Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Narrative (Details)

v3.21.2
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted (in shares) 0  
Options, outstanding, intrinsic value $ 3.0  
Options, exercisable, intrinsic value 3.0  
Options, exercised, intrinsic value $ 18.7  
Term for outstanding stock 4 years 1 month 6 days  
Term for exercisable stock 4 years 1 month 6 days  
Performance stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted (in shares) 553,876  
Vesting period 3 years  
Actual number of shares that may be issued, percent, minimum 0.00%  
Actual number of shares that may be issued, percent, maximum 200.00%  
Incentive Award Plan    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation not yet recognized, stock options $ 20.9  
Compensation cost not yet recognized, period for recognition 2 years 1 month 6 days  
Tax benefit from compensation expense $ 5.4 $ 3.4
Incentive Award Plan | Restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted (in shares) 787,287  
Restricted stock units, conversion of stock, conversion rights (in shares) 1  
Compensation not yet recognized, stock options $ 9.8  
Compensation cost not yet recognized, period for recognition 2 years 1 month 6 days  
Employees and Officers | Incentive Award Plan | Restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Director | Incentive Award Plan | Restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 1 year