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INCOME TAXES (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 30, 2016 | Apr. 30, 2015 | Apr. 30, 2016 | Apr. 30, 2015 | Jan. 31, 2015
Income Tax Disclosure |  |  |  |  |
Effective Income Tax Rate, Percent | 22.20% | 4.20% | 17.40% | 11.50% |
Income Tax Expense (Benefit) | $ 26 | $ 4 | $ 45 | $ 24 |
Net Discrete Tax Expense (Benefit) | 3 | (13) | (3) | (16) |
Income Taxes Paid |  |  | 9 |  |
Prepaid Taxes |  |  |  |  | $ 3
Internal Revenue Service |  |  |  |  |
Incremental taxes |  |  |  |  | $ 12
Internal Revenue Service (IRS) |  |  |  |  |
Internal Revenue Service |  |  |  |  |
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions |  |  |  | 119 |
Tax liability on foreign earnings distributions |  |  |  | 99 |
U.S. Research & Development Tax Credit Extension |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) |  |  | (5) | (6) |
Pension Curtailment |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) |  |  | 6 |  |
Return To Provision Adjustment |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) | 7 |  | (9) |  |
Realization of tax credits [Member] |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) | (8) |  |  |  |
Miscellaneous Other Return To Provision Adjustment [Member] [Member] |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) | 2 |  |  |  |
Other Discrete Items |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) | 2 | 3 | $ 2 | $ 3 |
De-registration of certain foreign branches [Member] |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) |  | $ (16) |  |  |
Out of Period related to Tax Year 2006 | Return To Provision Adjustment |  |  |  |  |
Income Tax Disclosure |  |  |  |  |
Discrete Tax Expense (Benefit) | $ 5 |  |  |  |

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