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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Net income (loss) $ 205 $ 164 $ (115) $ 332
Other comprehensive income (loss):        
Unrealized gain (loss) on derivative instruments, net of tax expense (benefit) of $1, $0 $(2)and $1 4 (1) (3) 0
Amounts reclassified into earnings related to derivative instruments, net of tax expense (benefit) of $2, $0, $2 and $(1) 3 (1) 3 (1)
Foreign currency translation, net of tax expense of $0, $1, $0 and $0 (53) 7 26 4
Net defined benefit pension cost and post retirement plan costs:        
Change in actuarial net loss, net of tax expense of $3, $3, $5 and $11 7 9 13 26
Change in net prior service benefit, net of tax benefit of $0, $(1), $(1) and $(2) (2) (2) (3) (3)
Other comprehensive income (loss) (41) 12 36 26
Total comprehensive income (loss) $ 164 $ 176 $ (79) $ 358