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Long-Term Debt - Summary of Debt Refinancing Costs (Detail) - USD ($) $ in Millions | 12 Months Ended
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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 |

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