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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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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.

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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