Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.22.2
Share-Based Compensation - Additional Information (Detail) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 13.7 $ 14.6 $ 26.1 $ 27.9
Unrecognized compensation cost on non-vested stock awards 100.0   $ 100.0  
Unrecognized compensation cost on non-vested stock awards, weighted-average period of recognition     1 year 9 months 18 days  
Total intrinsic value of awards exercised for SARs 0.1 10.3 $ 0.4 24.1
Total vesting date fair value of stock units $ 1.1 $ 1.9 $ 33.5 $ 37.4
SARs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
SARs granted 0 0 0 0