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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2022 | Apr. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives |  |  |  |
Unrealized gain (loss) on derivatives | $ 5 | $ (6) | $ 8 | $ (14)
Amounts reclassified into earnings related to derivative instruments, tax | (1) | 2 | (2) | 4
Unrealized gain (loss) on derivatives after reclassification and after Tax | 4 | (4) | 6 | (10)
Actuarial net loss | (6) | (16) | (12) | (32)
Prior service benefit | 0 | 1 | 0 | 1
Actuarial net loss and prior service benefit reclassified, before tax | (6) | (15) | (12) | (31)
Tax on actuarial net loss and prior service benefit reclassified | 2 | 4 | 3 | 8
Actuarial net loss and prior service benefit reclassified, net of tax | (4) | (11) | (9) | (23)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 0 | (15) | (3) | (33)
Cost of Products and Services |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives |  |  |  |
Unrealized gain (loss) on derivatives | $ 5 | $ (6) | $ 8 | $ (14)

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- Definition Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e640-108580 + Details
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