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Balance Sheet Details - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Apr. 30, 2021	Oct. 31, 2020
Accounts Receivable, Allowance for Credit Loss
Balance at beginning of year	$ 46	$ 31
Provision for credit losses	5	29
Write off's, net of recoveries	(5)	(14)
Balance at end of year	$ 46	$ 46

X

- Definition

Allowance For Doubtful Accounts Receivable, Addition Of Bad Debt Provision

+ References

No definition available.

+ Details

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

X

- Definition

Amount of deductions of receivables doubtful of collection, net of recoveries that were previously charged off.

+ References

No definition available.

+ Details

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

X

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446

+ Details

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

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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