v3.26.1
STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2026
Apr. 30, 2025
Jan. 31, 2026
Oct. 31, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ (202)   $ (202)   $ (184) $ (226)
Other comprehensive income (loss) before reclassifications (12)   33      
Amounts reclassified out of accumulated other comprehensive income (loss) (8)   (13)      
Tax expense (benefit) (2)   (4)      
Other comprehensive income (loss) (18) $ 101 24 $ 25    
Foreign Currency Translation            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (264)   (264)   (246) (297)
Other comprehensive income (loss) before reclassifications (18)   33      
Amounts reclassified out of accumulated other comprehensive income (loss) 0   0      
Tax expense (benefit) 0   0      
Other comprehensive income (loss) (18)   33      
Prior Service Credits            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 120   120   120 120
Other comprehensive income (loss) before reclassifications 0   0      
Amounts reclassified out of accumulated other comprehensive income (loss) 0   0      
Tax expense (benefit) 0   0      
Other comprehensive income (loss) 0   0      
Actuarial Losses            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (72)   (72)   (67) (64)
Other comprehensive income (loss) before reclassifications 0   4      
Amounts reclassified out of accumulated other comprehensive income (loss) (8)   (15)      
Tax expense (benefit) (3)   (3)      
Other comprehensive income (loss) (5)   (8)      
Unrealized Gains (Losses) on Derivatives            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 14   14   $ 9 $ 15
Other comprehensive income (loss) before reclassifications 6   (4)      
Amounts reclassified out of accumulated other comprehensive income (loss) 0   2      
Tax expense (benefit) 1   (1)      
Other comprehensive income (loss) $ 5   $ (1)