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STOCKHOLDERS' EQUITY (Tables)
 12 Months Ended
Oct. 31, 2019
Statement of Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
The following table summarizes the components of our accumulated other comprehensive loss as of October 31, 2019 and 2018, net of tax effect:
 
October 31,
 
2019
 
2018
 
(in millions)
Unrealized gain on equity securities, net of tax (expense) of zero and $(2)
$
—

 
$
—

Foreign currency translation, net of tax (expense) of $(63) and $(63)
(43
)
 
(60
)
Unrealized losses on defined benefit plans, net of tax benefit of $113 and $81
(532
)
 
(426
)
Unrealized losses on derivative instruments, net of tax (expense) of zero and $(1)
(3
)
 
(2
)
Total accumulated other comprehensive loss
$
(578
)
 
$
(488
)

Changes in accumulated other comprehensive income (loss) by component and related tax effects for the years ended October 31, 2019 and 2018 were as follows:
 
 
 
 
 
Net defined benefit pension cost and post retirement plan costs:
 
 
 
 
 
Unrealized gain (loss) on equity securities
 
Foreign currency translation
 
Actuarial Losses
 
Prior service credits
 
Unrealized gains (losses) on derivatives
 
Total
 
(in millions)
At October 31, 2017
$
14

 
$
(39
)
 
$
(468
)
 
$
35

 
$
1

 
$
(457
)
Other comprehensive income (loss) before reclassifications
(17
)
 
(21
)
 
(23
)
 
—

 
—

 
(61
)
Amounts reclassified out of accumulated other comprehensive income (loss)
—

 
—

 
53

 
(22
)
 
(4
)
 
27

Tax (expense) benefit
3

 
—

 
(7
)
 
6

 
1

 
3

Other comprehensive income (loss) for the twelve months ended October 31, 2018
(14
)
 
(21
)
 
23

 
(16
)
 
(3
)
 
(31
)
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 income (loss)
—

 
—

 
49

 
(19
)
 
3

 
33

Tax (expense) benefit
—

 
—

 
28

 
4

 
1

 
33

Other comprehensive income (loss) for the twelve months ended October 31, 2019
—

 
17

 
(91
)
 
(15
)
 
(1
)
 
(90
)
At October 31, 2019
$
—

 
$
(43
)
 
$
(536
)
 
$
4

 
$
(3
)
 
$
(578
)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive loss for the years ended October 31, 2019 and 2018 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,
 
 
 
 
2019
 
2018
 
 
 
 
(in millions)
 
 
Unrealized gains (losses) on derivatives
 
$
(1
)
 
$
4

 
Cost of products
 
 
(2
)
 
—

 
Selling, general and administrative
 
 
—

 
(1
)
 
Provision for income tax
 
 
(3
)
 
3

 
Net of Income Tax
 
 
 
 
 
 
 
Net defined benefit pension cost and post retirement plan costs:
 
 
 
 
 
 
Net actuarial losses
 
(49
)
 
(53
)
 
 
Prior service credits
 
19

 
22

 
 
 
 
(30
)
 
(31
)
 
Total before income tax
 
 
7

 
9

 
Provision for income tax
 
 
(23
)
 
(22
)
 
Net of income tax
 
 
 
 
 
 
 
Total reclassifications for the period
 
$
(26
)
 
$
(19
)