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STOCKHOLDERS' EQUITY - Reclassifications out of accumulated comprehensive income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified out of accumulated other comprehensive income (loss) $ (8)   $ (11)  
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax 0 $ 0 0 $ 0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax 0 0 0 8
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 2 1 5 4
Amounts reclassified into earnings related to derivative instruments, tax (1) 0 (2) (1)
Unrealized gain (loss) on derivatives after reclassification and after Tax 1 1 3 3
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax (6) (5) (6) (8)
Actuarial net loss and prior service benefit reclassified, before tax 6 5 6 8
Tax on actuarial net loss and prior service benefit reclassified (2) (1) (2) (2)
Actuarial net loss and prior service benefit reclassified, net of tax 4 4 4 6
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 5 5 7 17
Other Income (Expense)        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified out of accumulated other comprehensive income (loss) 0 0 0 8
Foreign Currency Gain (Loss)        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Amounts reclassified out of accumulated other comprehensive income (loss) 0 0 0 8
Cost of Products and Services        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 3 2 6 5
Interest Expense        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax $ (1) $ (1) $ (1) $ (1)