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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Abstract]    
Property, plant and equipment $ 1,490.7 $ 1,461.1
Accumulated depreciation (460.3) (435.9)
Property, plant and equipment, net $ 1,030.4 $ 1,025.2