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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Cost of Goods and Services Sold $ (442) $ (451) $ (870) $ (863)
Selling, general and administrative (300) (305) (588) (600)
Income Tax Expense (Benefit) (40) (19) (46) 98
Net income 153 64 267 158
Income before taxes 193 83 313 60
Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Net income (4) (5) (14) (9)
Unrealized gain (losses) on derivatives [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Cost of Goods and Services Sold 0 1 0 3
Selling, general and administrative 0 0 (1) 0
Income Tax Expense (Benefit) 0 0 0 0
Net income 0 1 (1) 3
Net defined benefit pension cost and post retirement plan costs, actuarial losses [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Income before taxes (12) (14) (26) (27)
Net defined benefit pension cost and post retirement plan costs, prior service credits [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Income before taxes 5 6 9 11
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]        
Income Tax Expense (Benefit) 3 2 4 4
Net income (4) (6) (13) (12)
Income before taxes $ (7) $ (8) $ (17) $ (16)