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