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Income Taxes - Unrecognized Tax Benefits (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]    
Beginning Balance $ 2.8 $ 2.9
Decrease in balances related to prior year tax positions (3.0) (0.3)
Increase in balances related to current year tax positions 17.5  
Interest accrued   0.2
Ending Balance $ 17.3 $ 2.8