Overview and Summary of Significant Accounting Policies - Impact of Weighted Average Assumptions on Net Periodic Benefit (Costs) (Details) $ in Millions	12 Months Ended
Oct. 31, 2021 USD ($)
Change in basis points
Discount rate	(0.0025)
Expected increase in compensation levels	0.0025
Expected long-term return on plan assets	(0.0025)
Change in Net Periodic Benefit Cost
Discount rate	$ 23
Expected increase in compensation levels	5
Expected long-term return on plan assets	$ 35

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostAbstract
Namespace Prefix:	hpe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost, Basis Points

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostBasisPointsAbstract
Namespace Prefix:	hpe_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Amount

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateAmount
Namespace Prefix:	hpe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate, Basis Points

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateBasisPoints
Namespace Prefix:	hpe_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost, Expected Increase in Compensation, Amount

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedIncreaseInCompensationAmount
Namespace Prefix:	hpe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost, Expected Increase in Compensation, Basis Points

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedIncreaseInCompensationBasisPoints
Namespace Prefix:	hpe_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost, Expected Return on Plan Assets, Amount

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedReturnOnPlanAssetsAmount
Namespace Prefix:	hpe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Defined Benefit Plan, Impact of Assumptions Used Calculating Net Periodic Benefit Cost, Expected Return on Plan Assets, Basis Points

No definition available.

Name:	hpe_DefinedBenefitPlanImpactOfAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedReturnOnPlanAssetsBasisPoints
Namespace Prefix:	hpe_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration