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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Jan. 31, 2018
Jan. 31, 2017
Apr. 30, 2019
Apr. 30, 2018
Pension Plan [Member] | Domestic Plan [Member]            
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     10 8
Expected return on plan assets (7) (7)     (14) (14)
Amortization:            
Actuarial losses 0 0     0 0
Prior service credits 0 0     0 0
Total net plan costs (2) (3)     (4) (6)
Pension Plan [Member] | Foreign Plan [Member]            
Defined Benefit Plan, Net Periodic Benefit Cost            
Service cost - benefits earned during the period 4 4     10 10
Interest cost on benefit obligation 3 3     6 6
Expected return on plan assets (11) (12)     (22) (23)
Amortization:            
Actuarial losses 9 8     18 15
Prior service credits 0 0     0 0
Total net plan costs 5 3     12 8
Curtailments and Settlements            
Settlement gain     $ 5 $ 32 0 5
Other Postretirement Benefits Plan [Member] | Domestic Plan [Member]            
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     1 2
Expected return on plan assets (1) (2)     (2) (4)
Amortization:            
Actuarial losses 1 2     2 4
Prior service credits (2) (2)     (4) (4)
Total net plan costs $ (1) $ (1)     $ (3) $ (2)