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Long-Term Debt - Summary of Debt Refinancing Costs (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]      
Gross cost at January 1 $ 1.4 $ 1.8  
Written off 0.0 (1.8)  
Capitalized in the year 0.3 1.4  
Gross cost 1.7 1.4 $ 1.8
Accumulated amortization,Beginning Balance (0.2) (1.2)  
Written off 0.0 1.4  
Amortization in the year (0.4) (0.4) (0.4)
Accumulated amortization,Ending balance (0.6) (0.2) $ (1.2)
Deferred finance costs, net $ 1.1 $ 1.2