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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)

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