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Goodwill | 9 Months Ended
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Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill | 7. Goodwill A summary of goodwill follows:
| (Stated in millions) |
| Reservoir |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Characterization |  |  | Drilling |  |  | Production |  |  | Cameron |  |  | Total |
Balance at December 31, 2018 | $ | 4,703 |  |  | $ | 10,111 |  |  | $ | 4,678 |  |  | $ | 5,439 |  |  | $ | 24,931 |
Impairment |  | (97 | ) |  |  | (3,025 | ) |  |  | (705 | ) |  |  | (5,001 | ) |  |  | (8,828 | )
Impact of changes in exchange rates and other |  | 7 |  |  |  | 3 |  |  |  | (1 | ) |  |  | - |  |  |  | 9 |
Balance at September 30, 2019 | $ | 4,613 |  |  | $ | 7,089 |  |  | $ | 3,972 |  |  | $ | 438 |  |  | $ | 16,112 |

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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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