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Business Segments and Geographic Areas - Additional Information (Detail) | 12 Months Ended | 0 Months Ended |
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Dec. 31, 2013 Revenue [Member] | Dec. 31, 2012 Revenue [Member] | Dec. 31, 2011 Revenue [Member] | Apr. 01, 2014 Subsequent Event [Member] Segment Business | Apr. 01, 2014 Subsequent Event [Member] Business | Apr. 01, 2014 Subsequent Event [Member] Rig Systems [Member] Business | Apr. 01, 2014 Subsequent Event [Member] Rig Aftermarket [Member] Business | Apr. 01, 2014 Subsequent Event [Member] Wellbore Technologies [Member] Business | Apr. 01, 2014 Subsequent Event [Member] Completion & Production Solutions [Member] Business
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  | 4 |  |  |  |  |
Number of business units |  |  |  |  | 15 | 2 | 1 | 6 | 6
Revenue from shipyard customer | 11.00% | 11.00% | 13.00% |  |  |  |  |  |

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