Condensed Consolidated Balance Sheets - Unaudited Parenthetical - USD ($) shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
Jan. 31, 2021	Nov. 01, 2020
Statement of Financial Position [Abstract]
Preferred stock, Shares issued	4	4
Preferred stock, Shares outstanding	4	4
Preferred Stock, Liquidation Preference, Value	$ 3,738	$ 3,738
Preferred stock, Par value per share	$ 0.001	$ 0.001
Preferred stock, Shares authorized	100	100
Preferred Stock, Dividend Rate, Percentage	8.00%	8.00%
Common stock, Par value per share	$ 0.001	$ 0.001
Common stock, Shares authorized	2,900	2,900
Common stock, Shares issued	408	407
Common stock, Shares outstanding	408	407

Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The percentage rate used to calculate dividend payments on preferred stock.

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Value of the difference between preference in liquidation and the par or stated values of the preferred shares.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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