Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					3 Months Ended
	Mar. 31, 2013 Environmental	Mar. 31, 2012 Environmental	Dec. 31, 2012 Environmental	Mar. 31, 2013 Brazilian Tax Disputes - Case 1	Aug. 31, 2005 Brazilian Tax Disputes - Case 2	Mar. 31, 2013 Other defendants case claim
Commitments and Contingencies
Accruals for environmental matters	$ 1.4		$ 1.9
Charges related to environmental matters	0.3	0.2
Estimated claims or assessment, before tax				3	3
Estimated claims or assessment, additional amount				30	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						18,090
Number of claims pending in New York Supreme Court						17,600
Number of claims pending in various counties in a number of state courts, and in certain Federal District Courts						490
Number of claims dismissed to date by stipulation or summary judgment prior to trial						26,715
Number of active or in extremis cases in New York County						477