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STOCKHOLDERS' EQUITY (Tables) | 9 Months Ended
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Jul. 31, 2021
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 July 31, 2021 |  |  |  | Foreign currency translation |  | Prior service credits |  | Actuarial Losses |  | Unrealized gains (losses) on derivatives |  | Total
|  |  |  | (in millions)
As of April 30, 2021 |  |  |  | $ | (150) |  |  | $ | 124 |  |  | $ | (421) |  |  | $ | (5) |  |  | $ | (452) |
Other comprehensive income (loss) before reclassifications |  |  |  | (17) |  |  | — |  |  | (1) |  |  | 1 |  |  | (17) |
Amounts reclassified out of accumulated other comprehensive income (loss) |  |  |  | — |  |  | — |  |  | 15 |  |  | 5 |  |  | 20 |
Tax expense |  |  |  | — |  |  | — |  |  | (3) |  |  | (2) |  |  | (5) |
Other comprehensive income (loss) |  |  |  | (17) |  |  | — |  |  | 11 |  |  | 4 |  |  | (2) |
As of July 31, 2021 |  |  |  | $ | (167) |  |  | $ | 124 |  |  | $ | (410) |  |  | $ | (1) |  |  | $ | (454) |
Nine Months Ended July 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |
As of October 31, 2020 |  |  |  | $ | (194) |  |  | $ | 125 |  |  | $ | (442) |  |  | $ | (11) |  |  | $ | (522) |
Other comprehensive income (loss) before reclassifications |  |  |  | 27 |  |  | — |  |  | (4) |  |  | (5) |  |  | 18 |
Amounts reclassified out of accumulated other comprehensive income (loss) |  |  |  | — |  |  | (1) |  |  | 47 |  |  | 19 |  |  | 65 |
Tax expense |  |  |  | — |  |  | — |  |  | (11) |  |  | (4) |  |  | (15) |
Other comprehensive income (loss) |  |  |  | 27 |  |  | (1) |  |  | 32 |  |  | 10 |  |  | 68 |
As of July 31, 2021 |  |  |  | $ | (167) |  |  | $ | 124 |  |  | $ | (410) |  |  | $ | (1) |  |  | $ | (454) |
Reclassification out of Accumulated Other Comprehensive Income | Reclassifications out of accumulated other comprehensive income (loss) for the three and nine months ended July 31, 2021 and 2020 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 |  | Nine Months Ended |  |
|  | July 31, |  | July 31, |  |
|  | 2021 |  | 2020 |  | 2021 |  | 2020 |  |
Unrealized gain (loss) on derivatives |  | $ | (4) |  |  | $ | 1 |  |  | $ | (18) |  |  | $ | 3 |  |  | Cost of products
|  | (1) |  |  | — |  |  | (1) |  |  | (1) |  |  | Interest expense
|  | (5) |  |  | 1 |  |  | (19) |  |  | 2 |  |  | Total before income tax
|  | 1 |  |  | — |  |  | 5 |  |  | — |  |  | Provision for income tax
|  | (4) |  |  | 1 |  |  | (14) |  |  | 2 |  |  | Total net of income tax
Net defined benefit pension cost and post retirement plan costs: |  |  |  |  |  |  |  |  |  |
Actuarial net loss |  | (15) |  |  | (14) |  |  | (47) |  |  | (42) |  |  |
Prior service benefit |  | — |  |  | 1 |  |  | 1 |  |  | 5 |  |  |
|  | (15) |  |  | (13) |  |  | (46) |  |  | (37) |  |  | Total before income tax
|  | 3 |  |  | 3 |  |  | 11 |  |  | 11 |  |  | Benefit for income tax
|  | (12) |  |  | (10) |  |  | (35) |  |  | (26) |  |  | Total net of income tax
Total reclassifications for the period |  | $ | (16) |  |  | $ | (9) |  |  | $ | (49) |  |  | $ | (24) |  |  |

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