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Description of Company and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Goodwill | Changes in the carrying amount of goodwill are detailed below by reportable segment.
Millions of dollars | Completion and Production | Drilling and Evaluation | Total
Balance at December 31, 2017: | $ | 1,922 |  | $ | 771 |  | $ | 2,693 |
Current year acquisitions | 99 |  | 6 |  | 105 |
Purchase price adjustments for previous acquisitions | 34 |  | (7 | ) | 27 |
Balance at December 31, 2018: | $ | 2,055 |  | $ | 770 |  | $ | 2,825 |
Current year acquisitions | 6 |  | 5 |  | 11 |
Purchase price adjustments for previous acquisitions | (1 | ) | (1 | ) | (2 | )
Other | (21 | ) | (1 | ) | (22 | )
Balance at December 31, 2019: | $ | 2,039 |  | $ | 773 |  | $ | 2,812 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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