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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Pension Plan | United States        
Defined Benefit Plan, Net Periodic Benefit Cost (Income)        
Service cost - benefits earned during the period $ 0 $ 0 $ 0 $ 0
Interest cost on benefit obligation 5 5 10 10
Expected return (loss) on plan assets (6) (5) (12) (10)
Amortization of net actuarial gain (loss) 0 0 0 (1)
Total net periodic benefit cost (income) (1) 0 (2) 1
Pension Plan | Foreign Plan        
Defined Benefit Plan, Net Periodic Benefit Cost (Income)        
Service cost - benefits earned during the period 2 3 7 8
Interest cost on benefit obligation 5 7 11 13
Expected return (loss) on plan assets (10) (10) (21) (19)
Amortization of net actuarial gain (loss) 6 4 12 8
Total net periodic benefit cost (income) (9) (4) (15) (6)
Curtailments and Settlements        
Settlement (gain) loss     14  
Other Postretirement Benefits Plan | United States        
Defined Benefit Plan, Net Periodic Benefit Cost (Income)        
Service cost - benefits earned during the period 0 0 0 0
Interest cost on benefit obligation 2 1 2 2
Expected return (loss) on plan assets (2) (1) (3) (2)
Amortization of net actuarial gain (loss) 1 1 1 1
Total net periodic benefit cost (income) $ (1) $ (1) $ (2) $ (1)