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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Financial Statement Location) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019
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 | (125) | (158)
Net asset (liability) | (126) | (159)
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract] |  |
Actuarial losses | 225 | 179
Prior service cost (credits) | 0 | 0
Total | 225 | 179
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) | 24 |
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 | (28) | (26)
Net asset (liability) | (28) | (26)
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract] |  |
Actuarial losses | 28 | 29
Prior service cost (credits) | (2) | (13)
Total | 26 | 16
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) | (1) |
Amortization of actuarial net loss (gain) | 11 |
Foreign Plan [Member] | Pension Plan [Member] |  |
Amounts recognized in the consolidated balance sheet [Abstract] |  |
Other assets | 311 | 297
Employee compensation and benefits | 0 | 0
Retirement and post-retirement benefits | (187) | (152)
Net asset (liability) | 124 | 145
Amounts Recognized in Accumulated Other Comprehensive Income (loss): [Abstract] |  |
Actuarial losses | 487 | 444
Prior service cost (credits) | 1 | 0
Total | 488 | $ 444
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) | $ 40 |

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- 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 No definition available. + Details
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- Definition 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. + References No definition available. + Details
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