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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jan. 31, 2018
Jan. 31, 2017
Jul. 31, 2019
Jul. 31, 2018
Pension Plan | United States            
Defined Benefit Plan, Net Periodic Benefit Cost            
Service cost - benefits earned during the period $ 0 $ 0     $ 0 $ 0
Interest cost on benefit obligation 5 4     15 12
Expected return on plan assets (7) (7)     (21) (21)
Amortization:            
Actuarial losses 0 1     0 1
Prior service credits 0 0     0 0
Total net plan costs (2) (2)     (6) (8)
Pension Plan | Foreign Plan            
Defined Benefit Plan, Net Periodic Benefit Cost            
Service cost - benefits earned during the period 6 6     16 16
Interest cost on benefit obligation 3 3     9 9
Expected return on plan assets (11) (11)     (33) (34)
Amortization:            
Actuarial losses 9 7     27 22
Prior service credits 0 0     0 0
Total net plan costs 7 5     19 13
Curtailments and Settlements            
Settlement gain     $ 5 $ 32 0 5
Other Postretirement Benefits Plan | United States            
Defined Benefit Plan, Net Periodic Benefit Cost            
Service cost - benefits earned during the period 0 0     0 0
Interest cost on benefit obligation 1 1     2 3
Expected return on plan assets (1) (2)     (3) (6)
Amortization:            
Actuarial losses 1 2     3 6
Prior service credits (2) (2)     (6) (6)
Total net plan costs $ (1) $ (1)     $ (4) $ (3)