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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018
Net income | $ 191 | $ 236 | $ 877 | $ 121
Other comprehensive income (loss): |  |  |  |
Unrealized gain on derivative instruments, net of tax expense of $1, $2, $0 and $0 | 3 | 6 | 2 | 3
Amounts reclassified into earnings related to derivative instruments, net of tax expense (benefit) of $(1), $0, $(2) and $2 | 0 | 1 | (4) | 4
Foreign currency translation, net of tax expense (benefit) of $(1), $0, $(10) and $0 | (12) | (39) | 1 | (13)
Net defined benefit pension cost and post retirement plan costs: |  |  |  |
Change in actuarial net loss, net of tax expense of $5, $3, $11 and $8 | 5 | 8 | 17 | 21
Change in net prior service benefit, net of tax benefit of $0, $(1), $(1) and $(2) | (2) | (1) | (5) | (4)
Other comprehensive income (loss) | (6) | (25) | 11 | 11
Total comprehensive income | $ 185 | $ 211 | $ 888 | $ 132

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