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Stockholders' Deficit - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2023 | Apr. 30, 2022 | Apr. 30, 2023 | Apr. 30, 2022
Stockholders' Equity Note [Abstract] |  |  |  |
Repurchases of common stock (shares) | 0 | 27,000,000 | 3,600,000 | 69,000,000
Payment in connection with repurchases of shares |  | $ 1,000 | $ 100 | $ 2,518
Shares settled (in shares) |  | 1,000,000 |  | 1,000,000
Share repurchase authorization remaining | $ 2,000 |  | $ 2,000 |

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