RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Pension Plan | United States
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	$ 0	$ 0	$ 0	$ 0
Interest cost on benefit obligation	4	5	12	15
Expected return on plan assets	(7)	(7)	(22)	(21)
Amortization:
Actuarial losses	0	0	2	0
Prior service credits	0	0	0	0
Total net plan costs (benefits)	(3)	(2)	(8)	(6)
Pension Plan | Foreign Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	6	6	18	16
Interest cost on benefit obligation	2	3	6	9
Expected return on plan assets	(11)	(11)	(35)	(33)
Amortization:
Actuarial losses	12	9	36	27
Prior service credits	0	0	0	0
Total net plan costs (benefits)	9	7	25	19
Other Postretirement Benefits Plan | United States
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	1	0	1	0
Interest cost on benefit obligation	0	1	2	2
Expected return on plan assets	(2)	(1)	(5)	(3)
Amortization:
Actuarial losses	1	1	3	3
Prior service credits	(1)	(2)	(5)	(6)
Total net plan costs (benefits)	$ (1)	$ (1)	$ (4)	$ (4)