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Share-Based Compensation - Summary of Share-based Compensation Expense (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]      
Option awards $ 12.0 $ 11.5 $ 11.4
Other share-based awards 21.2 30.7 39.2
Total share-based compensation before tax 33.2 42.2 50.6
Tax benefit 8.1 10.3 12.0
Total share-based compensation expense included in net income $ 25.1 $ 31.9 $ 38.6