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Restructuring and Acquisition-Related Costs (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Restructuring Reserve [Roll Forward]    
Restructuring reserve $ 11.5 $ 12.2
Charges 30.8 24.0
Cash utilization (36.6) (24.9)
Restructuring reserve 5.7 11.3
Employee Severance [Member]    
Restructuring Reserve [Roll Forward]    
Restructuring reserve 1.7 4.8
Charges 2.0 16.3
Cash utilization (3.7) (16.0)
Restructuring reserve 0.0 5.1
Other Restructuring [Member]    
Restructuring Reserve [Roll Forward]    
Restructuring reserve 9.8 7.4
Charges 28.8 7.7
Cash utilization (32.9) (8.9)
Restructuring reserve $ 5.7 $ 6.2