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Share-Based Compensation/Equity Awards and Purchase Plans (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Treasury Class-A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 40.2 $ 44.7 $ 54.5
Total unrecognized compensation cost from restricted stock $ 143.7    
Nonvested shares - Weighted Average Grant Date Fair Value $ 381.21 $ 460.22  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Restricted Stock Units Granted 247,367    
Restricted Stock Units - Vested (119,848)    
Restricted Stock Units - Forfeited (43,690)    
Weighted Average Grant Date Fair Value - Granted $ 328.56    
Restricted Stock Units Vested - Weighted-Average Grant-Date Fair Value 475.00    
Resticted Stock Units Cancelled/forfeited - Weighted-Average Grant-Date Fair Value $ 448.94    
Weighted Average Remaining Contractual Term (in years) 1 year 10 months 13 days    
Resticted Stock Units Outstanding Aggregate Intrinsic Value (in millions) $ 140,700,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 428,422 344,593  
Performance-based Stock Units (PSUs)      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Options Vesting Period 3 years