Description of Company and Significant Accounting Policies (Details) (USD $)	12 Months Ended
Dec. 31, 2014 Division	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 0us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss	$ 0us-gaap_GoodwillImpairmentLoss
Number of business segments	2hal_NumberOfBusinessSegments
Revenue Recognition [Abstract]
Standard contract period for revenue recognition of maintenance and support fees	1 year
Research and Development [Abstract]
Research and development costs	601,000,000us-gaap_ResearchAndDevelopmentExpense	588,000,000us-gaap_ResearchAndDevelopmentExpense	460,000,000us-gaap_ResearchAndDevelopmentExpense
Cash and Cash Equivalents [Abstract]
Cash equivalents, maximum maturity (in months)	3 months
Goodwill [Roll Forward]
Goodwill	2,168,000,000us-gaap_Goodwill	2,135,000,000us-gaap_Goodwill
Current year acquisitions	156,000,000us-gaap_GoodwillAcquiredDuringPeriod	53,000,000us-gaap_GoodwillAcquiredDuringPeriod
Purchase price adjustments for previous acquisitions	6,000,000	(20,000,000)
Goodwill	2,330,000,000us-gaap_Goodwill	2,168,000,000us-gaap_Goodwill	2,135,000,000us-gaap_Goodwill
Minimum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)	2 years
Maximum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)	17 years
Completion and Production
Goodwill [Roll Forward]
Goodwill	1,533,000,000	1,511,000,000
Current year acquisitions	77,000,000	43,000,000
Purchase price adjustments for previous acquisitions	(4,000,000)	(21,000,000)
Goodwill	1,606,000,000	1,533,000,000
Drilling and Evaluation
Goodwill [Roll Forward]
Goodwill	635,000,000	624,000,000
Current year acquisitions	79,000,000	10,000,000
Purchase price adjustments for previous acquisitions	10,000,000	1,000,000
Goodwill	$ 724,000,000	$ 635,000,000

The maximum original maturity of investments to be considered cash equivalent.

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

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Standard contract period (in years) over which maintenance and support fee revenue is ratably recognized.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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