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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Jul. 31, 2018
Jul. 31, 2017
Other comprehensive income (loss), tax, parenthetical disclosures        
Unrealized gain (loss) on derivative instruments, tax $ 2 $ (1) $ 0 $ 0
Amounts reclassified into earnings related to derivative instruments, tax 0 0 2 (1)
Foreign currency translation, tax 0 6 0 6
Net defined benefit pension cost and post retirement plan costs, tax        
Change in actuarial net loss, tax 3 4 8 15
Change in net prior service benefit, tax $ (1) $ (1) $ (2) $ (3)