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Share-Based Payments, Deferred Compensation and Employee Ownership Plans - Share-Based Payments and Deferred Compensation Narrative (Details) - Equity Plans - USD ($)
$ 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]      
Stock-compensation expense recognized in connection with compensation plan $ 85.0 $ 48.1 $ 34.0
Tax benefit of stock-compensation expense recognized in connection with compensation plan $ 33.5 $ 13.8 $ 8.8
Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares granted 2,500,000    
Restricted Stock | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation award, vesting period 2 years    
Restricted Stock | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation award, vesting period 5 years    
Employee Stock | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation award, vesting period 2 years    
Employee Stock | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation award, vesting period 5 years    
Expiration period 7 years    
Deferred Cash Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock compensation award, vesting period 4 years    
Deferred cash awards granted $ 36.8    
Deferred cash award, interest rate 0.70%    
Deferred cash awards, unrecognized compensation expense $ 58.3