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STOCKHOLDERS' EQUITY (Tables) | 6 Months Ended
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Apr. 30, 2019
Schedule of Accumulated Other Comprehensive Income (Loss) | Changes in accumulated other comprehensive income (loss) by component and related tax effects were as follows (in millions):
|  |  |  | Net defined benefit pension cost and post retirement plan costs |  |  |  |
Three Months Ended April 30, 2019 |  | Foreign currency translation |  | Prior service credits |  | Actuarial Losses |  | Unrealized gains (losses) on derivatives |  | Total
|  | (in millions)
As of January 31, 2019 |  | $ | (176 | ) |  | $ | 135 |  |  | $ | (338 | ) |  | $ | (2 | ) |  | $ | (381 | )
Other comprehensive income (loss) before reclassifications |  | (25 | ) |  | — |  |  | (2 | ) |  | 4 |  |  | (23 | )
Amounts reclassified out of accumulated other comprehensive income (loss) |  | — |  |  | (2 | ) |  | 10 |  |  | — |  |  | 8 |
Tax (expense) benefit |  | — |  |  | 1 |  |  | (2 | ) |  | (1 | ) |  | (2 | )
Other comprehensive income (loss) |  | (25 | ) |  | (1 | ) |  | 6 |  |  | 3 |  |  | (17 | )
As of April 30, 2019 |  | $ | (201 | ) |  | $ | 134 |  |  | $ | (332 | ) |  | $ | 1 |  |  | $ | (398 | )
Six Months Ended April 30, 2019 |  |  |  |  |  |  |  |  |  |
As of October 31, 2018 |  | $ | (214 | ) |  | $ | 134 |  |  | $ | (335 | ) |  | $ | 7 |  |  | $ | (408 | )
Impact of adoption of new guidance on tax effects in accumulated other comprehensive income (loss) |  | — |  |  | 3 |  |  | (9 | ) |  | (1 | ) |  | (7 | )
|  | (214 | ) |  | 137 |  |  | (344 | ) |  | 6 |  |  | (415 | )
Other comprehensive income (loss) before reclassifications |  | 4 |  |  | — |  |  | (2 | ) |  | (2 | ) |  | — |
Amounts reclassified out of accumulated other comprehensive income (loss) |  | — |  |  | (4 | ) |  | 20 |  |  | (5 | ) |  | 11 |
Tax (expense) benefit |  | 9 |  |  | 1 |  |  | (6 | ) |  | 2 |  |  | 6 |
Other comprehensive income (loss) |  | 13 |  |  | (3 | ) |  | 12 |  |  | (5 | ) |  | 17 |
As of April 30, 2019 |  | $ | (201 | ) |  | $ | 134 |  |  | $ | (332 | ) |  | $ | 1 |  |  | $ | (398 | )
Reclassification out of Accumulated Other Comprehensive Income | Reclassifications out of accumulated other comprehensive income (loss) for the three and six months ended April 30, 2019 and 2018 were as follows (in millions):
Details about accumulated other comprehensive income (loss) components |  | Amounts Reclassified from other comprehensive income (loss) |  | Affected line item in statement of operations
|  | Three Months Ended |  | Six Months Ended |  |
|  | April 30, |  | April 30, |  |
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  |
Unrealized gain (loss) on derivatives |  | $ | — |  |  | $ | (5 | ) |  | $ | 5 |  |  | $ | (5 | ) |  | Cost of products
|  | — |  |  | (5 | ) |  | 5 |  |  | (5 | ) |  | Total before income tax
|  | — |  |  | 2 |  |  | (1 | ) |  | 2 |  |  | (Provision) benefit for income tax
|  | — |  |  | (3 | ) |  | 4 |  |  | (3 | ) |  | Total net of income tax
Net defined benefit pension cost and post retirement plan costs: |  |  |  |  |  |  |  |  |  |
Actuarial net loss |  | (10 | ) |  | (10 | ) |  | (20 | ) |  | (19 | ) |  |
Prior service benefit |  | 2 |  |  | 2 |  |  | 4 |  |  | 4 |  |  |
|  | (8 | ) |  | (8 | ) |  | (16 | ) |  | (15 | ) |  | Total before income tax
|  | 1 |  |  | 3 |  |  | 5 |  |  | 4 |  |  | Benefit for income tax
|  | (7 | ) |  | (5 | ) |  | (11 | ) |  | (11 | ) |  | Total net of income tax
Total reclassifications for the period |  | $ | (7 | ) |  | $ | (8 | ) |  | $ | (7 | ) |  | $ | (14 | ) |  |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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