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Financial Instruments - Cash Equivalents and Available-for-Sale Investments (Details) - USD ($) $ in Millions | Apr. 30, 2025 | Oct. 31, 2024
--- | --- | ---
Cash and Cash Equivalents [Line Items] |  |
Gross Unrealized Gains | $ 2 | $ 8
Total cash and equivalents and available-for-sale investments, Cost basis | 10,418 | 13,349
Total cash equivalents and available-for-sale debt investments | 10,420 | 13,357
Cost |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 10,304 | 13,240
Cost | Time deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 2,335 | 601
Cost | Money market funds |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 7,969 | 12,639
Fair Value |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 10,304 | 13,240
Fair Value | Time deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 2,335 | 601
Fair Value | Money market funds |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 7,969 | 12,639
Debt securities |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, available-for-sale, amortized cost, total | 114 | 109
Gross Unrealized Gains | 2 | 8
Fair Value | 116 | 117
Foreign bonds |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, available-for-sale, amortized cost, total | 107 | 101
Gross Unrealized Gains | 0 | 2
Fair Value | 107 | 103
Other debt securities |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, available-for-sale, amortized cost, total | 7 | 8
Gross Unrealized Gains | 2 | 6
Fair Value | $ 9 | $ 14

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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates and investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities. + References No definition available. + Details
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