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Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Disaggregation of Revenue [Line Items]          
Revenue from contracts with customers $ 272.6 $ 242.1 $ 523.7 $ 469.4  
Performance obligation 0.0   0.0   $ 0.0
United States          
Disaggregation of Revenue [Line Items]          
Revenue from contracts with customers 253.6 226.0 487.1 441.3  
Canada          
Disaggregation of Revenue [Line Items]          
Revenue from contracts with customers $ 19.0 $ 16.1 $ 36.6 $ 28.1