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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
Net income (loss) $ 182 $ 205 $ 686 $ (115)
Other comprehensive income (loss):        
Unrealized gain (loss) on derivative instruments, net of tax expense (benefit) of $1, $1, $(1) and $2 3 4 (1) (3)
Amounts reclassified into earnings related to derivative instruments, net of tax expense (benefit) of $0, $2, $(1) and $2 0 3 (4) 3
Foreign currency translation, net of tax expense (benefit) of $0, $0, $(9) and $0 (25) (53) 13 26
Net defined benefit pension cost and post retirement plan costs:        
Change in actuarial net loss, net of tax expense of $2, $3, $6 and $5 6 7 12 13
Change in net prior service benefit, net of tax benefit of $(1), $0, $(1) and $(1) (1) (2) (3) (3)
Other comprehensive income (loss) (17) (41) 17 36
Total comprehensive income (loss) $ 165 $ 164 $ 703 $ (79)