Fair Value of Financial Instruments - Hierarchy (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Significant Other Observable Inputs (Level 2)
Liabilities:
Fair value of long-term fixed interest rate debt	$ 231.3	$ 253.3
Recurring basis
Assets:
Foreign exchange contracts	4.5
Embedded derivatives in purchase and delivery contracts	0.9	4.0
Fixed price commodity contracts	0.8	0.2
Total assets recorded at fair value	6.2	4.2
Liabilities:
Contingent consideration	12.7	16.6
Foreign exchange contracts	0.1	1.4
Embedded derivatives in purchase and delivery contracts	2.9	0.3
Total liabilities recorded at fair value	15.7	18.3
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Foreign exchange contracts	4.5
Embedded derivatives in purchase and delivery contracts	0.9	4.0
Fixed price commodity contracts	0.8	0.2
Total assets recorded at fair value	6.2	4.2
Liabilities:
Foreign exchange contracts	0.1	1.4
Embedded derivatives in purchase and delivery contracts	2.9	0.3
Total liabilities recorded at fair value	3.0	1.7
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent consideration	12.7	16.6
Total liabilities recorded at fair value	$ 12.7	$ 16.6