Fair Value of Financial Instruments - Hierarchy (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Significant Other Observable Inputs (Level 2)
Liabilities:
Fair value of long-term fixed interest rate debt	$ 230.3	$ 253.3
Recurring basis
Assets:
Embedded derivatives in purchase and delivery contracts	0.9	4.0
Foreign exchange contracts	4.4
Fixed price commodity contracts	0.7	0.2
Total assets recorded at fair value	6.0	4.2
Liabilities:
Contingent consideration	12.3	16.6
Foreign exchange contracts	0.3	1.4
Embedded derivatives in purchase and delivery contracts	2.2	0.3
Total liabilities recorded at fair value	14.8	18.3
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Embedded derivatives in purchase and delivery contracts	0.9	4.0
Foreign exchange contracts	4.4
Fixed price commodity contracts	0.7	0.2
Total assets recorded at fair value	6.0	4.2
Liabilities:
Foreign exchange contracts	0.3	1.4
Embedded derivatives in purchase and delivery contracts	2.2	0.3
Total liabilities recorded at fair value	2.5	1.7
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent consideration	12.3	16.6
Total liabilities recorded at fair value	$ 12.3	$ 16.6