Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended					6 Months Ended
	Jun. 30, 2012 Environmental	Jun. 30, 2011 Environmental	Jun. 30, 2012 Environmental	Jun. 30, 2011 Environmental	Dec. 31, 2011 Environmental	Jun. 30, 2012 Brazilian Tax Disputes - Case 1	Aug. 31, 2005 Brazilian Tax Disputes - Case 2	Jun. 30, 2012 Other defendants case claim
Commitments and Contingencies
Accruals for environmental matters	$ 2.1		$ 2.1		$ 2.5
Charges related to environmental matters	0.3	0.6	0.5	0.8
Estimated claims or assessment, before tax						3	3
Estimated claims or assessment, additional amount						28	9
Estimated claims or assessment, aggregate amount							12
Approximate number of defendants that includes the company named in legal actions								90
Minimum amount of damages								20
Maximum amount of damages								$ 25
Number of pending claims								18,626
Number of claims pending in New York Supreme Court								18,126
Number of claims pending in various counties in a number of state courts, and in certain Federal District Courts								500
Number of claims dismissed to date by stipulation or summary judgment prior to trial								26,128
Number of active or in extremis cases in New York County								804