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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2024 | Apr. 30, 2023
Other comprehensive income (loss), tax, parenthetical disclosures |  |  |  |
Unrealized gain (loss) on derivative instruments, tax expense (benefit) | $ 2 | $ 4 | $ (1) | $ (5)
Amounts reclassified into earnings related to derivative instruments, tax expense (benefit) | 0 | 1 | (1) | (1)
Foreign currency translation, tax expense (benefit) | 0 | 0 | 0 | (1)
Net defined benefit pension cost and post retirement plan costs, tax |  |  |  |
Change in actuarial net gain (loss), tax expense (benefit) | (1) | 0 | (2) | 0
Change in net prior service benefit, tax expense | $ 0 | $ 0 | $ 0 | $ 0

X
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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 -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-12 + Details
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