Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Compensation [Abstract]

Schedule of restricted stock units

The following table presents RSU activity (including PBRSUs that have been earned) under our equity incentive plans as of and for the year ended December 31, 2019 (in millions except per share amounts):

	Units		Weighted Average Grant-Date Fair Value (per share)
Outstanding as of January 1, 2019	34		$	33.59
Awarded and assumed	19		$	37.61
Vested	(17	)	$	31.67
Forfeited	(8	)	$	35.50
Outstanding as of December 31, 2019	28		$	36.82
Expected to vest as of December 31, 2019	23

Schedule of stock-based compensation expense

The following table presents stock-based compensation expense for the years ended December 31, 2019, 2018 and 2017 (in millions):  

	Year Ended December 31,
	2019		2018		2017
Cost of net revenues	$	55	$	59	$	53
Sales and marketing	97		111		94
Product development	198		197		178
General and administrative	155		171		158
Total stock-based compensation expense	$	505	$	538	$	483
Capitalized in product development	$	14	$	14	$	14