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Investments - Schedule of Realized and Unrealized Gains and Losses on Investments (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]      
Unrealized (losses) gains on equity securities held as of the end of the period $ (3.3) $ 2.6 $ 2.9
Realized gains for equity securities sold during the period   0.3 0.7
Total (losses) gains recognized in other (expense) income, net $ (3.3) $ 2.9 $ 3.6