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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (By Fair Value Hierarchy) (Details) - USD ($) $ in Millions | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2017
--- | --- | --- | ---
UNITED STATES | Pension Plan [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | $ 722 | $ 615 | $ 575
Other assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 110 | 14 |
UNITED STATES | Pension Plan [Member] | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 443 | 428 |
UNITED STATES | Pension Plan [Member] | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 169 | 173 |
UNITED STATES | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 133 | 144 |
UNITED STATES | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 124 | 130 |
UNITED STATES | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 9 | 14 |
UNITED STATES | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 211 | 116 |
UNITED STATES | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 110 | 14 |
UNITED STATES | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 1 | 1 |
UNITED STATES | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 100 | 101 |
UNITED STATES | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Cash and cash equivalents at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Equity at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 318 | 297 |
UNITED STATES | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Fixed Income securities at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 60 | 58 |
UNITED STATES | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Total assets at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 378 | 355 |
UNITED STATES | Other Postretirement Benefits Plan [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 175 | 176 | 172
Other assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 4 | 5 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 123 | 121 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 48 | 50 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 37 | 41 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 34 | 37 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 3 | 4 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 32 | 34 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 4 | 5 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Other Observable Inputs (Level 2) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 28 | 29 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Cash and cash equivalents at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Equity at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 89 | 84 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Fixed Income securities at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 17 | 17 |
UNITED STATES | Other Postretirement Benefits Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Total assets at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 106 | 101 |
Foreign Plan [Member] | Pension Plan [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 1,545 | 1,538 | 1,392
Other assets | 311 | 297 |
Foreign Plan [Member] | Pension Plan [Member] | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 452 | 659 |
Foreign Plan [Member] | Pension Plan [Member] | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 1,093 | 879 |
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 150 | 153 |
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 150 | 153 |
Foreign Plan [Member] | Pension Plan [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 221 | 202 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Other Observable Inputs (Level 2) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 221 | 202 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 | $ 3
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Cash and cash equivalents |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Equity |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Significant Unobservable Inputs (Level 3) | Fixed income |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Cash and cash equivalents at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 0 | 0 |
Foreign Plan [Member] | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Equity at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 302 | 506 |
Foreign Plan [Member] | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Fixed Income securities at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | 872 | 677 |
Foreign Plan [Member] | Pension Plan [Member] | Fair Value Measured at Net Asset Value Per Share | Total assets at NAV [Member] |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Fair value of plan assets | $ 1,174 | $ 1,183 |

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