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Business Segments - Additional Information (Detail) | 0 Months Ended |  | 3 Months Ended | 6 Months Ended
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Apr. 01, 2014 Segment Business | Apr. 01, 2014 Business | Apr. 01, 2014 Rig Systems [Member] Business | Apr. 01, 2014 Rig Aftermarket [Member] Business | Apr. 01, 2014 Wellbore Technologies [Member] Business | Apr. 01, 2014 Completion & Production Solutions [Member] Business | Jun. 30, 2014 Revenue [Member] | Jun. 30, 2013 Revenue [Member] | Jun. 30, 2014 Revenue [Member] | Jun. 30, 2013 Revenue [Member]
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |
Number of reportable segments | 4 |  |  |  |  |  |  |  |  |
Number of business units |  | 15 | 2 | 1 | 6 | 6 |  |  |  |
Revenue from shipyard customer |  |  |  |  |  |  | 8.00% | 12.00% | 8.00% | 12.00%

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