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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: |