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Share-Based Compensation Plans - Options Activity (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Performance-based options      
Shares (in thousands)      
Outstanding beginning balance (in shares) 174,400    
Forfeited or expired (in shares) 0    
Exercised (in shares) (174,400)    
Outstanding ending balance (in shares) 0    
Expected to vest in future periods (in shares) 0    
Weighted-Average Grant Date Fair Value Per Share      
Beginning balance (in dollars per share) $ 17.92    
Forfeited or expired (in dollars per share) 0    
Exercised (in dollars per share) 17.92    
Ending balance (in dollars per share) 0    
Outstanding beginning balance (in dollars per share) 73.45    
Forfeited or expired (in dollars per share) 0    
Exercised (in dollars per share) 73.45    
Outstanding ending balance (in dollars per share) $ 0    
Exercisable (in shares) 0 174,400 446,200
Exercisable (in dollars per share) $ 0 $ 73.45 $ 61.23
Expected to vest in future periods (in dollars per share) $ 0    
Outstanding, Aggregate Intrinsic Value (in millions) $ 0.0    
Exercisable, Aggregate Intrinsic Value (in millions) 0.0    
Expected to vest in future periods, Aggregate Intrinsic Value (in millions) $ 0.0    
Market price (in dollars per share) $ 92.77    
Time Based Vesting Option      
Shares (in thousands)      
Exercised (in shares) (93,200)    
Outstanding ending balance (in shares) 22,500    
Expected to vest in future periods (in shares) 0    
Weighted-Average Grant Date Fair Value Per Share      
Beginning balance (in dollars per share) $ 21.43    
Exercised (in dollars per share) 21.54    
Ending balance (in dollars per share) 20.98    
Exercised (in dollars per share) 79.92    
Outstanding ending balance (in dollars per share) $ 84.17    
Exercisable (in shares) 22,500 115,700 102,700
Exercisable (in dollars per share) $ 84.17 $ 80.74 $ 79.26
Expected to vest in future periods (in dollars per share) $ 0    
Outstanding, Weighted-Average Remaining Contractual Term (in years) 1 year 1 month 6 days    
Exercisable, Weighted-Average Remaining Contractual Term (in years) 1 year 1 month 6 days    
Outstanding, Aggregate Intrinsic Value (in millions) $ 0.2    
Exercisable, Aggregate Intrinsic Value (in millions) 0.2    
Expected to vest in future periods, Aggregate Intrinsic Value (in millions) $ 0.0    
Market price (in dollars per share) $ 92.77