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STOCKHOLDERS' EQUITY (Tables)
 6 Months Ended
Apr. 30, 2019
Statement of Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive loss by component and related tax effects for the three and six months ended April 30, 2019 and 2018 were as follows:
 
 
Unrealized gain (loss) on investments
 
Foreign currency translation
 
Net defined benefit pension cost and post retirement plan costs
 
Unrealized gains (losses) on derivatives
 
Total
 
 
 
 
Actuarial losses
 
Prior service credits
 
 
 
 
(in millions)
As of January 31, 2019
 
$
—

 
$
(30
)
 
$
(432
)
 
$
16

 
$
(3
)
 
$
(449
)
Other comprehensive income (loss) before reclassifications
 
—

 
(16
)
 
—

 
—

 
—

 
(16
)
Amounts reclassified out of accumulated other comprehensive loss
 
—

 
—

 
12

 
(5
)
 
—

 
7

Tax (expense) benefit
 
—

 
—

 
(4
)
 
1

 
—

 
(3
)
Other comprehensive income (loss)
 
—

 
(16
)
 
8

 
(4
)
 
—

 
(12
)
As of April 30, 2019
 
$
—

 
$
(46
)
 
$
(424
)
 
$
12

 
$
(3
)
 
$
(461
)
 
 
 
 
 
 
 
 
 
 
 
 
 
As of October 31, 2018
 
$
—

 
$
(60
)
 
$
(445
)
 
$
19

 
$
(2
)
 
$
(488
)
Other comprehensive income (loss) before reclassifications
 
—

 
14

 
2

 
—

 
(2
)
 
14

Amounts reclassified out of accumulated other comprehensive loss
 
—

 
—

 
26

 
(9
)
 
1

 
18

Tax (expense) benefit
 
—

 
—

 
(7
)
 
2

 
—

 
(5
)
Other comprehensive income (loss)
 
—

 
14

 
21

 
(7
)
 
(1
)
 
27

As of April 30, 2019
 
$
—

 
$
(46
)
 
$
(424
)
 
$
12

 
$
(3
)
 
$
(461
)
 
 
 
 
 
 
 
 
 
 
 
 
 
As of January 31, 2018
 
$
12

 
$
2

 
$
(458
)
 
$
31

 
$
1

 
$
(412
)
Other comprehensive income (loss) before reclassifications
 
(1
)
 
(13
)
 
1

 
—

 
—

 
(13
)
Amounts reclassified out of accumulated other comprehensive loss
 
—

 
—

 
14

 
(6
)
 
(1
)
 
7

Tax (expense) benefit
 
1

 
—

 
(4
)
 
2

 
—

 
(1
)
Other comprehensive income (loss)
 
—

 
(13
)
 
11

 
(4
)
 
(1
)
 
(7
)
As of April 30, 2018
 
$
12

 
$
(11
)
 
$
(447
)
 
$
27

 
$
—

 
$
(419
)
 
 
 
 
 
 
 
 
 
 
 
 
 
As of October 31, 2017
 
$
14

 
$
(39
)
 
$
(468
)
 
$
35

 
$
1

 
$
(457
)
Other comprehensive income (loss) before reclassifications
 
(3
)
 
28

 
1

 
—

 
2

 
28

Amounts reclassified out of accumulated other comprehensive loss
 
—

 
—

 
27

 
(11
)
 
(3
)
 
13

Tax (expense) benefit
 
1

 
—

 
(7
)
 
3

 
—

 
(3
)
Other comprehensive income (loss)
 
(2
)
 
28

 
21

 
(8
)
 
(1
)
 
38

As of April 30, 2018
 
$
12

 
$
(11
)
 
$
(447
)
 
$
27

 
$
—

 
$
(419
)
Reclassification out of Accumulated Other Comprehensive Income
Reclassifications out of accumulated other comprehensive loss for the three and six months ended April 30, 2019 and 2018 were as follows:
Details about Accumulated Other Comprehensive Loss Components
 
 
 
 
 
Affected Line Item in Statement of Operations
 
 
Three Months Ended
 
Six Months Ended
 
 
 
 
April 30,
 
April 30,
 
 
 
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
Unrealized gain (loss) on derivatives
 
$
—

 
$
1

 
$
—

 
$
3

 
Cost of products
 
 
—

 
—

 
(1
)
 
—

 
Selling, general and administrative
 
 
—

 
—

 
—

 
—

 
Provision for income taxes
 
 
—

 
1

 
(1
)
 
3

 
Net of income tax
 
 
 
 
 
 
 
 
 
 
 
Net defined benefit pension cost and post retirement plan costs:
 
 
 
 
 
 
 
 
 
 
  Actuarial net loss
 
(12
)
 
(14
)
 
(26
)
 
(27
)
 
 
  Prior service credits
 
5

 
6

 
9

 
11

 
 
 
 
(7
)
 
(8
)
 
(17
)
 
(16
)
 
Total before income tax
 
 
3

 
2

 
4

 
4

 
Provision for income taxes
 
 
(4
)
 
(6
)
 
(13
)
 
(12
)
 
Net of income tax
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications for the period
 
$
(4
)
 
$
(5
)
 
$
(14
)
 
$
(9
)