Fair Value - Schedule of Fair Value Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Non-Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reduction/Amortization for the period	$ 2.0	$ 0.3	$ 10.0
Impact of changes in foreign currency rates	3.3	2.4	$ 8.6
Discontinued Operations, Disposed of by Sale | Balcke Durr | Guarantees and Bonds | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Non-Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Guarantees, at period start	9.9
Reduction/Amortization for the period	(2.5)
Impact of changes in foreign currency rates	1.3
Guarantees, at period end	8.7	9.9
Discontinued Operations, Disposed of by Sale | Balcke Durr | Indemnification Agreement | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Non-Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Indemnification assets, at period start	4.8
Reduction/Amortization for the period	2.6
Impact of changes in foreign currency rates	(0.6)
Indemnification assets, at period end	$ 2.8	$ 4.8