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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Oct. 31, 2020
Statement of Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table summarizes the components of accumulated other comprehensive loss, net of tax effect:
| October 31,
| 2020 |  | 2019
| (in millions)
Foreign currency translation, net of tax (expense) of $(63) and $(63) | $ | (10 | ) |  | $ | (43 | )
Unrealized losses on defined benefit plans, net of tax benefit of $139 and $113 | (605 | ) |  | (532 | )
Unrealized gains (losses) on derivative instruments, net of tax (expense) of $(5) and zero | 16 |  |  | (3 | )
Total accumulated other comprehensive loss | $ | (599 | ) |  | $ | (578 | )
Changes in accumulated other comprehensive loss by component and related tax effects were as follows:
|  |  | Net defined benefit pension cost and post retirement plan costs: |  |  |  |
| Foreign currency translation |  | Actuarial Losses |  | Prior service credits |  | Unrealized gains (losses) on derivatives |  | Total
| (in millions)
At October 31, 2018 | $ | (60 | ) |  | $ | (445 | ) |  | $ | 19 |  |  | $ | (2 | ) |  | $ | (488 | )
Other comprehensive income (loss) before reclassifications | 17 |  |  | (168 | ) |  | — |  |  | (5 | ) |  | (156 | )
Amounts reclassified out of accumulated other comprehensive gain (loss) | — |  |  | 49 |  |  | (19 | ) |  | 3 |  |  | 33 |
Tax benefit (expense) | — |  |  | 28 |  |  | 4 |  |  | 1 |  |  | 33 |
Other comprehensive income (loss) | 17 |  |  | (91 | ) |  | (15 | ) |  | (1 | ) |  | (90 | )
At October 31, 2019 | (43 | ) |  | (536 | ) |  | 4 |  |  | (3 | ) |  | (578 | )
Other comprehensive income (loss) before reclassifications | 33 |  |  | (155 | ) |  | — |  |  | 20 |  |  | (102 | )
Amounts reclassified out of accumulated other comprehensive gain (loss) | — |  |  | 68 |  |  | (12 | ) |  | 4 |  |  | 60 |
Tax benefit (expense) | — |  |  | 23 |  |  | 3 |  |  | (5 | ) |  | 21 |
Other comprehensive income (loss) | 33 |  |  | (64 | ) |  | (9 | ) |  | 19 |  |  | (21 | )
At October 31, 2020 | $ | (10 | ) |  | $ | (600 | ) |  | $ | (5 | ) |  | $ | 16 |  |  | $ | (599 | )
Reclassification out of Accumulated Other Comprehensive Income | Reclassifications out of accumulated other comprehensive loss were as follows:
Details about accumulated other comprehensive loss components |  | Amounts reclassified from other comprehensive loss |  | Affected line item in statement of operations
|  | Year Ended October 31, |  |
|  | 2020 |  | 2019 |  |
|  | (in millions) |  |
Unrealized gain (loss) on derivatives |  | $ | (3 | ) |  | $ | (1 | ) |  | Cost of products
|  | (1 | ) |  | (2 | ) |  | Selling, general and administrative
|  | 1 |  |  | — |  |  | Benefit (provision) for income tax
|  | (3 | ) |  | (3 | ) |  | Net of Income Tax
Net defined benefit pension cost and post retirement plan costs: |  |  |  |  |  |
Net actuarial losses |  | (68 | ) |  | (49 | ) |  |
Prior service credits |  | 12 |  |  | 19 |  |  |
|  | (56 | ) |  | (30 | ) |  | Total before income tax
|  | 10 |  |  | 7 |  |  | Benefit (provision) for income tax
|  | (46 | ) |  | (23 | ) |  | Net of income tax
Total reclassifications for the period |  | $ | (49 | ) |  | $ | (26 | ) |  |

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