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Revenues from Contracts with Customers - Contract Costs (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Contract costs          
Contract cost asset $ 201.4   $ 201.4   $ 193.1
Practical expedient, incremental costs of obtaining a contract     true    
Amortization expense of contract cost asset 8.6 $ 9.0 $ 18.2 $ 16.1  
Impairment loss for contract cost asset $ 0.0 $ 0.0 $ 0.0 $ 0.0