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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Components) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
UNITED STATES | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Actuarial Gain Loss Before Tax | $ 225 | $ 179 |
Pension And Other Postretirement Defined Benefit Plans Employee Compensation and Benefits | (1) | (1) |
Net periodic benefit cost (benefit) [Abstract] |  |  |
Service cost — benefits earned during the period | 23 | 20 | $ 24
Interest cost on benefit obligation | 24 | 28 | 25
Expected return on plan assets | (44) | (41) | (37)
Net actuarial loss | 18 | 10 | 12
Prior service credit | 0 | (4) | (7)
Net periodic benefit cost (benefit) | 21 | 13 | 17
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 0
Total periodic benefit cost (benefit) | 21 | 13 | 17
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss [Abstract] |  |  |
Net actuarial loss (gain) | 64 | 77 | (11)
Net actuarial loss | (18) | (10) | (12)
Prior service credit | 0 | 4 | 7
Curtailments and settlements | 0 | 0 | 0
Foreign currency | 0 | 0 | 0
Total recognized in other comprehensive (income) loss | 46 | 71 | (16)
Total recognized in the periodic benefit cost (benefit) and other comprehensive (income) loss | 67 | 84 | 1
Change in fair value of plan assets: [Roll Forward] |  |  |
Fair value — beginning of year | 615 |  | 575
Actual return on plan assets | 41 | 64 |
Employer contributions | 100 | 0 |
Defined Benefit Plan, Plan Assets, Payment for Settlement | 0 | 0 |
Defined Benefit Plan, Plan Assets, Benefits Paid | (34) | (24) |
Defined Benefit Plan, Plan Assets, Other | 0 | 0 |
Currency impact | 0 | 0 |
Fair value — end of year | 722 | 615 |
Change in benefit obligation: [Roll Forward] |  |  |
Benefit obligation — beginning of year | 774 |  | 650
Service cost | 23 | 20 |
Interest cost | 24 | 28 | 25
Settlements | 0 | 0 |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment | 0 | 0 |
Actuarial loss (gain) | 62 | (101) |
Benefits paid | (35) | (25) |
Defined Benefit Plan, Benefit Obligation, Other | 0 | 0 |
Currency impact | 0 | 0 |
Benefit obligation — end of year | 848 | 774 |
Funded status of plan [Abstract] |  |  |
Overfunded (Underfunded) status of PBO | (126) | (159) |
Other assets | 0 | 0 |
Liability, Defined Benefit Plan | (125) | (158) |
UNITED STATES | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Actuarial Gain Loss Before Tax | 28 | 29 |
Pension And Other Postretirement Defined Benefit Plans Employee Compensation and Benefits | 0 | 0 |
Net periodic benefit cost (benefit) [Abstract] |  |  |
Service cost — benefits earned during the period | 1 | 1 | 1
Interest cost on benefit obligation | 6 | 8 | 7
Expected return on plan assets | (13) | (13) | (13)
Net actuarial loss | 10 | 9 | 16
Prior service credit | (11) | (14) | (14)
Net periodic benefit cost (benefit) | (7) | (9) | (3)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 0 | 0 | 0
Total periodic benefit cost (benefit) | (7) | (9) | (3)
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss [Abstract] |  |  |
Net actuarial loss (gain) | 9 | 11 | (1)
Net actuarial loss | (10) | (9) | (16)
Prior service credit | 11 | 14 | 14
Curtailments and settlements | 0 | 0 | 0
Foreign currency | 0 | 0 | 0
Total recognized in other comprehensive (income) loss | 10 | 16 | (3)
Total recognized in the periodic benefit cost (benefit) and other comprehensive (income) loss | 3 | 7 | (6)
Change in fair value of plan assets: [Roll Forward] |  |  |
Fair value — beginning of year | 176 |  | 172
Actual return on plan assets | 12 | 18 |
Employer contributions | 0 | 0 |
Defined Benefit Plan, Plan Assets, Payment for Settlement | 0 | 0 |
Defined Benefit Plan, Plan Assets, Benefits Paid | (13) | (14) |
Defined Benefit Plan, Plan Assets, Other | 0 | 0 |
Currency impact | 0 | 0 |
Fair value — end of year | 175 | 176 |
Change in benefit obligation: [Roll Forward] |  |  |
Benefit obligation — beginning of year | 202 |  | 190
Service cost | 1 | 1 |
Interest cost | 6 | 8 | 7
Settlements | 0 | 0 |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment | 0 | 0 |
Actuarial loss (gain) | 7 | (17) |
Benefits paid | (13) | (14) |
Defined Benefit Plan, Benefit Obligation, Other | 0 | 0 |
Currency impact | 0 | 0 |
Benefit obligation — end of year | 203 | 202 |
Funded status of plan [Abstract] |  |  |
Overfunded (Underfunded) status of PBO | (28) | (26) |
Other assets | 0 | 0 |
Liability, Defined Benefit Plan | (28) | (26) |
Foreign Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Benefit Plan Amounts Recognized In Other Comprehensive Income Net Actuarial Gain Loss Before Tax | 487 | 444 |
Pension And Other Postretirement Defined Benefit Plans Employee Compensation and Benefits | 0 | 0 |
Net periodic benefit cost (benefit) [Abstract] |  |  |
Service cost — benefits earned during the period | 15 | 14 | 14
Interest cost on benefit obligation | 16 | 23 | 23
Expected return on plan assets | (84) | (77) | (85)
Net actuarial loss | 34 | 27 | 25
Prior service credit | 0 | (1) | (1)
Net periodic benefit cost (benefit) | (19) | (14) | (24)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment | 4 | 2 | 1
Total periodic benefit cost (benefit) | (15) | (12) | (23)
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss [Abstract] |  |  |
Net actuarial loss (gain) | 81 | 78 | 41
Net actuarial loss | (34) | (27) | (25)
Prior service credit | 0 | 1 | 1
Curtailments and settlements | (4) | (2) | (1)
Foreign currency | 1 | (1) | (5)
Total recognized in other comprehensive (income) loss | 44 | 49 | 11
Total recognized in the periodic benefit cost (benefit) and other comprehensive (income) loss | 29 | 37 | (12)
Change in fair value of plan assets: [Roll Forward] |  |  |
Fair value — beginning of year | 1,538 |  | 1,392
Actual return on plan assets | 21 | 167 |
Employer contributions | 10 | 26 |
Defined Benefit Plan, Plan Assets, Payment for Settlement | (14) | (25) |
Defined Benefit Plan, Plan Assets, Benefits Paid | (36) | (43) |
Defined Benefit Plan, Plan Assets, Other | 0 | (4) |
Currency impact | 26 | 25 |
Fair value — end of year | 1,545 | 1,538 |
Change in benefit obligation: [Roll Forward] |  |  |
Benefit obligation — beginning of year | 1,393 |  | 1,249
Service cost | 15 | 14 |
Interest cost | 16 | 23 | $ 23
Settlements | 14 | 25 |
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment | (1) | 0 |
Actuarial loss (gain) | 18 | 169 |
Benefits paid | (36) | (43) |
Defined Benefit Plan, Benefit Obligation, Other | 0 | (8) |
Currency impact | 30 | 14 |
Benefit obligation — end of year | 1,421 | 1,393 |
Funded status of plan [Abstract] |  |  |
Overfunded (Underfunded) status of PBO | 124 | 145 |
Other assets | 311 | 297 |
Liability, Defined Benefit Plan | $ (187) | $ (152) |

X
- Definition Actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit for service obligations attributed to employee during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. + 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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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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