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Investments in Unconsolidated Affiliates (Hamer) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Subsidiary, Sale of Stock [Line Items]        
Equity in earnings of unconsolidated affiliates, net of tax $ 7.0 $ 8.6 $ 33.3 $ 24.9