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STOCKHOLDER'S EQUITY - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2018 | Jul. 31, 2017
Beginning Balance | $ (310) |  | $ (346) |
Other comprehensive income (loss), before reclassifications | (30) |  | (10) |
Amounts reclassified out of accumulated other comprehensive income (loss) | 9 |  | 29 |
Tax (expense) benefit | (4) |  | (8) |
Other comprehensive income (loss) | (25) | $ 60 | 11 | $ 86
Ending Balance | (335) |  | (335) |
Foreign currency translation |  |  |  |
Beginning balance | (130) |  | (156) |
Other comprehensive income (loss) before reclassifications | (39) |  | (13) |
Amounts reclassified out of accumulated other comprehensive income (loss) | 0 |  | 0 |
Tax (expense) benefit | 0 | (6) | 0 | (6)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax | (39) | 57 | (13) | 61
Ending balance | (169) |  | (169) |
Prior service credits |  |  |  |
Beginning balance | 137 |  | 140 |
Other comprehensive income (loss) before reclassifications | 0 |  | 0 |
Amounts reclassified out of accumulated other comprehensive income (loss) | (2) | (2) | (6) | (7)
Tax (expense) benefit | 1 |  | 2 |
Other comprehensive income (loss) | (1) | (1) | (4) | (4)
Ending balance | 136 |  | 136 |
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Actuarial Gain (Loss), before Tax |  |  |  |
Beginning balance | (315) |  | (328) |
Other comprehensive income (loss) before reclassifications | 1 |  | 0 |
Amounts reclassified out of accumulated other comprehensive income (loss) | 10 | 12 | 29 | 46
Tax (expense) benefit | (3) |  | (8) |
Other comprehensive income (loss) | 8 | $ 8 | 21 | $ 34
Ending balance | (307) |  | (307) |
Unrealized gains (losses) on derivatives |  |  |  |
Beginning balance | (2) |  | (2) |
Other comprehensive income (loss) before reclassifications | 8 |  | 3 |
Amounts reclassified out of accumulated other comprehensive income (loss) | 1 |  | 6 |
Tax (expense) benefit | (2) |  | (2) |
Other comprehensive income (loss) | 7 |  | 7 |
Ending balance | $ 5 |  | $ 5 |

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