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Income Taxes - Unrecognized Tax Benefits (Details)
$ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]  
Beginning balance $ 0.0
Additions related to current period tax positions 2.6
Additions related to prior period tax positions 2.4
Ending balance $ 5.0