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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives        
Unrealized gain (loss) on derivatives $ (5) $ 1 $ (5) $ 2
Unrealized gains and (losses) on derivatives reclassified to cost of products, before tax (5) 1 (5) 2
Reclassification of (gains) and losses into earnings related to derivative instruments, tax 2 0 2 (1)
Unrealized gains and (losses) on derivatives reclassified to cost of products, net of tax (3) 1 (3) 1
Actuarial net loss (10) (12) (19) (34)
Prior service benefit 2 3 4 5
Actuarial net loss and prior service benefit reclassified, before tax (8) (9) (15) (29)
Tax on actuarial net loss and prior service benefit reclassified 3 2 4 8
Actuarial net loss and prior service benefit reclassified, net of tax (5) (7) (11) (21)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ (8) $ (6) $ (14) $ (20)