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STOCKHOLDERS' EQUITY (Tables)
 12 Months Ended
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,
 20202019
 (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 translationPrior service creditsActuarial LossesUnrealized gains (losses) on derivativesTotal
(in millions)
As of October 31, 2018$(214)$134 $(335)$7 $(408)
Impact of adoption of new guidance on tax effects in accumulated other comprehensive income (loss)— 3 (9)(1)(7)
As of November 1, 2018(214)137 (344)6 (415)
Other comprehensive loss before reclassifications— — (157)(6)(163)
Amounts reclassified out of accumulated other comprehensive income (loss)— (8)39 (8)23 
Tax benefit10 2 25 4 41 
Other comprehensive income (loss)10 (6)(93)(10)(99)
As of October 31, 2019$(204)$131 $(437)$(4)$(514)
Other comprehensive income (loss) before reclassifications11 — (66)(12)(67)
Amounts reclassified out of accumulated other comprehensive income (loss)— (7)61 2 56 
Tax (expense) benefit(1)1 — 3 3 
Other comprehensive income (loss)10 (6)(5)(7)(8)
As of October 31, 2020$(194)$125 $(442)$(11)$(522)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
Reclassifications out of accumulated other comprehensive income (loss) for the years ended October 31, 2020 and 2019 were as follows (in millions):
Details about Accumulated Other
Comprehensive Income components		Amounts Reclassified
from Other Comprehensive Income		Affected line item in
statement of operations
20202019
Unrealized gains and (losses) on derivatives$(2)$8 Cost of products and interest expense
(2)8 Total before income tax
— (2)(Provision)/benefit for income tax
(2)6 Total net of income tax
Net defined benefit pension cost and post retirement plan costs:
Actuarial net loss(61)(39)Other (income) expense
Prior service benefit7 8 Other (income) expense
(54)(31)Total before income tax
16 12 Benefit for income tax
(38)(19)Total net of income tax
Total reclassifications for the period$(40)$(13)