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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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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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No definition available.

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- Definition

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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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.

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No definition available.

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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Amount of transfers into (out 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 number of businesses acquired by the entity during the period.

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No definition available.

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No definition available.

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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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Description of Company and Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) Division	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of business segments \| Division		2
Goodwill [Line Items]
Number of Businesses Acquired		3
Goodwill, Impairment Loss		$ 0	$ 0	$ 0
Research and Development [Abstract]
Research and development costs		$ 360,000,000	329,000,000	487,000,000
Cash and Cash Equivalents [Abstract]
Cash equivalents, maximum maturity (in months)		3 months
Goodwill [Roll Forward]
Goodwill	$ 2,693,000,000	$ 2,414,000,000	2,385,000,000
Current year acquisitions		285,000,000	31,000,000
Purchase price adjustments for previous acquisitions		(6,000,000)	(2,000,000)
Goodwill, Transfers			0
Goodwill		$ 2,693,000,000	$ 2,414,000,000	$ 2,385,000,000
Income Taxes [Abstract]
United States statutory rate		35.00%	35.00%	35.00%
Minimum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)		1 year
Maximum
Finite-lived intangible assets [Abstract]
Useful life of finite-lived intangible assets (in years)		15 years
Completion and Production
Goodwill [Roll Forward]
Goodwill	1,922,000,000	$ 1,679,000,000	$ 1,634,000,000
Current year acquisitions		249,000,000	31,000,000
Purchase price adjustments for previous acquisitions		(6,000,000)	(2,000,000)
Goodwill, Transfers			16,000,000
Goodwill		1,922,000,000	1,679,000,000	$ 1,634,000,000
Drilling and Evaluation
Goodwill [Roll Forward]
Goodwill	$ 771,000,000	735,000,000	751,000,000
Current year acquisitions		36,000,000	0
Purchase price adjustments for previous acquisitions		0	0
Goodwill, Transfers			(16,000,000)
Goodwill		$ 771,000,000	$ 735,000,000	$ 751,000,000
Subsequent Event [Member]
Income Taxes [Abstract]
United States statutory rate	21.00%