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Income Taxes - Narrative (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Income Tax Disclosure [Abstract]        
Income Tax Expense (Benefit) $ (6.5) $ (3.3) $ (6.3) $ (17.4)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     21.00%