Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Additional Stock-Based Compensation Disclosures

Stock-based compensation expense and the related tax benefits were as follows:

	2019		2018		2017
Stock-based compensation expense	$	306.8	$	253.5	$	256.3
Tax benefit	64.4		53.2		64.1

Share-based Compensation Awards, Fair Value Assumptions Used

The weighted-average fair values of the SVA units granted during the years ended December 31, 2019, 2018, and 2017 were $95.01, $48.51, and $66.25, respectively, determined using the following assumptions:

(Percents)	2019		2018		2017
Expected dividend yield	2.50	%	2.50	%	2.50	%
Risk-free interest rate	2.46		2.31		1.38
Volatility	21.00		22.26		22.91