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Revenue From Contracts With Customers - Contract Balances (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
Revenue from Contract with Customer [Abstract]          
Contract assets $ 10.0   $ 10.0   $ 5.8
Credit losses on contract assets 0.0 $ 0.0 0.0 $ 0.0  
Contract liabilities 17.1   17.1   32.8
Revenue recognized 18.2 9.4 31.0 8.0  
Deferred contract costs 24.1   24.1   $ 36.6
Amortization of deferred contract costs $ 11.0 $ 14.4 $ 31.3 $ 19.1