Stock-Based Compensation - Share-based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 2.8	$ 0.5	$ 7.2	$ 8.3
Stock option compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	0.0	0.0	0.0	0.1
RSU compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	3.7	1.5	5.0	4.9
PSU compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ (0.9)	$ (1.0)	$ 2.2	$ 3.3

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details