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Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Nov. 04, 2018
Oct. 29, 2017
Oct. 30, 2016
Allowance for Distributor Credit [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Period Start [1] $ 177 $ 252 $ 66
Valuation Allowance and Reserves Additions [1] 882 1,176 1,216
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction [1] (908) (1,251) (1,030)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Period End [1] 151 177 252
Allowance for Doubtful Accounts and Sales Returns [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Period Start [2] 31 40 9
Valuation Allowance and Reserves Additions [2] 116 49 142
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction [2] (135) (58) (111)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Period End [2] 12 31 40
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Period Start [3] 1,447 1,003 147
Valuation Allowance and Reserves Additions [3] 314 460 882
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction [3] (414) (16) (26)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Period End [3] $ 1,347 $ 1,447 $ 1,003
[1] Distributor credit allowances relate to price adjustments and other allowances.
[2] Other accounts receivable allowances primarily include sales returns and allowance for doubtful accounts.
[3] The decrease in the fiscal year 2018 valuation allowance resulted from restructuring activities offset by increases due to the Brocade Merger and in foreign deferred tax assets arising from foreign credits and losses not expected to be realized. The increase in the fiscal year 2017 valuation allowances resulted from foreign deferred tax assets arising from foreign losses not expected to be realized.