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Commitments and Contingencies - Additional Information - Petrobras (Detailss) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended
Mar. 31, 2016
Sep. 30, 2017
Dec. 31, 2016
Loss Contingencies [Line Items]      
Loss contingency accrual   $ 50.5  
Petrobras      
Loss Contingencies [Line Items]      
Loss contingency accrual     $ 5.4
Petrobras | FPSO Segment      
Loss Contingencies [Line Items]      
Percentage of rate reduction claim   2.00%  
Estimated claim $ 10.9    
Loss contingency accrual   $ 9.8  
Range of possible losses in addition to what has already been accrued   $ 1.1