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Goodwill Impairment (Tables) | 9 Months Ended
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Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill Identified by Segment | At September 30, 2016, the Company has approximately $6 billion of goodwill, which is identified by segment as follows (in millions):
|  | Rig Systems |  |  | Rig Aftermarket |  |  | Wellbore Technologies |  |  | Completion & Production Solutions |  |  | Total |
Gross value before accumulated impairment |  | $ | 1,232 |  |  | $ | 877 |  |  | $ | 4,359 |  |  | $ | 1,997 |  |  | $ | 8,465 |
Accumulated impairment |  |  | — |  |  |  | — |  |  |  | (1,485 | ) |  |  | — |  |  |  | (1,485 | )
Balance at December 31, 2015 |  | $ | 1,232 |  |  | $ | 877 |  |  | $ | 2,874 |  |  | $ | 1,997 |  |  | $ | 6,980 |
Goodwill acquired and adjusted during period |  |  | 1 |  |  |  | — |  |  |  | (7 | ) |  |  | — |  |  |  | (6 | )
Impairment |  |  | (972 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (972 | )
Currency translation adjustments and other |  |  | — |  |  |  | — |  |  |  | 4 |  |  |  | 9 |  |  |  | 13 |
Balance at September 30, 2016 |  | $ | 261 |  |  | $ | 877 |  |  | $ | 2,871 |  |  | $ | 2,006 |  |  | $ | 6,015 |

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