Business Segment and Geographic Information (Narrative) (Details)	12 Months Ended
Dec. 31, 2021 Division Countries	Dec. 31, 2020 Countries	Dec. 31, 2019 Countries
Segment Reporting Information [Line Items]
Number of business segments \| Division	2
Maximum Percentage Revenue from One Geographic Segment	10.00%	10.00%	10.00%
Maximum Percentage Property Plant and Equipment from One Geographic Segment	10.00%	10.00%
Number of Countries Exceed Revenue Threshold	1	1	1
Number of Countries Exceed Property Plant and Equipment Threshold	1	1
Property, Plant and Equipment [Member] \| Geographic Concentration Risk \| UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	50.00%	49.00%
Revenue Benchmark [Member] \| Geographic Concentration Risk \| UNITED STATES
Segment Reporting Information [Line Items]
Concentration Risk, Percentage	40.00%	38.00%	51.00%

The maximum percentage of property plant and equipment from one geographic location at balance sheet date.

No definition available.

Name:	hal_MaximumPercentagePropertyPlantandEquipmentfromOneGeographicSegment
Namespace Prefix:	hal_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	hal_MaximumPercentageRevenuefromOneGeographicSegment
Namespace Prefix:	hal_
Data Type:	dtr-types:percentItemType
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

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

- Definition

The number of countries that exceed the property, plant and equipment threshold of 10%.

+ References

No definition available.

+ Details

Name:	hal_NumberofCountriesExceedPropertyPlantandEquipmentThreshold
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

Name:	hal_NumberofCountriesExceedRevenueThreshold
Namespace Prefix:	hal_
Data Type:	xbrli:integerItemType
Balance Type:	na
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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_PropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: