Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets:
Restricted cash	$ 3.6	$ 2.2
Carrying value
Liabilities:
Long-term fixed interest rate debt	240
Total
Liabilities:
Long-term fixed interest rate debt	244
Recurring basis | Total
Assets:
Cash equivalents	14.4
Restricted cash	3.6
Foreign exchange contracts	3.3
Embedded derivatives in purchase and delivery contracts	0.3
Commodity contracts	0.1
Long-term restricted cash	3.9
Total assets recorded at fair value	25.6
Liabilities:
Interest rate swap contracts	0.9
Foreign exchange contracts	0.3
Embedded derivatives in purchase and delivery contracts	0.5
Fixed price commodity contracts	0.1
Total liabilities recorded at fair value	1.8
Recurring basis | Quoted Prices in Active Markets Available (Level 1)
Assets:
Cash equivalents	14.4
Restricted cash	3.6
Long-term restricted cash	3.9
Total assets recorded at fair value	21.9
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Foreign exchange contracts	3.3
Embedded derivatives in purchase and delivery contracts	0.3
Commodity contracts	0.1
Total assets recorded at fair value	3.7
Liabilities:
Interest rate swap contracts	0.9
Foreign exchange contracts	0.3
Embedded derivatives in purchase and delivery contracts	0.5
Fixed price commodity contracts	0.1
Total liabilities recorded at fair value	$ 1.8