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Investments in Unconsolidated Affiliates (Hamer) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Subsidiary, Sale of Stock [Line Items]      
Equity in earnings of unconsolidated affiliates, net of tax $ 13.8 $ 9.2  
Investments in unconsolidated affiliates 373.3   321.4
Hamer, LLC
     
Subsidiary, Sale of Stock [Line Items]      
Equity in earnings of unconsolidated affiliates, net of tax 0.4 0.3  
Investments in unconsolidated affiliates 4.3   4.1
Proceeds from Dividends Received $ 0.2