | Customer contracts and related relationships
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Identified finite-lived intangible assets	$ 2,410
Weighted-average amortization periods (in years)	5 years
Symantec Asset Purchase | Trade name
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Identified finite-lived intangible assets	$ 90
Weighted-average amortization periods (in years)	6 years
Symantec Asset Purchase | Order or Production Backlog and Other
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Identified finite-lived intangible assets	$ 11
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