v3.10.0.1

Financial Instruments - Contractual Maturities of Investments in Available-for-Sale Debt Securities (Details) $ in Millions | Jul. 31, 2018 USD ($)
--- | ---
Amortized Cost |
Due in more than five years | $ 143
Fair Value |
Due in more than five years | $ 162

X
- Definition Amortized Cost of available-for-sale debt securities, maturing after the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | hpe_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost
Namespace Prefix: | hpe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of available-for-sale debt securities, maturing after the fifth fiscal year following the latest fiscal year. + References No definition available. + Details
Name: | hpe_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue
Namespace Prefix: | hpe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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