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STOCKHOLDERS' EQUITY (Tables) | 12 Months Ended
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Oct. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Accumulated other comprehensive income | The following table summarizes the components of our accumulated other comprehensive income (loss) as of October 31, 2020 and 2019, net of tax effect:
| October 31,
| 2020 |  | 2019
| (in millions)
Foreign currency translation, net of tax expense of $(6) and $(5) for 2020 and 2019, respectively | $ | (194) |  |  | (204) |
Unrealized losses (including prior service benefit) on defined benefit plans, net of tax benefit of $154 and $153 for 2020 and 2019, respectively | (317) |  |  | (306) |
Unrealized gains (losses) on derivative instruments, net of tax benefit of $6 and $3 for 2020 and 2019, respectively | (11) |  |  | (4) |
Total accumulated other comprehensive loss | $ | (522) |  |  | $ | (514) |
Changes in accumulated other comprehensive income (loss) by component and related tax effects for the years ended October 31, 2020 and 2019 were as follows:
|  |  |  |  |  | Net defined benefit pension cost and post retirement plan costs |  |  |  |
|  |  |  | Foreign currency translation |  | Prior service credits |  | Actuarial Losses |  | Unrealized gains (losses) on derivatives |  | Total
|  |  |  | (in millions)
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) |
As of November 1, 2018 |  |  |  | (214) |  |  | 137 |  |  | (344) |  |  | 6 |  |  | (415) |
Other comprehensive loss before reclassifications |  |  |  | — |  |  | — |  |  | (157) |  |  | (6) |  |  | (163) |
Amounts reclassified out of accumulated other comprehensive income (loss) |  |  |  | — |  |  | (8) |  |  | 39 |  |  | (8) |  |  | 23 |
Tax benefit |  |  |  | 10 |  |  | 2 |  |  | 25 |  |  | 4 |  |  | 41 |
Other comprehensive income (loss) |  |  |  | 10 |  |  | (6) |  |  | (93) |  |  | (10) |  |  | (99) |
As of October 31, 2019 |  |  |  | $ | (204) |  |  | $ | 131 |  |  | $ | (437) |  |  | $ | (4) |  |  | $ | (514) |
Other comprehensive income (loss) before reclassifications |  |  |  | 11 |  |  | — |  |  | (66) |  |  | (12) |  |  | (67) |
Amounts reclassified out of accumulated other comprehensive income (loss) |  |  |  | — |  |  | (7) |  |  | 61 |  |  | 2 |  |  | 56 |
Tax (expense) benefit |  |  |  | (1) |  |  | 1 |  |  | — |  |  | 3 |  |  | 3 |
Other comprehensive income (loss) |  |  |  | 10 |  |  | (6) |  |  | (5) |  |  | (7) |  |  | (8) |
As of October 31, 2020 |  |  |  | $ | (194) |  |  | $ | 125 |  |  | $ | (442) |  |  | $ | (11) |  |  | $ | (522) |
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | Reclassifications out of accumulated other comprehensive income (loss) for the years ended October 31, 2020 and 2019 were as follows (in millions):
Details about Accumulated Other Comprehensive Income components |  | Amounts Reclassified from Other Comprehensive Income |  | Affected line item in statement of operations
|  | 2020 |  | 2019 |  |
Unrealized gains and (losses) on derivatives |  | $ | (2) |  |  | $ | 8 |  |  | Cost of products and interest expense
|  | (2) |  |  | 8 |  |  | Total before income tax
|  | — |  |  | (2) |  |  | (Provision)/benefit for income tax
|  | (2) |  |  | 6 |  |  | Total net of income tax
Net defined benefit pension cost and post retirement plan costs: |  |  |  |  |  |
Actuarial net loss |  | (61) |  |  | (39) |  |  | Other (income) expense
Prior service benefit |  | 7 |  |  | 8 |  |  | Other (income) expense
|  | (54) |  |  | (31) |  |  | Total before income tax
|  | 16 |  |  | 12 |  |  | Benefit for income tax
|  | (38) |  |  | (19) |  |  | Total net of income tax
Total reclassifications for the period |  | $ | (40) |  |  | $ | (13) |  |  |

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