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Stock-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Recorded compensation cost for stock based payment arrangements, net of tax $ 27.0 $ 22.0 $ 36.0
Options outstanding, aggregate intrinsic value (in shares) 19.0    
Options exercisable, aggregate intrinsic value $ 3.0    
RSU or Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Performance-based Award Units Granted in 2021 (in shares) 596,391 1,355,975 1,356,303
Weighted Average Grant Date Fair Value Per Share (in dollars per share) $ 18.67 $ 10.30 $ 32.68
Restricted shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of restricted stock units and shares vested $ 14.0 $ 5.0 $ 14.0
Balance of unamortized expense $ 6.0    
Weighted average period of recognition of unamortized expense 2 years    
Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Balance of unamortized expense $ 3.0    
Weighted average period of recognition of unamortized expense 1 year    
Expiration term 10 years    
Aggregate intrinsic value of stock options exercised $ 0.8 $ 0.0 0.3
Blend of historical and implied volatility (ratio) 50.00% 50.00%  
Performance-based awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Balance of unamortized expense $ 7.0 $ 16.0  
Unamortized compensation expense 2.0    
SGI Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Balance of unamortized expense 73.0 29.0  
Corporate general and administrative expense | Performance-based awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fully vested awards that were settled in cash 7.0 3.0 8.0
Corporate general and administrative expense | SGI Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fully vested awards that were settled in cash $ 67.0 $ 25.0 $ 6.0
Executives | RSU or Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
Grants in the period (in shares) 1    
Executives | Stock options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
Executives | Performance-based awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance-based Award Units Granted in 2021 (in shares) 613,868 1,156,365 350,532
Maximum | Performance-based awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average period of recognition of unamortized expense 1 year