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Retirement and Post-Retirement Benefit Plans (Details) - Defined Benefit Plans $ in Billions | 3 Months Ended
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Oct. 31, 2017 USD ($)
Defined benefit plans |
Plan assets | $ 8.3
Projected benefit obligation | 8.1
Recognized accumulated comprehensive loss | $ 1.9

X
- Definition Transfer of plan assets from Parent to the Company in connection with separation. + References No definition available. + Details
Name: | hpe_DefinedBenefitPlanTransferOfAssetsFromParentInConnectionToSeparation
Namespace Prefix: | hpe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Transfer of net benefit obligation from parent to the Company in connection with the separation. + References No definition available. + Details
Name: | hpe_DefinedBenefitPlanTransferOfNetBenefitObligationFromParentInConnectionWithSeparation
Namespace Prefix: | hpe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Transfer of Accumulated Other Comprehensive Income (Loss), from the parent to Company in connection with the separation. + References No definition available. + Details
Name: | hpe_TransferOfAccumulatedOtherComprehensiveIncomeLossFromParentInConnectionWithSeparation
Namespace Prefix: | hpe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |