Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Significant Other Observable Inputs (Level 2)
Liabilities:
Long-term fixed interest rate debt	$ 242.4	$ 255.6
Recurring basis | Total
Assets:
Cash equivalents	8.0	8.2
Restricted cash	4.7	3.7
Foreign exchange contracts		1.8
Embedded derivatives in purchase and delivery contracts	0.4	0.3
Long-term restricted cash	3.8	3.9
Total assets recorded at fair value	16.9	17.9
Liabilities:
Contingent consideration	2.8	3.7
Embedded derivatives in purchase and delivery contracts	0.2	0.3
Fixed price commodity contracts	0.4	0.2
Total liabilities recorded at fair value	3.4	4.2
Recurring basis | Quoted Prices in Active Markets Available (Level 1)
Assets:
Cash equivalents	8.0	8.2
Restricted cash	4.7	3.7
Long-term restricted cash	3.8	3.9
Total assets recorded at fair value	16.5	15.8
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Foreign exchange contracts		1.8
Embedded derivatives in purchase and delivery contracts	0.4	0.3
Total assets recorded at fair value	0.4	2.1
Liabilities:
Embedded derivatives in purchase and delivery contracts	0.2	0.3
Fixed price commodity contracts	0.4	0.2
Total liabilities recorded at fair value	0.6	0.5
Recurring basis | Significant Unobservable Inputs (Level 3)
Liabilities:
Contingent consideration	2.8	3.7
Total liabilities recorded at fair value	$ 2.8	$ 3.7