RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Pension Plan | United States
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	$ 0	$ 0
Interest cost on benefit obligation	4	5
Expected return on plan assets	(8)	(7)
Amortization:
Actuarial losses	1	0
Prior service credits	0	0
Total net plan costs	(3)	(2)
Pension Plan | Foreign Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	7	6
Interest cost on benefit obligation	2	3
Expected return on plan assets	(12)	(11)
Amortization:
Actuarial losses	12	9
Prior service credits	0	0
Total net plan costs	9	7
Other Postretirement Benefits Plan | United States
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	0	0
Interest cost on benefit obligation	1	0
Expected return on plan assets	(1)	(1)
Amortization:
Actuarial losses	1	1
Prior service credits	(2)	(2)
Total net plan costs	$ (1)	$ (2)