RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS- Components of net periodic costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
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	4	7	8
Expected return on plan assets	(8)	(7)	(15)	(15)
Amortization:
Actuarial losses	1	1	2	2
Prior service credits	0	0	0	0
Total net plan costs (benefits)	(3)	(2)	(6)	(5)
Pension Plan | Foreign Plan
Defined Benefit Plan, Net Periodic Benefit Cost
Service cost - benefits earned during the period	4	5	11	12
Interest cost on benefit obligation	2	2	4	4
Expected return on plan assets	(13)	(12)	(25)	(24)
Amortization:
Actuarial losses	14	12	27	24
Prior service credits	0	0	0	0
Total net plan costs (benefits)	7	7	17	16
Other Postretirement Benefits 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	1	1	2	2
Expected return on plan assets	(1)	(2)	(3)	(3)
Amortization:
Actuarial losses	1	1	2	2
Prior service credits	(1)	(2)	(1)	(4)
Total net plan costs (benefits)	$ 0	$ (2)	$ 0	$ (3)