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Commitments and Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) Class_Actions
Loss Contingencies [Line Items]
Payments for Legal Settlements	$ 54
Litigation Settlement, Amount Awarded to Other Party	$ 100
Securities and related litigation
Loss Contingencies [Line Items]
Number of similar class action lawsuits that were later consolidated into one suit | Class_Actions	20

X

- Definition

This element represents the number of class action law suits regarding the change in revenue recognition of long-term construction projects and related disclosures, that were consolidated into one claim.

+ References

No definition available.

+ Details

Name:	hal_NumberOfSimilarClassActionLawsuitsThatWereConsolidatedIntoOneSuit
Namespace Prefix:	hal_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

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

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

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

X

- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

+ Details

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

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=hal_SecuritiesAndRelatedLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: