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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated other comprehensive income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024 | Oct. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Amounts reclassified out of accumulated other comprehensive income (loss) | $ (14) | $ (23) |
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax | 0 | 0 |
Other Comprehensive Income (Loss) | 0 | 8 |
Unrealized gains (losses) on derivatives | (8) | 2 |
Amounts reclassified into earnings related to derivative instruments, tax expense (benefit) | 1 | (1) | $ 0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax | (7) | 1 | $ 0
Amortization of net actuarial (gain) loss | (21) | (12) |
Amortization of prior service benefit | 1 | 1 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 22 | 13 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax | 7 | 4 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax | 15 | 9 |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 8 | 18 |
Other Operating Income (Expense) |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Amounts reclassified out of accumulated other comprehensive income (loss) | 0 | 8 |
Foreign Currency Gain (Loss) |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Amounts reclassified out of accumulated other comprehensive income (loss) | 0 | 8 |
Cost of Product and Services |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Unrealized gains (losses) on derivatives | (6) | 4 |
Interest Expense |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Unrealized gains (losses) on derivatives | $ (2) | $ (2) |

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