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STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
AOCI (Rollforward)        
Beginning Balance $ (280)   $ (305)  
Other comprehensive income (loss) before reclassifications (2)   29  
Amounts reclassified out of accumulated other comprehensive income (loss) (1)   (12)  
Tax expense (benefit) 0   (5)  
Other comprehensive income (loss) (3) $ 6 22 $ (4)
Ending Balance (283)   (283)  
Foreign Currency Translation        
AOCI (Rollforward)        
Beginning Balance (288)   (323)  
Other comprehensive income (loss) before reclassifications (5)   30  
Amounts reclassified out of accumulated other comprehensive income (loss) 0   0  
Tax expense (benefit) 0   0  
Other comprehensive income (loss) (5)   30  
Ending Balance (293)   (293)  
Prior Service Credits        
AOCI (Rollforward)        
Beginning Balance 121   121  
Other comprehensive income (loss) before reclassifications 0   0  
Amounts reclassified out of accumulated other comprehensive income (loss) (1)   (1)  
Tax expense (benefit) 0   0  
Other comprehensive income (loss) (1)   (1)  
Ending Balance 120   120  
Actuarial Losses        
AOCI (Rollforward)        
Beginning Balance (116)   (112)  
Other comprehensive income (loss) before reclassifications 0   0  
Amounts reclassified out of accumulated other comprehensive income (loss) (7)   (13)  
Tax expense (benefit) (3)   (5)  
Other comprehensive income (loss) (4)   (8)  
Ending Balance (120)   (120)  
Unrealized Gains (Losses) on Derivatives        
AOCI (Rollforward)        
Beginning Balance 3   9  
Other comprehensive income (loss) before reclassifications 3   (1)  
Amounts reclassified out of accumulated other comprehensive income (loss) 7   2  
Tax expense (benefit) 3   0  
Other comprehensive income (loss) 7   1  
Ending Balance $ 10   $ 10