v3.26.1
RESTRUCTURING AND OTHER RELATED COSTS - ROLLFORWARD (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2026
Apr. 30, 2026
Jan. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Restructuring Cost and Reserve [Line Items]            
Income statement expense $ 15     $ 17 $ 43 $ 74
Restructuring expense since inception 124       124  
FY25 Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense since inception 109       109  
FY26 Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Restructuring expense since inception 15       15  
Employee Severance            
Restructuring Cost and Reserve [Line Items]            
Restructuring Reserve, Beginning Balance 5 $ 16 $ 18   18  
Income statement expense 15 8 20      
Restructuring Reserve, Settled without Cash (1) (3) (3)      
Payments for Restructuring (6) (16) (19)      
Restructuring Reserve, Ending Balance 13 5 16   13  
Employee Severance | FY25 Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Restructuring Reserve, Beginning Balance 5 16 18   18  
Income statement expense 0 8 20   28  
Restructuring Reserve, Settled without Cash   (3) (3)      
Payments for Restructuring (1) (16) (19)      
Restructuring Reserve, Ending Balance 4 5 $ 16   4  
Employee Severance | FY26 Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Restructuring Reserve, Beginning Balance 0          
Income statement expense 15       15  
Restructuring Reserve, Settled without Cash (1)          
Payments for Restructuring (5)          
Restructuring Reserve, Ending Balance $ 9 $ 0     $ 9