v3.26.1
RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2026
Apr. 30, 2025
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 4 5 9 10
Expected return on plan assets (6) (6) (12) (12)
Amortization of net actuarial gain (loss) 0 0 0 0
Total net periodic benefit cost (income) (2) (1) (3) (2)
Pension Plan | Foreign Plan        
Defined Benefit Plan, Net Periodic Benefit Cost (Income)        
Service cost - benefits earned during the period 2 2 8 7
Interest cost on benefit obligation 7 5 12 11
Expected return on plan assets (13) (10) (25) (21)
Amortization of net actuarial gain (loss) 7 6 14 12
Total net periodic benefit cost (income) (11) (9) (19) (15)
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 1 2 2 2
Expected return on plan assets (1) (2) (3) (3)
Amortization of net actuarial gain (loss) 1 1 1 1
Total net periodic benefit cost (income) $ (1) $ (1) $ (2) $ (2)