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Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Disaggregation of Revenue [Line Items]          
Performance obligation $ 0.0   $ 0.0    
Accrued sales returns 2.4   2.4   $ 1.9
Revenue from contracts with customers 285.7 $ 243.9 755.1 $ 724.7  
United States          
Disaggregation of Revenue [Line Items]          
Revenue from contracts with customers 270.3 232.8 711.6 690.3  
Canada          
Disaggregation of Revenue [Line Items]          
Revenue from contracts with customers $ 15.4 $ 11.1 $ 43.5 $ 34.4