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Accounting for Leases as a Lessor - Narrative (Details)	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) tranche	Apr. 30, 2021 USD ($)	Apr. 30, 2021 USD ($)	Oct. 31, 2020 USD ($)
Leases [Abstract]
Financing receivable term, low end of range			2 years
Financing receivable term, high end of range			5 years
Financing receivable sold		$ 23,000,000	$ 80,000,000	$ 103,000,000
Asset-backed Debt Securities
Lessor, Lease, Description [Line Items]
Amount issued	$ 1,000,000,000.0
Number of tranches | tranche	6
Discount rate at issuance	99.99%
Weighted-average interest rate	0.49%

X

- Definition

The discount to par at which a debt instrument was issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	hpe_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt Instrument, Number of Tranches

+ References

No definition available.

+ Details

Name:	hpe_DebtInstrumentNumberofTranches
Namespace Prefix:	hpe_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The high end of the range of the term of financing receivables.

+ References

No definition available.

+ Details

Name:	hpe_FinancingReceivableTermRangeMaximum
Namespace Prefix:	hpe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The low end of the range of the term of financing receivables.

+ References

No definition available.

+ Details

Name:	hpe_FinancingReceivableTermRangeMinimum
Namespace Prefix:	hpe_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of decrease from sale and reclassification to held-for-sale of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 11
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919244-210447

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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X

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: