Restructuring, Impairment and Disposal Charges (Details) - USD ($) $ in Millions	3 Months Ended
	Feb. 02, 2020	Feb. 03, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 62
Restructuring Reserve [Roll Forward]
Opening Balance	108
Restructuring charges	62
Utilization	55
Ending Balance	79
Restructuring Reserve, Accrual Adjustment	(36)
Employee Termination Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 51
Expected completion date	Nov. 02, 2020
Restructuring Reserve [Roll Forward]
Opening Balance	$ 69
Restructuring charges	51
Utilization	41
Ending Balance	79
Restructuring Reserve, Accrual Adjustment	0
Leases and Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring expense	11
Restructuring Reserve [Roll Forward]
Opening Balance	39
Restructuring charges	11
Utilization	14
Ending Balance	0
Restructuring Reserve, Accrual Adjustment	(36)
Symantec [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	33
Restructuring Reserve [Roll Forward]
Restructuring charges	33
CA Technologies, Inc.
Restructuring Cost and Reserve [Line Items]
Restructuring expense	19	$ 594
Restructuring Reserve [Roll Forward]
Restructuring charges	19	$ 594
Discontinued Operations, Held-for-sale [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 5