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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($) $ in Millions | 3 Months Ended
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Jan. 31, 2020 | Jan. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives |  |
Unrealized gain (loss) on derivatives | $ 0 | $ 5
Unrealized gains and (losses) on derivatives reclassified to cost of products, before tax | 0 | 5
Reclassification of (gains) and losses into earnings related to derivative instruments, tax | 0 | (1)
Unrealized gains and (losses) on derivatives reclassified to cost of products, net of tax | 0 | 4
Actuarial net loss | (14) | (10)
Prior service benefit | 2 | 2
Actuarial net loss and prior service benefit reclassified, before tax | (12) | (8)
Tax on actuarial net loss and prior service benefit reclassified | 6 | 4
Actuarial net loss and prior service benefit reclassified, net of tax | (6) | (4)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | $ (6) | $ 0

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