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Equity Method Investments (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Schedule of Equity Method Investments    
Income from equity affiliates $ 13.9 $ 14.0
Subsea    
Schedule of Equity Method Investments    
Income from equity affiliates 15.1 16.6
Onshore/Offshore    
Schedule of Equity Method Investments    
Income from equity affiliates $ (1.2) $ (2.6)