Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of weighted averages of the assumptions used in estimating the fair value of stock option awards

The weighted averages of the valuation assumptions used to determine the fair value of each option award on the date of grant and the weighted average estimated fair values were as follows:

	For the Nine Months Ended September 30,
	2021			2020
Share price at grant	$	527.49		$	290.15
Share price at exercise	$	531.24		$	290.15
Expected stock price volatility	30		%	27		%
Expected term, in years	6.2			6.0
Risk-free interest rate	0.7		%	1.4		%
Weighted average fair value of options granted	$	169.13		$	84.60