Recoverable Non-income Taxes (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Summary of recoverable non-income taxes
Total recoverable non-income taxes	$ 40.8	$ 44.5
Brazil [Member]
Summary of recoverable non-income taxes
Total recoverable non-income taxes	32.1	35.8
India [Member]
Summary of recoverable non-income taxes
Total recoverable non-income taxes	7.7	8.0
Europe [Member]
Summary of recoverable non-income taxes
Total recoverable non-income taxes	$ 1.0	$ 0.7