Financial Instruments- FV of Hedging Instruments (Detail) - USD ($) $ in Millions	Apr. 30, 2016	Oct. 31, 2015
Derivatives, Fair Value
Derivative, Collateral, Obligation to Return Cash	$ 23	$ 9
Financial Collateral	143
Total derivatives, gross notional amount	18,623	23,162
Derivative asset, fair value	193	258
Derivative liability, fair value	357	304
Collateralized arrangements in net liability position	177	138
Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	76	210
Other Non-Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	117	48
Other Accrued Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	319	202
Other Non-Current Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	38	102
Derivatives designated as hedging instruments
Derivatives, Fair Value
Total derivatives, gross notional amount	13,596	14,034
Derivatives designated as hedging instruments \| Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	54	172
Derivatives designated as hedging instruments \| Other Non-Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	117	47
Derivatives designated as hedging instruments \| Other Accrued Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	299	165
Derivatives designated as hedging instruments \| Other Non-Current Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	15	79
Derivatives designated as hedging instruments \| Fair value hedges \| Interest rate contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	2,000	3,175
Derivatives designated as hedging instruments \| Fair value hedges \| Interest rate contracts \| Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset		1
Derivatives designated as hedging instruments \| Fair value hedges \| Interest rate contracts \| Other Non-Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	56	37
Derivatives designated as hedging instruments \| Cash flow hedges \| Foreign currency contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	11,596	10,859
Derivatives designated as hedging instruments \| Cash flow hedges \| Foreign currency contracts \| Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	54	171
Derivatives designated as hedging instruments \| Cash flow hedges \| Foreign currency contracts \| Other Non-Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	61	10
Derivatives designated as hedging instruments \| Cash flow hedges \| Foreign currency contracts \| Other Accrued Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	299	165
Derivatives designated as hedging instruments \| Cash flow hedges \| Foreign currency contracts \| Other Non-Current Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	15	79
Derivatives not designated as hedging instruments
Derivatives, Fair Value
Total derivatives, gross notional amount	5,027	9,128
Derivatives not designated as hedging instruments \| Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	22	38
Derivatives not designated as hedging instruments \| Other Non-Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset		1
Derivatives not designated as hedging instruments \| Other Accrued Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	20	37
Derivatives not designated as hedging instruments \| Other Non-Current Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	23	23
Derivatives not designated as hedging instruments \| Foreign currency contracts
Derivatives, Fair Value
Total derivatives, gross notional amount	4,891	8,955
Derivatives not designated as hedging instruments \| Foreign currency contracts \| Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	19	33
Derivatives not designated as hedging instruments \| Foreign currency contracts \| Other Non-Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset		1
Derivatives not designated as hedging instruments \| Foreign currency contracts \| Other Accrued Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	20	37
Derivatives not designated as hedging instruments \| Foreign currency contracts \| Other Non-Current Liabilities
Derivatives, Fair Value
Derivative Liability, Fair Value Gross Liability	23	23
Derivatives not designated as hedging instruments \| Other derivatives
Derivatives, Fair Value
Total derivatives, gross notional amount	136	173
Derivatives not designated as hedging instruments \| Other derivatives \| Other Current Assets
Derivatives, Fair Value
Derivative Asset, Fair Value Gross Asset	$ 3	$ 5

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Amount of right to receive cash collateral under master netting arrangements that have not been offset against derivative liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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