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Property, Plant and Equipment and Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Property, Plant and Equipment [Line Items]        
Non-cash pre-tax impairment charge   $ 378.0   $ 378.0
Estimated amortization expense for intangible assets [Abstract]        
2018     $ 182.6  
2019     171.6  
2020     159.4  
2021     149.5  
2022     141.2  
Proceeds from sale of property $ 69.3      
Gain on sale of inland marine barge business $ 48.1   $ 48.1  
Minimum [Member]        
Property, Plant and Equipment [Line Items]        
Estimated useful lives     10 years  
Maximum [Member]        
Property, Plant and Equipment [Line Items]        
Estimated useful lives     20 years