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Restructuring and Acquisition-Related Costs (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Restructuring Reserve [Roll Forward]    
Restructuring reserve $ 11.5 $ 12.2
Charges 35.9 31.8
Cash utilization (43.6) (30.9)
Restructuring reserve 3.8 13.1
Employee Severance [Member]    
Restructuring Reserve [Roll Forward]    
Restructuring reserve 1.7 4.8
Charges 2.7 19.9
Cash utilization (3.9) (19.9)
Restructuring reserve 0.5 4.8
Other Restructuring [Member]    
Restructuring Reserve [Roll Forward]    
Restructuring reserve 9.8 7.4
Charges 33.2 11.9
Cash utilization (39.7) (11.0)
Restructuring reserve $ 3.3 $ 8.3