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Goodwill | 9 Months Ended
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Sep. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill | 7. Goodwill The changes in the carrying amount of goodwill by segment were as follows:
| (Stated in millions) |
| Reservoir |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Characterization |  |  | Drilling |  |  | Production |  |  | Cameron |  |  | Total |
Balance at December 31, 2019 | $ | 4,560 |  |  | $ | 7,092 |  |  | $ | 3,949 |  |  | $ | 441 |  |  | $ | 16,042 |
Impairment (See Note 2) |  | - |  |  |  | (1,659 | ) |  |  | (1,228 | ) |  |  | (183 | ) |  |  | (3,070 | )
Impact of changes in exchange rates and other |  | - |  |  |  | 10 |  |  |  | (17 | ) |  |  | 3 |  |  |  | (4 | )
Balance at September 30, 2020 | $ | 4,560 |  |  | $ | 5,443 |  |  | $ | 2,704 |  |  | $ | 261 |  |  | $ | 12,968 |

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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