The maximum percentage of revenue from one geographic segment for the periods presented.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

The number of business segments into which the company's operations are divided.

+ References

No definition available.

+ Details

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

- Definition

The number of countries that exceed the revenue threshold of 10%.

+ References

No definition available.

+ Details

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Namespace Prefix:	hal_
Data Type:	xbrli:integerItemType
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Period Type:	duration

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
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+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

+ Details

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

- Definition

Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045

+ Details

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

- Definition

Description of timing for satisfying performance obligation in contract with customer. Includes, but is not limited to, as services are rendered, and upon shipment, delivery or completion of service.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130554-203045

+ Details

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Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementGeographicalAxis=srt_NorthAmericaMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=srt_LatinAmericaMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=hal_EuropeAfricaCISMember
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Data Type:	na
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Period Type:

- Details

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Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=hal_CompletionAndProductionMember
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Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=hal_DrillingAndEvaluationMember
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Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
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- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
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- Details

Name:	srt_StatementGeographicalAxis=country_US
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Revenue (Details) $ in Millions	3 Months Ended		6 Months Ended
Revenue (Details) $ in Millions	Jun. 30, 2020 USD ($) Division	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Countries Division	Jun. 30, 2019 USD ($) Countries
Disaggregation of Revenue [Line Items]
Number of business segments \| Division	2		2
Maximum Percentage Revenue from One Geographic Segment			10.00%	10.00%
Number of Countries Exceed Revenue Threshold \| Countries			1	1
Revenue	$ 3,196	$ 5,930	$ 8,233	$ 11,667
Revenue, Performance Obligation, Description of Timing			one year
North America [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,049	3,327	$ 3,509	6,602
Latin America [Member]
Disaggregation of Revenue [Line Items]
Revenue	346	571	862	1,158
Europe/Africa/CIS [Member]
Disaggregation of Revenue [Line Items]
Revenue	691	823	1,522	1,571
Middle East/Asia [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,110	1,209	2,340	2,336
Completion And Production [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,672	3,805	4,634	7,467
Drilling And Evaluation [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 1,524	$ 2,125	$ 3,599	$ 4,200
Minimum [Member]
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Description of Payment Terms			20
Maximum [Member]
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Description of Payment Terms			60
Revenue Benchmark [Member] \| UNITED STATES
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage			41.00%	54.00%