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Quarterly Operating Results (Unaudited) - Summary of Quarterly Results of Operations Narrative (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |
Loss on contract recognized |  |  |  | $ 33.9 | $ 6.6 | $ 30.8
Impairment charge of asset held for sale | $ 0.6 | $ 6.6 | $ 3.2 |  |  |
Increase in allowance for doubtful accounts |  |  | $ 3.6 |  |  |
Large Deepwater Project |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |
Loss on contract recognized |  | $ 14.3 |  |  |  |
Large Deepwater Project, Recently Delivered |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |
Loss on contract recognized | 10.3 |  |  | $ 24.5 |  |
Fabrication Facilities |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |
Loss on contract recognized | $ 7.6 |  |  |  |  |

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