Share-Based Payments (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Stock option activity is as follows:


	Number of shares (in thousands)	Weighted-average exercise price per stock option		Weighted-average remaining contractual term (in years)	Aggregate intrinsic value (in millions)
Outstanding stock options at December 31, 2020	11,297	$	53.84
Granted	754	92.56
Exercised	(1,677)	46.27
Forfeited	(700)	63.58
Expired	(18)	56.58
Outstanding stock options at September 30, 2021	9,656	$	57.47	7.18	$	211
Vested and expected to vest at September 30, 2021	9,260	$	56.62	7.10	$	208
Exercisable at September 30, 2021	5,015	$	45.46	6.00	$	160

Schedule of Restricted Stock Units Activity

The following table summarizes our RSU activity with performance-based RSUs, including those with market conditions, presented at 100% of the target level shares that may potentially vest (amounts in thousands, except per share data):


	Number of shares	Weighted- average grant date fair value per RSU
Unvested RSUs at December 31, 2020	7,102	$	82.50
Granted	4,657	95.05
Vested	(3,177)	96.63
Forfeited	(1,085)	72.94
Unvested RSUs at September 30, 2021	7,497	$	86.71