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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Net Pension and post-retirement benefit cost(benefit) components) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Defined benefit plan | United States        
Defined Benefit Plan Disclosure        
Service cost—benefits earned during the period $ 5 $ 5 $ 17 $ 15
Interest cost on benefit obligation 6 7 18 21
Expected return on plan assets (11) (10) (33) (31)
Net actuarial loss 5 3 14 8
Prior service credit 0 (1) 0 (3)
Settlement loss     0 0
Net periodic benefit cost (benefit) 5 4 16 10
Defined benefit plan | Non-US        
Defined Benefit Plan Disclosure        
Service cost—benefits earned during the period 4 3 11 10
Interest cost on benefit obligation 4 6 12 17
Expected return on plan assets (20) (19) (62) (58)
Net actuarial loss 8 6 25 20
Prior service credit 0 0 0 0
Settlement loss     0 2
Net periodic benefit cost (benefit) (4) (4) (14) (9)
Post-retirement Benefits Plan | United States        
Defined Benefit Plan Disclosure        
Service cost—benefits earned during the period 1 1 1 1
Interest cost on benefit obligation 1 2 4 6
Expected return on plan assets (3) (3) (9) (9)
Net actuarial loss 3 3 8 7
Prior service credit (3) (4) (9) (11)
Settlement loss     0 0
Net periodic benefit cost (benefit) $ (1) $ (1) $ (5) $ (6)