Restructuring and Impairment Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Restructuring and Impairment [Line Items]
Restructuring expense	$ 45.7	$ 4.9
Impairment expense	66.5
Restructuring and impairment expense	112.2	4.9
Subsea Technologies
Restructuring and Impairment [Line Items]
Restructuring expense	28.0	$ 4.9
Impairment expense	5.1
Surface Technologies
Restructuring and Impairment [Line Items]
Restructuring expense	12.0
Impairment expense	61.4
Energy Infrastructure
Restructuring and Impairment [Line Items]
Restructuring expense	$ 5.7