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FAIR VALUE MEASUREMENTS - Non marketable securities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2024 | Oct. 31, 2023 | Oct. 31, 2022
Fair Value Disclosures [Abstract] |  |  |
Impairments in non-marketable securities without readily determinable fair value | $ 11 |  |
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount | (1) | $ (26) |
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | 2 |  | $ 6
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount | 40 | 38 |
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount | 30 | 29 |
Equity investments - without readily determinable fair value | 101 | 102 |
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount | 11 |  |
Unrealized gain (loss) on equity securities | $ 6 | $ (26) | $ (78)

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- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-4 + Details
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- Definition Amount of loss from downward price adjustment on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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- Definition Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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- Definition Amount of cumulative gain from upward price adjustment on investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-3 + Details
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