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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, 2016
Apr. 30, 2015
Apr. 30, 2016
Apr. 30, 2015
Curtailments and Settlements        
Curtailments and settlements $ 0 $ 0 $ 16 $ 0
Pensions (U.S. Plans)        
Defined Benefit Plan, Net Periodic Benefit Cost        
Service cost - benefits earned during the period 6 6 12 12
Interest cost on benefit obligation 4 3 7 7
Expected return on plan assets (6) (7) (12) (14)
Amortization:        
Actuarial losses 0 1 2 2
Prior service cost (1) (1) (2) (2)
Total net plan costs 3 2 7 5
Curtailments and Settlements        
Curtailments and settlements 0   (16)  
Pensions (Non-U.S. Plans)        
Defined Benefit Plan, Net Periodic Benefit Cost        
Service cost - benefits earned during the period 5 4 9 8
Interest cost on benefit obligation 4 6 8 12
Expected return on plan assets (11) (10) (22) (21)
Amortization:        
Actuarial losses 7 6 14 13
Prior service cost 0 0 0 0
Total net plan costs 5 6 9 12
United States Post-retirement Benefit Plan        
Defined Benefit Plan, Net Periodic Benefit Cost        
Service cost - benefits earned during the period 0 1 0 2
Interest cost on benefit obligation 1 1 2 2
Expected return on plan assets (1) (2) (3) (4)
Amortization:        
Actuarial losses 2 1 5 2
Prior service cost (3) (3) (5) (6)
Total net plan costs $ (1) $ (2) $ (1) $ (4)