FAIR VALUE MEASUREMENTS, Non Marketable Securities (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Apr. 30, 2026 |
Apr. 30, 2025 |
Apr. 30, 2026 |
Apr. 30, 2025 |
|
| Fair Value Disclosures [Abstract] | ||||
| Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | $ 0 | $ 0 | $ 0 | $ 0 |
| Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount | 1 | 26 | 1 | 27 |
| Impairment of investments, Annual Amount | $ 0 | $ 15 | $ 0 | $ 15 |