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Property, Plant, and Equipment - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Depreciation [Abstract]          
Depreciation expense $ 87.6 $ 89.0 $ 258.6 $ 275.3  
Incremental depreciation     0.2 $ 14.0  
Purchases of property, plant, and equipment included in accounts payable     $ 30.3   $ 24.7