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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Apr. 30, 2021
Apr. 30, 2020
Other comprehensive income (loss), tax, parenthetical disclosures        
Unrealized gain (loss) on derivative instruments, tax $ 0 $ 0 $ (2) $ 0
Amounts reclassified into earnings related to derivative instruments, tax 2 0 4 0
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 4 2 8 5
Change in net prior service benefit, tax $ 0 $ (1) $ 0 $ 0