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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2019
Jul. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives        
Unrealized gain (loss) on derivatives $ 1 $ (1) $ 6 $ (6)
Unrealized gains and (losses) on derivatives reclassified to cost of products, before tax 1 (1) 6 (6)
Reclassification of (gains) and losses into earnings related to derivative instruments, tax (1) 0 (2) 2
Unrealized gains and (losses) on derivatives reclassified to cost of products, net of tax 0 (1) 4 (4)
Actuarial net loss (10) (10) (30) (29)
Prior service benefit 2 2 6 6
Actuarial net loss and prior service benefit reclassified, before tax (8) (8) (24) (23)
Tax on actuarial net loss and prior service benefit reclassified 5 2 10 6
Actuarial net loss and prior service benefit reclassified, net of tax (3) (6) (14) (17)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ (3) $ (7) $ (10) $ (21)