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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
	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

X

- 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

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-Publisher FASB
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-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959

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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
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
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-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580

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