v3.8.0.1

Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions | Apr. 30, 2018 | Oct. 31, 2017
--- | --- | ---
Assets |  |
Total assets | $ 5,456 | $ 7,260
Liabilities |  |
Total liabilities | 678 | 477
Time deposits |  |
Assets |  |
Total assets | 1,656 | 1,159
Money market funds |  |
Assets |  |
Total assets | 3,391 | 5,592
Foreign bonds |  |
Assets |  |
Total assets | 144 | 223
Other debt securities |  |
Assets |  |
Total assets | 26 | 26
Foreign exchange contracts |  |
Assets |  |
Total assets | 238 | 259
Liabilities |  |
Total liabilities | 326 | 335
Other derivatives |  |
Assets |  |
Total assets | 1 | 1
Interest rate contracts |  |
Liabilities |  |
Total liabilities | 352 | 142
Level 1 |  |
Assets |  |
Total assets | 3,400 | 5,601
Liabilities |  |
Total liabilities | 0 | 0
Level 1 | Time deposits |  |
Assets |  |
Total assets | 0 | 0
Level 1 | Money market funds |  |
Assets |  |
Total assets | 3,391 | 5,592
Level 1 | Foreign bonds |  |
Assets |  |
Total assets | 9 | 9
Level 1 | Other debt securities |  |
Assets |  |
Total assets | 0 | 0
Level 1 | Foreign exchange contracts |  |
Assets |  |
Total assets | 0 | 0
Liabilities |  |
Total liabilities | 0 | 0
Level 1 | Other derivatives |  |
Assets |  |
Total assets | 0 | 0
Level 1 | Interest rate contracts |  |
Liabilities |  |
Total liabilities | 0 | 0
Level 2 |  |
Assets |  |
Total assets | 2,030 | 1,633
Liabilities |  |
Total liabilities | 678 | 477
Level 2 | Time deposits |  |
Assets |  |
Total assets | 1,656 | 1,159
Level 2 | Money market funds |  |
Assets |  |
Total assets | 0 | 0
Level 2 | Foreign bonds |  |
Assets |  |
Total assets | 135 | 214
Level 2 | Other debt securities |  |
Assets |  |
Total assets | 0 | 0
Level 2 | Foreign exchange contracts |  |
Assets |  |
Total assets | 238 | 259
Liabilities |  |
Total liabilities | 326 | 335
Level 2 | Other derivatives |  |
Assets |  |
Total assets | 1 | 1
Level 2 | Interest rate contracts |  |
Liabilities |  |
Total liabilities | 352 | 142
Level 3 |  |
Assets |  |
Total assets | 26 | 26
Liabilities |  |
Total liabilities | 0 | 0
Level 3 | Time deposits |  |
Assets |  |
Total assets | 0 | 0
Level 3 | Money market funds |  |
Assets |  |
Total assets | 0 | 0
Level 3 | Foreign bonds |  |
Assets |  |
Total assets | 0 | 0
Level 3 | Other debt securities |  |
Assets |  |
Total assets | 26 | 26
Level 3 | Foreign exchange contracts |  |
Assets |  |
Total assets | 0 | 0
Liabilities |  |
Total liabilities | 0 | 0
Level 3 | Other derivatives |  |
Assets |  |
Total assets | 0 | 0
Level 3 | Interest rate contracts |  |
Liabilities |  |
Total liabilities | $ 0 | $ 0

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
Name: | us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_LiabilitiesFairValueDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_BankTimeDepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |