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Restructuring and Related Activities (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs Restructuring reserves activity is as follows:
Severance and Employee
Benefit Costs
December 31, 2020December 31, 2019
Beginning of year balance$4.5 $— 
Additions60.5 4.5 
Payments(21.6)— 
End of year balance$43.4 $4.5