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SEGMENT INFORMATION Reconciliation of Reportable Results (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] |  |  |  |
Total reportable operating segments' income from operations | $ 185 | $ 86 | $ 306 | $ 69
Share-based compensation expense | (23) | (15) | (50) | (34)
Restructuring Charges | (6) | (11) | (6) | (13)
Amortization of acquisition-related balances | (54) | (65) | (108) | (154)
Acquisition and integration costs | 0 | (17) | (2) | (36)
Northern California wildfire-related costs | 0 | 0 | 0 | (7)
Other | 0 | 4 | 0 | 4
Income from operations | 185 | 86 | 306 | 69
Interest income | 6 | 2 | 10 | 5
Interest expense | (20) | (21) | (40) | (43)
Other income (expense), net | 22 | 16 | 37 | 29
Income before taxes | 193 | 83 | 313 | 60
Operating Segments [Member] |  |  |  |
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] |  |  |  |
Total reportable operating segments' income from operations | 268 | 190 | 472 | 309
Income from operations | $ 268 | $ 190 | $ 472 | $ 309

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- Definition The amounts may include non-cash items such as the amortization of acquired intangible assets and amortization of items associated with fair value purchase accounting adjustments, including recognition of acquired deferred revenue. + References No definition available. + Details
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- Definition Amount of an item in the reconciliation of total profit or loss from reportable segments to the entity's consolidated income before income taxes, extraordinary items, discontinued operations. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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