Business Segments Business Segment Geographic Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 854.7	$ 864.4	$ 933.8
Property, Plant and Equipment, Net	157.0	189.4	234.9
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	186.3	189.6	197.2
Property, Plant and Equipment, Net	30.2	35.3	39.0
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	168.0	170.6	171.8
Other North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18.3	19.0	25.4
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	259.3	277.7	297.2
BRAZIL
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	193.4	224.6	216.3
Property, Plant and Equipment, Net	85.4	110.7	144.2
Other South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	65.9	53.1	80.9
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	203.2	210.8	209.9
Property, Plant and Equipment, Net	16.6	13.4	11.8
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	119.7	97.7	137.9
CHINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26.2	24.7	28.9
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	66.3	48.1	82.1
Property, Plant and Equipment, Net	24.8	30.0	39.9
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	27.2	24.9	26.9
Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 86.2	$ 88.6	$ 91.6