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 | |||||