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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Additional Stock-Based Compensation Disclosures
Stock-based compensation expense and the related tax benefits were as follows:
202120202019
Stock-based compensation expense$342.8 $308.1 $306.8 
Tax benefit72.0 64.7 64.4 
Share-based Compensation Awards, Fair Value Assumptions Used The weighted-average fair values of the SVA units granted during the years ended December 31, 2021, 2020, and 2019 were $230.19, $139.14, and $95.01, respectively, determined using the following assumptions:
(Percents)202120202019
Expected dividend yield2.50 %2.50 %2.50 %
Risk-free interest rate0.19 1.38 2.46 
Volatility31.42 20.90 21.00 
The weighted-average fair value of the RVA units granted during the years ended December 31, 2021 and 2020 were $286.71 and $179.90, respectively, determined using the following assumptions:
(Percents)20212020
Expected dividend yield2.50 %2.50 %
Risk-free interest rate0.19 1.38 
Volatility30.95 19.89