Fair Value of Financial Instruments - Hierarchy (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Significant Other Observable Inputs (Level 2)
Liabilities:
Fair value of long-term fixed interest rate debt	$ 227.5	$ 231.3
Recurring basis
Assets:
Embedded derivatives in purchase and delivery contracts	0.7	0.9
Foreign exchange contracts	0.6	4.5
Fixed price commodity contracts		0.8
Total assets recorded at fair value	1.3	6.2
Liabilities:
Contingent consideration	13.0	12.7
Foreign exchange contracts	4.3	0.1
Embedded derivatives in purchase and delivery contracts	1.4	2.9
Fixed price commodity contracts	0.1
Total liabilities recorded at fair value	18.8	15.7
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Embedded derivatives in purchase and delivery contracts	0.7	0.9
Foreign exchange contracts	0.6	4.5
Fixed price commodity contracts		0.8
Total assets recorded at fair value	1.3	6.2
Liabilities:
Foreign exchange contracts	4.3	0.1
Embedded derivatives in purchase and delivery contracts	1.4	2.9
Fixed price commodity contracts	0.1
Total liabilities recorded at fair value	5.8	3.0
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent consideration	13.0	12.7
Total liabilities recorded at fair value	$ 13.0	$ 12.7