Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

Disclosure of Compensation Related Costs, Share-based Payments [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 three months ended March 31, 2019 and 2018, respectively:

	Three Months Ended March 31, 2019					Three Months Ended March 31, 2018
	Shares Granted	Weighted-Average Fair Value Per Share		Weighted-Average Grant Date Stock Price		Shares Granted	Weighted-Average Fair Value Per Share		Weighted-Average Grant Date Stock Price
Stock options	1,499,524	$	40.98	$	138.35	1,566,788	$	46.18	$	151.12
RSUs	657,389	$	138.35	$	138.35	676,228	$	151.12	$	151.12
PRSUs	342,097	$	138.35	$	138.35	339,559	$	151.12	$	151.12

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 three months ended March 31, 2019 and 2018, respectively:

	Grant Year
	2019		2018
Weighted-average dividend yield	2.56	%	2.70	%
Weighted-average volatility	29.1	%	30.2	%
Range of volatilities	25.1-38.7%		21.5-33.0%
Range of risk-free interest rates	2.48-2.68%		2.02-2.87%
Weighted-average expected lives	7 years		8 years