Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Equity-Based Compensation

Summary of RSUs

		Weighted Average
		Per Share
	Units	Fair Value
Unvested as of January 1, 2021	331	$	103.84
Granted	140	$	118.11
Vested	(101)	$	85.59
Forfeited	(27)	$	114.18
Unvested as of December 31, 2021	343	$	114.28

Summary of PSUs

		Weighted Average
		Per Share
	Units	Fair Value
Unvested as of January 1, 2021	999	$	120.95
Granted	336	$	122.59
Vested	(353)	$	98.45
Forfeited	(14)	$	130.49
Unvested as of December 31, 2021	968	$	129.60

Summary of Stock Options

		Weighted Average
		Per Share
	Options	Exercise Price
Outstanding as of January 1, 2021	3,543	$	82.86
Granted	661	$	110.81
Exercised	(962)	$	68.89
Forfeited or expired	(36)	$	109.50
Outstanding as of December 31, 2021 (a)	3,206	$	92.53
Exercisable as of December 31, 2021 (b)	1,672	$	74.08

(a) Stock options outstanding as of December 31, 2021 have a weighted average remaining contractual term of 6.6 years and an aggregate intrinsic value of $238 million based on the market value of our common stock on December 31, 2021.

(b) Stock options exercisable as of December 31, 2021 have an aggregate intrinsic value of $155 million based on the market value of our common stock on December 31, 2021.

Summary of Exercisable Stock Options

		Weighted Average
		Per Share		Weighted Average
Range of Exercise Prices	Options	Exercise Price		Remaining Years
$34.94-$50.00	281	$	39.29	1.7
$50.01-$70.00	405	$	55.52	3.7
$70.01-$100.00	831	$	85.15	6.1
$100.01-$126.01	155	$	126.01	8.1
$34.94-$126.01	1,672	$	74.08	5.0

Weighted Average Assumptions Used to Value Employee Stock Options Granted

	2021		2020		2019
Expected option life	4.7	years	4.6	years	4.2	years
Expected volatility	23.2	%	16.6	%	15.5	%
Expected dividend yield	2.1	%	1.7	%	2.1	%
Risk-free interest rate	0.6	%	1.4	%	2.5	%