Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.24.1.u1
Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 11.9 $ 10.8
Weighted-average grant date fair value of SARs granted $ 8.07  
Total intrinsic value of awards exercised for SARs $ 0.0  
Total vesting date fair value of stock units $ 6.5 20.0
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total intrinsic value of awards exercised for SARs   $ 0.1
Share-Based Payment Arrangement, Tranche One [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance stock unit awards vesting date Mar. 31, 2025  
Share-Based Payment Arrangement, Tranche Two [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance stock unit awards vesting date Mar. 31, 2026  
Share-Based Payment Arrangement, Tranche Three [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Performance stock unit awards vesting date Mar. 31, 2027  
SARs [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair value of SARs granted $ 4.43 $ 9.2
SARs granted [1] 6,083  
SARs exercised 0  
Service Condition Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost on non-vested stock awards $ 64.1  
Unrecognized compensation cost on non-vested stock awards, weighted-average period of recognition 1 year 8 months 12 days  
[1] Includes 3.4 million performance condition SARs to a consultant