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Revenue from Contracts with Customers - Revenue Disaggregated by Service Offering (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Disaggregation of Revenue [Line Items]        
Total revenue $ 303.6 $ 313.8 $ 905.2 $ 923.1
Uncollectible Receivables        
Disaggregation of Revenue [Line Items]        
Total revenue     (15.3)  
Subscription        
Disaggregation of Revenue [Line Items]        
Total revenue 300.4 309.8 895.0 912.8
Usage-based        
Disaggregation of Revenue [Line Items]        
Total revenue 2.6 2.6 7.7 7.3
Other        
Disaggregation of Revenue [Line Items]        
Total revenue $ 0.6 $ 1.4 $ 2.5 $ 3.0