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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Financial Statement Location) (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
UNITED STATES | Pension Plan [Member]
Amounts recognized in the consolidated balance sheet [Abstract]
Other assets	$ 0	$ 0
Employee compensation and benefits	(1)	(1)
Retirement and post-retirement benefits	(158)	(74)
Net asset (liability)	(159)	(75)
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract]
Actuarial losses	179	112
Prior service cost (credits)	0	(4)
Total	179	108
Accumulated other comprehensive income expected to be recognized as components of net expense during the next fiscal year [Abstract]
Amortization of net prior service cost (benefit)	0
Amortization of actuarial net loss (gain)	19
UNITED STATES | Other Postretirement Benefits Plan [Member]
Amounts recognized in the consolidated balance sheet [Abstract]
Other assets	0	0
Employee compensation and benefits	0	0
Retirement and post-retirement benefits	(26)	(18)
Net asset (liability)	(26)	(18)
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract]
Actuarial losses	29	28
Prior service cost (credits)	(13)	(28)
Total	16	0
Accumulated other comprehensive income expected to be recognized as components of net expense during the next fiscal year [Abstract]
Amortization of net prior service cost (benefit)	(11)
Amortization of actuarial net loss (gain)	10
Foreign Plan [Member] | Pension Plan [Member]
Amounts recognized in the consolidated balance sheet [Abstract]
Other assets	297	257
Employee compensation and benefits	0	0
Retirement and post-retirement benefits	(152)	(114)
Net asset (liability)	145	143
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract]
Actuarial losses	444	396
Prior service cost (credits)	0	(1)
Total	444	$ 395
Accumulated other comprehensive income expected to be recognized as components of net expense during the next fiscal year [Abstract]
Amortization of net prior service cost (benefit)	0
Amortization of actuarial net loss (gain)	$ 34

X

- Definition

The amounts in accumulated other comprehensive income related to actuarial gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References

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The net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan, recognized in other comprehensive income.

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For a classified balance sheet, the amount recognized in balance sheet as employee compensation and benefits in the liability section associated with an underfunded defined benefit plan.

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Amount, before tax, after reclassification adjustment, of (increase) decrease in accumulated other comprehensive income from prior service cost (credit) of defined benefit plan.

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Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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