Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets:
Restricted cash	$ 2.2	$ 2.9
Long-term restricted cash	3.9	3.5
Recurring basis | Total
Assets:
Cash equivalents	26.3
Restricted cash	2.2
Embedded derivatives in purchase and delivery contracts	0.6
Commodity contracts	0.5
Long-term restricted cash	3.9
Total assets recorded at fair value	33.5
Liabilities:
Interest rate swap contract	1.1
Foreign exchange contracts	4.2
Embedded derivatives in purchase and delivery contracts	0.4
Fixed price commodity contracts	0.5
Total liabilities recorded at fair value	6.2
Recurring basis | Quoted Prices in Active Markets Available (Level 1)
Assets:
Cash equivalents	26.3
Restricted cash	2.2
Long-term restricted cash	3.9
Total assets recorded at fair value	32.4
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Embedded derivatives in purchase and delivery contracts	0.6
Commodity contracts	0.5
Total assets recorded at fair value	1.1
Liabilities:
Interest rate swap contract	1.1
Foreign exchange contracts	4.2
Embedded derivatives in purchase and delivery contracts	0.4
Fixed price commodity contracts	0.5
Total liabilities recorded at fair value	$ 6.2