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Unconsolidated Affiliate Companies (Details) - Joint Ventures - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Unconsolidated Affiliate Companies    
Ownership percentage 50.00%  
Net investment $ 13.6 $ 12.9
Current assets 50.0 49.7
Non-current assets 15.7 5.1
Current liabilities 37.3 29.7
Equity 28.4 25.1
Revenue 131.6 99.2
Gross profit 85.0 62.1
Income from operations 26.2 16.8
Net income $ 20.1 $ 13.1