Fair Value of Financial Instruments - Hierarchy (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Significant Other Observable Inputs (Level 2)
Liabilities:
Fair value of long-term fixed interest rate debt	$ 213.0	$ 228.8
Recurring basis
Assets:
Foreign exchange contracts	0.6	0.2
Embedded derivatives in purchase and delivery contracts	0.3	0.4
Total assets recorded at fair value	0.9	0.6
Liabilities:
Contingent consideration	16.2	15.1
Hybrid instrument liability	13.7	12.9
Foreign exchange contracts	0.8	2.8
Embedded derivatives in purchase and delivery contracts	0.7	0.9
Fixed price commodity contracts	0.2	0.5
Total liabilities recorded at fair value	31.6	32.2
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Foreign exchange contracts	0.6	0.2
Embedded derivatives in purchase and delivery contracts	0.3	0.4
Total assets recorded at fair value	0.9	0.6
Liabilities:
Foreign exchange contracts	0.8	2.8
Embedded derivatives in purchase and delivery contracts	0.7	0.9
Fixed price commodity contracts	0.2	0.5
Total liabilities recorded at fair value	1.7	4.2
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent consideration	16.2	15.1
Hybrid instrument liability	13.7	12.9
Total liabilities recorded at fair value	$ 29.9	$ 28.0