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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2022 | Apr. 30, 2021
Other comprehensive income (loss), tax, parenthetical disclosures |  |  |  |
Unrealized gain (loss) on derivative instruments, tax | $ 5 | $ 0 | $ 7 | $ (2)
Amounts reclassified into earnings related to derivative instruments, tax | (1) | 2 | (2) | 4
Foreign currency translation, tax | 0 | 0 | 0 | 0
Net defined benefit pension cost and post retirement plan costs, tax |  |  |  |
Change in actuarial net loss, tax | 3 | 4 | 5 | 8
Change in net prior service benefit, tax | $ 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 -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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