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Income Taxes - Changes Occurred in Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Abstract] |  |  |
Beginning balance of unrecognized tax benefits | $ 49.1 | $ 49.7 | $ 54.1
Additions for current year tax positions | 6.8 | 9.7 | 8.8
Additions for prior year tax positions | 4.3 | 1.0 | 2.2
Reductions for prior year tax positions | (14.6) | (6.6) | (3.7)
Reductions for audit settlements | (0.3) | (0.2) | (1.8)
Reductions for the expiration of statutes of limitations | (4.1) | (4.4) | (6.2)
Changes due to foreign currency translation adjustments | (1.3) | (0.1) | (3.7)
Ending balance of unrecognized tax benefits (excluding interest and penalties) | 39.9 | 49.1 | 49.7
Interest and penalties associated with unrecognized tax benefits | 11.4 | 18.3 | 22.8
Ending balance of unrecognized tax benefits (including interest and penalties) | $ 51.3 | $ 67.4 | $ 72.5

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