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STOCKHOLDERS' EQUITY (Tables) | 9 Months Ended
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Jul. 31, 2016 | Jul. 31, 2015
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 nine months ended July 31, 2016 and 2015 were as follows:
|  |  |  |  |  | Net defined benefit pension cost and post retirement plan costs |  |  |  |
|  | Unrealized gain on investments |  | Foreign currency translation |  | Actuarial losses |  | Prior service costs |  | Unrealized gains (losses) on derivatives |  | Total
|  | (in millions)
As of April 30, 2016 |  | $ | 14 |  |  | $ | (17 | ) |  | $ | (489 | ) |  | $ | 57 |  |  | $ | (2 | ) |  | $ | (437 | )
Other comprehensive income (loss) before reclassifications |  | 1 |  |  | (1 | ) |  | — |  |  | — |  |  | (5 | ) |  | (5 | )
Amounts reclassified out of accumulated other comprehensive loss |  | — |  |  | — |  |  | 14 |  |  | (6 | ) |  | 2 |  |  | 10 |
Tax (expense) benefit |  | 1 |  |  | — |  |  | (5 | ) |  | 2 |  |  | 1 |  |  | (1 | )
Other comprehensive income (loss) |  | 2 |  |  | (1 | ) |  | 9 |  |  | (4 | ) |  | (2 | ) |  | 4 |
As of July 31, 2016 |  | $ | 16 |  |  | $ | (18 | ) |  | $ | (480 | ) |  | $ | 53 |  |  | $ | (4 | ) |  | $ | (433 | )
As of October 31, 2015 |  | $ | 21 |  |  | $ | (48 | ) |  | $ | (511 | ) |  | $ | 65 |  |  | $ | (6 | ) |  | $ | (479 | )
Other comprehensive income (loss) before reclassifications |  | (7 | ) |  | 30 |  |  | 4 |  |  | — |  |  | (6 | ) |  | 21 |
Amounts reclassified out of accumulated other comprehensive loss |  | — |  |  | — |  |  | 42 |  |  | (19 | ) |  | 9 |  |  | 32 |
Tax (expense) benefit |  | 2 |  |  | — |  |  | (15 | ) |  | 7 |  |  | (1 | ) |  | (7 | )
Other comprehensive income (loss) |  | (5 | ) |  | 30 |  |  | 31 |  |  | (12 | ) |  | 2 |  |  | 46 |
As of July 31, 2016 |  | $ | 16 |  |  | $ | (18 | ) |  | $ | (480 | ) |  | $ | 53 |  |  | $ | (4 | ) |  | $ | (433 | )
|  |  |  |  |  | Net defined benefit pension cost and post retirement plan costs |  |  |  |
|  | Unrealized gain on investments |  | Foreign currency translation |  | Actuarial losses |  | Prior service costs |  | Unrealized gains (losses) on derivatives |  | Total
|  | (in millions)
As of April 30, 2015 |  | $ | 24 |  |  | $ | (28 | ) |  | $ | (428 | ) |  | $ | 75 |  |  | $ | — |  |  | $ | (357 | )
Other comprehensive income (loss) before reclassifications |  | (5 | ) |  | (12 | ) |  | — |  |  | — |  |  | (3 | ) |  | (20 | )
Amounts reclassified out of accumulated other comprehensive loss |  | — |  |  | — |  |  | 11 |  |  | (8 | ) |  | — |  |  | 3 |
Tax (expense) benefit |  | (2 | ) |  | — |  |  | (4 | ) |  | 3 |  |  | 1 |  |  | (2 | )
Other comprehensive income (loss) |  | (7 | ) |  | (12 | ) |  | 7 |  |  | (5 | ) |  | (2 | ) |  | (19 | )
As of July 31, 2015 |  | $ | 17 |  |  | $ | (40 | ) |  | $ | (421 | ) |  | $ | 70 |  |  | $ | (2 | ) |  | $ | (376 | )
As of October 31, 2014 |  | $ | 16 |  |  | $ | 6 |  |  | $ | (444 | ) |  | $ | 83 |  |  | $ | 3 |  |  | $ | (336 | )
Other comprehensive income (loss) before reclassifications |  | 4 |  |  | (46 | ) |  | — |  |  | — |  |  | (5 | ) |  | (47 | )
Amounts reclassified out of accumulated other comprehensive loss |  | — |  |  | — |  |  | 33 |  |  | (22 | ) |  | (2 | ) |  | 9 |
Tax (expense) benefit |  | (3 | ) |  | — |  |  | (10 | ) |  | 9 |  |  | 2 |  |  | (2 | )
Other comprehensive income (loss) |  | 1 |  |  | (46 | ) |  | 23 |  |  | (13 | ) |  | (5 | ) |  | (40 | )
As of July 31, 2015 |  | $ | 17 |  |  | $ | (40 | ) |  | $ | (421 | ) |  | $ | 70 |  |  | $ | (2 | ) |  | $ | (376 | )
Reclassification out of Accumulated Other Comprehensive Income | Reclassifications out of accumulated other comprehensive loss for the three and nine months ended July 31, 2016 and 2015 were as follows:
Details about Accumulated Other Comprehensive Loss Components |  | Amounts Reclassified from Accumulated Other Comprehensive Loss |  | Affected Line Item in Statement of Operations
|  | Three Months Ended |  | Nine Months Ended |  |
|  | July 31, |  | July 31, |  |
|  | 2016 |  | 2015 |  | 2016 |  | 2015 |  |
|  | (in millions) |  |
Unrealized gain (loss) on derivatives |  | $ | (2 | ) |  | $ | — |  |  | $ | (9 | ) |  | $ | 2 |  |  | Cost of sales
|  | 1 |  |  | — |  |  | 3 |  |  | — |  |  | Provision for income taxes
|  | (1 | ) |  | — |  |  | (6 | ) |  | 2 |  |  | Net of income tax
Net defined benefit pension cost and post retirement plan costs: |  |  |  |  |  |  |  |  |  |
Actuarial net loss |  | (14 | ) |  | (11 | ) |  | (42 | ) |  | (33 | ) |  |
Prior service benefit |  | 6 |  |  | 8 |  |  | 19 |  |  | 22 |  |  |
|  | (8 | ) |  | (3 | ) |  | (23 | ) |  | (11 | ) |  | Total before income tax
|  | 3 |  |  | 1 |  |  | 8 |  |  | 1 |  |  | Provision for income taxes
|  | (5 | ) |  | (2 | ) |  | (15 | ) |  | (10 | ) |  | Net of income tax
Total reclassifications for the period |  | $ | (6 | ) |  | $ | (2 | ) |  | $ | (21 | ) |  | $ | (8 | ) |  |

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