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Description of Company and Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2018 USD ($) Division | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Number of business segments | Division | 2 |  |
Goodwill [Line Items] |  |  |
Goodwill, Impairment Loss | $ 0 | $ 0 | $ 0
Research and Development [Abstract] |  |  |
Research and development costs | $ 390,000,000 | 360,000,000 | 329,000,000
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 |
Current year acquisitions | 105,000,000 | 285,000,000 |
Purchase price adjustments for previous acquisitions | 27,000,000 | (6,000,000) |
Goodwill | $ 2,825,000,000 | 2,693,000,000 | 2,414,000,000
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) | 28 years |  |
Completion and Production |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | $ 1,922,000,000 | 1,679,000,000 |
Current year acquisitions | 99,000,000 | 249,000,000 |
Purchase price adjustments for previous acquisitions | 34,000,000 | (6,000,000) |
Goodwill | 2,055,000,000 | 1,922,000,000 | 1,679,000,000
Drilling and Evaluation |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill | 771,000,000 | 735,000,000 |
Current year acquisitions | 6,000,000 | 36,000,000 |
Purchase price adjustments for previous acquisitions | (7,000,000) | 0 |
Goodwill | $ 770,000,000 | $ 771,000,000 | $ 735,000,000

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