Fair Value of Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012
Carrying value
Liabilities:
Long-term fixed interest rate debt	$ 253
Recurring basis | Total
Assets:
Cash equivalents	8.2
Restricted cash	3.3
Embedded derivatives in purchase and delivery contracts	1.4
Long-term restricted cash	3.8
Total assets recorded at fair value	16.7
Liabilities:
Interest rate swap contracts	0.5
Foreign exchange contracts	2.4
Embedded derivatives in purchase and delivery contracts	0.3
Fixed price commodity contracts	0.4
Total liabilities recorded at fair value	3.6
Recurring basis | Quoted Prices in Active Markets Available (Level 1)
Assets:
Cash equivalents	8.2
Restricted cash	3.3
Long-term restricted cash	3.8
Total assets recorded at fair value	15.3
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Embedded derivatives in purchase and delivery contracts	1.4
Total assets recorded at fair value	1.4
Liabilities:
Interest rate swap contracts	0.5
Foreign exchange contracts	2.4
Embedded derivatives in purchase and delivery contracts	0.3
Fixed price commodity contracts	0.4
Total liabilities recorded at fair value	$ 3.6