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Property, Plant and Equipment and Intangible Assets - Schedule of Changes in Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Finite Lived Intangible Assets Roll Forward      
Balance at beginning of period $ 1,735.0 $ 1,983.2  
Held for sale assets   (76.6)  
Impairment (208.6)    
Amortization (144.0) (171.6) $ (182.6)
Balance at end of period $ 1,382.4 $ 1,735.0 $ 1,983.2