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Restructuring (Tables)
9 Months Ended
Sep. 30, 2020
Restructuring and Related Activities [Abstract]  
Roll Forward of Restructuring Reserve Activity Restructuring reserves activity is as follows:
Severance and Employee
Benefit Costs
Balance at December 31, 2019$4.5 
Additions27.0 
Payments(11.4)
Balance at September 30, 2020$20.1