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Financial Instruments - Schedule of Pre-Tax Effect of Derivative Instruments in Cash Flow Hedging Relationships (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Pre-tax effect of derivative instruments in cash flow hedging relationships |  |  |
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) | $ 341 | $ (651) | $ 199
Foreign currency contracts | Cash flow hedges |  |  |
Pre-tax effect of derivative instruments in cash flow hedging relationships |  |  |
Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) | 341 | (651) | 199
(Loss) Gain Reclassified from Accumulated OCI Into Earnings (Effective Portion) | (258) | (199) | (63)
Foreign currency contracts | Cash flow hedges | Net revenue |  |  |
Pre-tax effect of derivative instruments in cash flow hedging relationships |  |  |
(Loss) Gain Reclassified from Accumulated OCI Into Earnings (Effective Portion) | (239) | (156) | 20
Foreign currency contracts | Cash flow hedges | Cost of revenue |  |  |
Pre-tax effect of derivative instruments in cash flow hedging relationships |  |  |
(Loss) Gain Reclassified from Accumulated OCI Into Earnings (Effective Portion) | (18) | (35) | (84)
Foreign currency contracts | Cash flow hedges | Other operating expenses |  |  |
Pre-tax effect of derivative instruments in cash flow hedging relationships |  |  |
(Loss) Gain Reclassified from Accumulated OCI Into Earnings (Effective Portion) | (1) | 1 | 1
Foreign currency contracts | Cash flow hedges | Interest and other, net |  |  |
Pre-tax effect of derivative instruments in cash flow hedging relationships |  |  |
(Loss) Gain Reclassified from Accumulated OCI Into Earnings (Effective Portion) | $ 0 | $ (9) | $ 0

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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109978405&loc=d3e80720-113993 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
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