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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of type and fair value of the stock-based compensation awards granted during the period
The following table illustrates the type and fair value of the stock-based compensation awards granted during the nine months ended September 30, 2020 and 2019, respectively:
 Nine Months Ended September 30, 2020Nine Months Ended September 30, 2019
 Shares GrantedWeighted-Average Fair Value Per ShareWeighted-Average Grant Date Stock PriceShares GrantedWeighted-Average Fair Value Per ShareWeighted-Average Grant Date Stock Price
Stock options1,913,888 $25.98 $127.60 1,499,524 $40.98 $138.35 
RSUs705,287 $127.60 $127.60 657,389 $138.35 $138.35 
PRSUs371,641 $127.60 $127.60 342,097 $138.35 $138.35 
Schedule providing assumptions used in determining the fair value of stock-based awards
The following table provides the assumptions used in determining the fair value of the stock-based awards for the nine months ended September 30, 2020 and 2019, respectively:
 
 Grant Year
 20202019
Weighted-average dividend yield2.47%2.56%
Weighted-average volatility25.7%29.1%
Range of volatilities
24.5% -29.7%
25.1% -38.7%
Range of risk-free interest rates
1.21% -1.39%
2.48% -2.68%
Weighted-average expected lives8 years7 years