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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Contributions) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
United States | Defined benefit plan
Defined Benefit Plan Disclosure
Contributions by employer	$ 0	$ 0	$ 0	$ 0
United States | Post-retirement Benefits Plan
Defined Benefit Plan Disclosure
Contributions by employer	0	0	0	0
Non-US | Defined benefit plan
Defined Benefit Plan Disclosure
Contributions by employer	2	$ 6	6	$ 21
Estimated future employer contributions in remainder of current fiscal year	$ 2		$ 2

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

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