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Revenues from Contracts with Customers - Contract Costs (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Contract costs          
Contract cost asset $ 206.7   $ 206.7   $ 219.2
Practical expedient, incremental costs of obtaining a contract     true    
Amortization expense of contract cost asset $ 10.4 $ 9.0 $ 19.9 $ 17.3  
Impairment loss for contract cost asset     $ 0.0 $ 0.0