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STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ (567) $ (461) $ (578) $ (488)
Other comprehensive income (loss) before reclassifications 37 (5) 21 9
Amounts reclassified out of accumulated other comprehensive loss 13 7 41 25
Tax (expense) benefit (3) (1) (4) (6)
Other comprehensive income (loss) 47 1 58 28
Ending balance (520) (460) (520) (460)
Foreign currency translation [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (50) (46) (43) (60)
Other comprehensive income (loss) before reclassifications 37 (4) 30 10
Amounts reclassified out of accumulated other comprehensive loss 0 0 0 0
Tax (expense) benefit 0 0 0 0
Other comprehensive income (loss) 37 (4) 30 10
Ending balance (13) (50) (13) (50)
Net defined benefit pension cost and post retirement plan costs, actuarial losses        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (508) (424) (536) (445)
Other comprehensive income (loss) before reclassifications 0 0 0 2
Amounts reclassified out of accumulated other comprehensive loss 15 12 47 38
Tax (expense) benefit (4) (3) (8) (10)
Other comprehensive income (loss) 11 9 39 30
Ending balance (497) (415) (497) (415)
Net defined benefit pension cost and post retirement plan costs, prior service credits        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (1) 12 4 19
Other comprehensive income (loss) before reclassifications 0 0 0 0
Amounts reclassified out of accumulated other comprehensive loss (3) (5) (9) (14)
Tax (expense) benefit 1 2 2 4
Other comprehensive income (loss) (2) (3) (7) (10)
Ending balance (3) 9 (3) 9
Unrealized gain (losses) on derivatives        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (8) (3) (3) (2)
Other comprehensive income (loss) before reclassifications 0 (1) (9) (3)
Amounts reclassified out of accumulated other comprehensive loss 1 0 3 1
Tax (expense) benefit 0 0 2 0
Other comprehensive income (loss) 1 (1) (4) (2)
Ending balance $ (7) $ (4) $ (7) $ (4)