Business Segment and Geographic Information (Narrative) (Details) $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($) Division Countries Customers	Dec. 31, 2016 USD ($) Countries Customers
Concentration Risk [Line Items]
Number of business segments \| Division	2
Maximum Percentage Gross Trade Receivables From One Geographic Segment	10.00%	10.00%
Maximum Percentage Gross Trade Receivables From One Customer	10.00%	10.00%
Number of Countries Exceed Receivables Threshold \| Countries	2	2
Number of Customers Exceed Receivables Threshold \| Customers	0	0
Venezuela trade receivables exchanged for promissory note	$ 200
VENEZUELA
Concentration Risk [Line Items]
Accounts Receivable, Gross	636	$ 610
Accounts Receivable, Gross, Noncurrent	$ 441
Accounts Receivable [Member] \| VENEZUELA
Concentration Risk [Line Items]
Concentration Risk, Percentage	15.00%	15.00%
Geographic Concentration Risk [Member] \| UNITED STATES \| Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	37.00%	28.00%

The maximum percentage of gross trade receivables from one customer at balance sheet date.

No definition available.

Name:	hal_MaximumPercentageGrossTradeReceivablesFromOneCustomer
Namespace Prefix:	hal_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum percentage of gross trade receivables from one geographic segment at balance sheet date.

+ References

No definition available.

+ Details

Name:	hal_MaximumPercentageGrossTradeReceivablesFromOneGeographicSegment
Namespace Prefix:	hal_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Number Of Countries Exceed Receivables Threshold of 10%

+ References

No definition available.

+ Details

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

- Definition

Number Of Customers Exceed Receivables Threshold of 10%

+ References

No definition available.

+ Details

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

- Definition

Outstanding Venezuela trade receivables exchanged for interest-bearing promissory note

+ References

No definition available.

+ Details

Name:	hal_Venezuelatradereceivablesexchangedforpromissorynote
Namespace Prefix:	hal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

For unclassified balance sheet, amounts due from customers or clients for goods or services that have been delivered or sold in the normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(9))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AccountsReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amounts due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_AccountsReceivableGrossNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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_ConcentrationRiskLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_StatementGeographicalAxis=country_VE
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
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:	hal_GeographicLocationAxis=country_US
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: