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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Details) (Textual) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
US | Defined benefit plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Contributions by employer | $ 0 | $ 0 | $ 0 | $ 0
Estimated future employer contributions in remainder of current fiscal year | 0 |  | 0 |
US | Post-retirement Benefits Plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Contributions by employer | 0 | 0 | 0 | 0
Non-US | Defined benefit plan |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Contributions by employer | 7 | $ 7 | 15 | $ 16
Estimated future employer contributions in remainder of current fiscal year | $ 15 |  | $ 15 |

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