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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Contributions) (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2020
Jan. 31, 2019
United States | Defined benefit plan    
Defined Benefit Plan Disclosure    
Contributions by employer $ 0 $ 0
Estimated future employer contributions in remainder of current fiscal year 0  
United States | Post-retirement Benefits Plan    
Defined Benefit Plan Disclosure    
Contributions by employer 0 0
Non-US | Defined benefit plan    
Defined Benefit Plan Disclosure    
Contributions by employer 2 $ 8
Estimated future employer contributions in remainder of current fiscal year $ 6