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Property, Plant and Equipment, net (Narratives) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Abstract]      
Depreciation expense $ 212.0 $ 200.0 $ 180.7
Assets under construction 71.1 82.6  
Capitalized interest related to construction $ 0.3 $ 0.2 $ 0.3