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Consolidated Statements of Cash Flows (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Consolidated Statements of Cash Flows      
Discontinued operations, net cash proceeds from dispositions   $ 10.1 $ 28.8
Dividends paid, noncontrolling interest distributions 2.9 2.6 0.4
Income taxes refunds $ 54.7 $ 25.9 $ 66.4