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Income Taxes - Schedule of Income before Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Domestic - U.K. | $ 4.1 | $ 10.7 | $ 10.4
Income / (loss) before income taxes | 22.2 | 26.5 | (9.7)
United States |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income (loss) from continuing operations before income taxes, foreign | 15.8 | 11.4 | (23.5)
Foreign - Other |  |  |
Effective Income Tax Rate Reconciliation [Line Items] |  |  |
Income (loss) from continuing operations before income taxes, foreign | $ 2.3 | $ 4.4 | $ 3.4

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