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Stock-Based Compensation Plans (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Jan. 01, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock available under stock option plan (in shares) 5,935,142      
Vesting period 3 years      
Options, outstanding, number (in shares) 114,943      
Weighted average exercise price (in USD per share) $ 48.63      
Remaining contractual life 2 years      
Options, grants in period, gross (in shares) 0 0    
Plan 2020        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares authorized to issue under share based compensation plans (in shares)       12,500,000
Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement age requirement to vest over original vesting period 55 years      
Time in service requirement to vest over original vesting period 10 years      
Nonvested awards, compensation cost not yet recognized $ 47.3   $ 19.2  
Equity instruments other than options, vested in period, fair value 23.6 $ 25.7    
Allocated share-based compensation expense, net of tax 6.7      
Allocated share-based compensation expense $ 8.7      
Equity instruments other than options, nonvested, number (in shares) 1,619,047   1,666,683  
Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Nonvested awards, compensation cost not yet recognized, period for recognition 36 months      
Equity instruments other than options, nonvested, number (in shares) 515,000      
Total shareholder return performance measure, as a percentage 15.00%      
Estimated vesting of shares based on performance shares (in shares) 580,000      
Minimum | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Nonvested awards, compensation cost not yet recognized, period for recognition 1 year      
Minimum | Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options, vested and expected to vest, exercisable, number (in shares) 0      
Maximum | Restricted Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Nonvested awards, compensation cost not yet recognized, period for recognition 2 years      
Maximum | Performance Shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options, vested and expected to vest, exercisable, number (in shares) 1,185,000      
Maximum | Performance Shares | Issue Date 2022 And 2021        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage 230.00%