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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Details) (Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Apr. 30, 2019
Apr. 30, 2018
US | Defined benefit plan        
Defined Benefit Plan Disclosure [Line Items]        
Contributions by employer $ 0 $ 0 $ 0 $ 0
Estimated future employer contributions in remainder of current fiscal year 0   0  
US | Post-retirement Benefits Plan        
Defined Benefit Plan Disclosure [Line Items]        
Contributions by employer 0 0 0 0
Non-US | Defined benefit plan        
Defined Benefit Plan Disclosure [Line Items]        
Contributions by employer 7 $ 7 15 $ 16
Estimated future employer contributions in remainder of current fiscal year $ 15   $ 15