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Share-Based Awards - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based award compensation expense $ 23.5 $ 33.7 $ 35.5
Share-based award compensation expense, net of tax $ 18.0 $ 25.8 $ 27.2
2020 Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares of common stock reserved for future issuance under the plan 5,400,000    
2020 Plan | Performance Restricted Units (PRSU)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award performance period 3 years    
2020 Plan | Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
2020 Plan | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expiration period 10 years    
2020 Plan | Restricted Stock Units (RSUs) | First vesting period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Annual award vesting (as a percent) 33.33%    
2020 Plan | Restricted Stock Units (RSUs) | Second vesting period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Annual award vesting (as a percent) 33.33%    
2020 Plan | Restricted Stock Units (RSUs) | Third vesting period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Annual award vesting (as a percent) 33.33%