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Share-Based Compensation - Summary of Share-based Compensation Expense (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Option awards $ 9.8 $ 13.8 $ 21.8
Other share-based awards 40.9 40.9 48.0
Total share-based compensation before tax 50.7 54.7 69.8
Tax benefit 12.1 13.1 16.6
Total share-based compensation expense included in net income $ 38.6 $ 41.6 $ 53.2