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Fair Value - Schedule of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions | Apr. 30, 2025 | Oct. 31, 2024
--- | --- | ---
Assets |  |
Total assets | $ 10,629 | $ 13,744
Liabilities |  |
Total liabilities | 417 | 163
Time deposits |  |
Assets |  |
Total assets | 2,335 | 601
Money market funds |  |
Assets |  |
Total assets | 7,969 | 12,639
Equity investments |  |
Assets |  |
Total assets | 54 | 88
Foreign bonds |  |
Assets |  |
Total assets | 107 | 103
Other debt securities |  |
Assets |  |
Total assets | 9 | 14
Foreign exchange contracts |  |
Assets |  |
Total assets | 152 | 299
Liabilities |  |
Total liabilities | 389 | 103
Interest rate contracts |  |
Liabilities |  |
Total liabilities | 28 | 58
Other derivatives |  |
Assets |  |
Total assets | 3 | 0
Liabilities |  |
Total liabilities | 0 | 2
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets |  |
Total assets | 7,969 | 12,639
Liabilities |  |
Total liabilities | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Time deposits |  |
Assets |  |
Total assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds |  |
Assets |  |
Total assets | 7,969 | 12,639
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity investments |  |
Assets |  |
Total assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign bonds |  |
Assets |  |
Total assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other debt securities |  |
Assets |  |
Total assets | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange contracts |  |
Assets |  |
Total assets | 0 | 0
Liabilities |  |
Total liabilities | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contracts |  |
Liabilities |  |
Total liabilities | 0 | 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other derivatives |  |
Assets |  |
Total assets | 0 | 0
Liabilities |  |
Total liabilities | 0 | 0
Significant Other Observable Remaining Inputs (Level 2) |  |
Assets |  |
Total assets | 2,596 | 1,002
Liabilities |  |
Total liabilities | 417 | 163
Significant Other Observable Remaining Inputs (Level 2) | Time deposits |  |
Assets |  |
Total assets | 2,335 | 601
Significant Other Observable Remaining Inputs (Level 2) | Money market funds |  |
Assets |  |
Total assets | 0 | 0
Significant Other Observable Remaining Inputs (Level 2) | Equity investments |  |
Assets |  |
Total assets | 0 | 0
Significant Other Observable Remaining Inputs (Level 2) | Foreign bonds |  |
Assets |  |
Total assets | 106 | 102
Significant Other Observable Remaining Inputs (Level 2) | Other debt securities |  |
Assets |  |
Total assets | 0 | 0
Significant Other Observable Remaining Inputs (Level 2) | Foreign exchange contracts |  |
Assets |  |
Total assets | 152 | 299
Liabilities |  |
Total liabilities | 389 | 103
Significant Other Observable Remaining Inputs (Level 2) | Interest rate contracts |  |
Liabilities |  |
Total liabilities | 28 | 58
Significant Other Observable Remaining Inputs (Level 2) | Other derivatives |  |
Assets |  |
Total assets | 3 | 0
Liabilities |  |
Total liabilities | 0 | 2
Significant Other Unobservable Remaining Inputs (Level 3) |  |
Assets |  |
Total assets | 64 | 103
Liabilities |  |
Total liabilities | 0 | 0
Significant Other Unobservable Remaining Inputs (Level 3) | Time deposits |  |
Assets |  |
Total assets | 0 | 0
Significant Other Unobservable Remaining Inputs (Level 3) | Money market funds |  |
Assets |  |
Total assets | 0 | 0
Significant Other Unobservable Remaining Inputs (Level 3) | Equity investments |  |
Assets |  |
Total assets | 54 | 88
Significant Other Unobservable Remaining Inputs (Level 3) | Foreign bonds |  |
Assets |  |
Total assets | 1 | 1
Significant Other Unobservable Remaining Inputs (Level 3) | Other debt securities |  |
Assets |  |
Total assets | 9 | 14
Significant Other Unobservable Remaining Inputs (Level 3) | Foreign exchange contracts |  |
Assets |  |
Total assets | 0 | 0
Liabilities |  |
Total liabilities | 0 | 0
Significant Other Unobservable Remaining Inputs (Level 3) | Interest rate contracts |  |
Liabilities |  |
Total liabilities | 0 | 0
Significant Other Unobservable Remaining Inputs (Level 3) | Other derivatives |  |
Assets |  |
Total assets | 0 | 0
Liabilities |  |
Total liabilities | $ 0 | $ 0

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