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Restructuring and Other Charges (Income) - Summary (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Restructuring and Related Activities [Abstract]          
Restructuring charges $ 6.9 $ 2.6 $ 29.7 $ 14.9  
Other charges (income), net 4.1 4.2 14.2 12.4  
Total restructuring and other charges (income) 11.0 $ 6.8 43.9 $ 27.3  
Asset retirement obligation $ 3.1   $ 3.1   $ 3.1