Stock-Based Plans (Tables)

9 Months Ended

Sep. 30, 2013

Stock-Based Plans Disclosure [Abstract]

Schedule of stock option activity

The following table summarizes stock option activity for the nine months ended September 30, 2013:  

	Options
	(In millions)
Outstanding as of January 1, 2013	24
Granted and assumed	1
Exercised	(8	)
Forfeited/expired/canceled	(1	)
Outstanding as of September 30, 2013	16

Schedule of restricted stock unit activity

The following table summarizes restricted stock unit ("RSU") activity for the nine months ended September 30, 2013:  

	Units
	(In millions)
Outstanding as of January 1, 2013	39
Awarded and assumed	13
Vested	(14	)
Forfeited	(3	)
Outstanding as of September 30, 2013	35

Schedule of stock-based compensation expense

The impact on our results of operations of recording stock-based compensation expense for the three and nine months ended September 30, 2013 and 2012 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
	(In millions)
Cost of net revenues	$	9	$	13	$	45	$	41
Sales and marketing	38		35		112		99
Product development	42		34		120		101
General and administrative	51		40		135		119
Total stock-based compensation expense	$	140	$	122	$	412	$	360
Capitalized in product development	$	4	$	5	$	11	$	15

Weighed average assumptions

The following weighted average assumptions were used for the three and nine months ended September 30, 2013 and 2012:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2013		2012		2013		2012
Risk-free interest rate	0.77	%	0.48	%	0.62	%	0.71	%
Expected life (in years)	3.9		3.8		4.1		4.0
Dividend yield	—	%	—	%	—	%	—	%
Expected volatility	32	%	40	%	34	%	38	%