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Restructuring - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
employee
Jun. 30, 2020
employee
Mar. 31, 2020
employee
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Restructuring Cost and Reserve [Line Items]              
Restructuring charges $ 2.3     $ 0.0 $ 27.0 $ 0.0  
Number of positions eliminated | employee 100 550 90        
Restructuring reserve $ 20.1       20.1   $ 4.5
Other Current Liabilities              
Restructuring Cost and Reserve [Line Items]              
Restructuring reserve 18.9       18.9    
Other Noncurrent Liabilities              
Restructuring Cost and Reserve [Line Items]              
Restructuring reserve $ 1.2       $ 1.2