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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Other comprehensive income (loss), tax, parenthetical disclosures [Abstract]    
Unrealized gain (loss) on derivative instruments, tax $ (1) $ 0
Amounts reclassified into earnings related to derivative instruments, tax 0 0
Foreign currency translation, tax 0 0
Net defined benefit pension cost and post retirement plan costs, tax [Abstract]    
Change in actuarial net loss, tax 0 (3)
Change in net prior service credit, tax $ 1 $ 1