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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Nov. 04, 2018
Aug. 05, 2018
May 06, 2018
Feb. 04, 2018
Oct. 29, 2017
Jul. 30, 2017
Apr. 30, 2017
Jan. 29, 2017
Nov. 04, 2018
Oct. 29, 2017
Oct. 30, 2016
Earnings Per Share, Basic [Abstract]                      
Income (loss) per share from continuing operations (in dollars per share)                 $ 29.37 $ 4.19 $ (4.46)
Loss per share from discontinued operations, net of income taxes (in dollars per share)                 (0.04) (0.01) (0.29)
Net income (loss) per share (in dollars per share)                 29.33 4.18 (4.75)
Earnings Per Share, Diluted [Abstract]                      
Income (loss) per share from continuing operations (in dollars per share) $ 2.64 $ 2.71 $ 8.34 $ 14.66 $ 1.24 $ 1.14 $ 1.06 $ 0.58 28.48 4.03 (4.57)
Loss per share from discontinued operations, net of income taxes (in dollars per share) 0.00 0.00 (0.01) (0.04) 0.01 0.00 (0.01) (0.01) (0.04) (0.01) (0.29)
Net income (loss) per share (in dollars per share) $ 2.64 $ 2.71 $ 8.33 $ 14.62 $ 1.25 $ 1.14 $ 1.05 $ 0.57 $ 28.44 $ 4.02 $ (4.86)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]                      
Weighted average number of shares outstanding, basic                 418 405 366
Dilutive effect of equity awards                 13 16 0
Exchange of noncontrolling interest                 0 0 17
Weighted average number of shares outstanding, diluted                 431 421 383
Antidilutive securities excluded from computation of earnings per share                 9 22 12
Net Income (Loss) Available to Common Stockholders, Operations, Basic [Abstract]                      
Income (loss) from continuing operations $ 1,115 [1] $ 1,197 [2] $ 3,736 [3] $ 6,581 [4] $ 556 [5] $ 509 [6] $ 468 [7] $ 257 [8] $ 12,629 $ 1,790 $ (1,749)
Less: Income (loss) from continuing operations attributable to noncontrolling interest                 352 92 (116)
Income (loss) from continuing operations attributable to common stock                 12,277 1,698 (1,633)
Loss from discontinued operations, net of income taxes 0 [1] (1) [2] (3) [3] (15) [4] 5 [5] (2) [6] (4) [7] (5) [8] (19) (6) (112)
Less: Loss from discontinued operations, net of income taxes, attributable to noncontrolling interest                 (1) 0 (6)
Loss from discontinued operations, net of income taxes, attributable to common stock                 (18) (6) (106)
Net income (loss) attributable to common stock $ 1,115 $ 1,196 $ 3,718 $ 6,230 $ 532 $ 481 $ 440 $ 239 12,259 1,692 (1,739)
Net Income (Loss) Available to Common Stockholders, Operations, Diluted [Abstract]                      
Income (loss) from continuing operations, diluted                 12,277 1,698 (1,749)
Less: Loss from discontinued operations, net of taxes, diluted                 (18) (6) (112)
Net income (loss), diluted                 $ 12,259 $ 1,692 $ (1,861)
[1] Includes amortization of acquisition-related intangible assets of $829 million and impairment on investment of $106 million.
[2] Includes amortization of acquisition-related intangible assets of $830 million.
[3] Includes amortization of acquisition-related intangible assets of $832 million.
[4] Includes the results of Brocade beginning with the fiscal quarter ended February 4, 2018 in connection with the completion of the Brocade Merger on November 17, 2017. Also includes amortization of acquisition-related intangible assets of $1,054 million, a purchase accounting effect on inventory charge of $70 million and restructuring, impairment and disposal charges of $145 million.
[5] Includes amortization of acquisition-related intangible assets of $1,099 million and $110 million of litigation settlement charges.
[6] Includes amortization of acquisition-related intangible assets of $1,096 million.
[7] Includes amortization of acquisition-related intangible assets of $1,081 million.
[8] Includes amortization of acquisition-related intangible assets of $999 million and a loss on debt extinguishment of $159 million.