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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, 2017
Apr. 30, 2016
Apr. 30, 2017
Apr. 30, 2016
Curtailments and Settlements        
Settlement gain (loss) $ 0 $ 0 $ 32 $ 1
Curtailment gain 0 0 0 15
Pensions (U.S. Plans)        
Defined Benefit Plan, Net Periodic Benefit Cost        
Service cost - benefits earned during the period 0 6 0 12
Interest cost on benefit obligation 5 4 8 7
Expected return on plan assets (6) (6) (12) (12)
Amortization:        
Actuarial losses 1 0 2 2
Prior service cost (1) (1) (1) (2)
Total net plan costs (1) 3 (3) 7
Curtailments and Settlements        
Curtailments and settlements       16
Settlement gain (loss)       1
Curtailment gain       15
Pensions (Non-U.S. Plans)        
Defined Benefit Plan, Net Periodic Benefit Cost        
Service cost - benefits earned during the period 4 5 8 9
Interest cost on benefit obligation 3 4 6 8
Expected return on plan assets (10) (11) (20) (22)
Amortization:        
Actuarial losses 9 7 18 14
Prior service cost 0 0 0 0
Total net plan costs 6 5 12 9
Curtailments and Settlements        
Settlement gain (loss)     32  
United States Post-retirement Benefit Plan        
Defined Benefit Plan, Net Periodic Benefit Cost        
Service cost - benefits earned during the period 0 0 0 0
Interest cost on benefit obligation 2 1 3 2
Expected return on plan assets (2) (1) (4) (3)
Amortization:        
Actuarial losses 2 2 5 5
Prior service cost (2) (3) (4) (5)
Total net plan costs $ 0 $ (1) $ 0 $ (1)