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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, 2017
Jul. 31, 2016
Jul. 31, 2017
Jul. 31, 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 0 0 12
Interest cost on benefit obligation 4 4 12 11
Expected return on plan assets (7) (6) (19) (18)
Amortization:        
Actuarial losses 0 0 2 2
Prior service cost 0 0 (1) (2)
Total net plan costs (3) (2) (6) 5
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 5 5 13 14
Interest cost on benefit obligation 3 4 9 12
Expected return on plan assets (10) (11) (30) (33)
Amortization:        
Actuarial losses 9 7 27 21
Prior service cost 0 0 0 0
Total net plan costs 7 5 19 14
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 1 1 4 3
Expected return on plan assets (1) (2) (5) (5)
Amortization:        
Actuarial losses 3 3 8 8
Prior service cost (2) (3) (6) (8)
Total net plan costs $ 1 $ (1) $ 1 $ (2)