Stock-Based Compensation (Tables)

3 Months Ended

Jun. 30, 2013

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule Of Assumptions Used In Monte-Carlo Simulation Model

The estimated assumptions used in the Monte-Carlo simulation model to value our market-based restricted stock units were as follows:

	Three Months Ended June 30,
	2013		2012
Risk-free interest rate	0.4	%	0.2 - 0.4%
Expected volatility	16 - 58%		17 - 116%
Weighted-average volatility	31	%	36	%
Expected dividends	None		None

Schedule Of Stock-Based Compensation Expense By Statement Of Operations

The following table summarizes stock-based compensation expense resulting from stock options, restricted stock, restricted stock units and the ESPP included in our Condensed Consolidated Statements of Operations (in millions):

	Three Months Ended June 30,
	2013		2012
Cost of revenue	$	—	$	1
Research and development(a)	20		21
Marketing and sales (a)	7		7
General and administrative (a)	6		10
Stock-based compensation expense	$	33	$	39

Employee Stock Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure Of Stock-Based Compensation Arrangements By Stock-Based Payment Award

The following table summarizes our stock option activity for the three months ended June 30, 2013:

	Options (in thousands)		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Outstanding as of March 31, 2013	7,802		$	34.17
Granted	4		17.30
Exercised	(1,227	)	17.55
Forfeited, cancelled or expired	(383	)	46.39
Outstanding as of June 30, 2013	6,196		36.70		4.11	$	13
Vested and expected to vest	6,165		36.79		4.08	$	12
Exercisable as of June 30, 2013	5,844		37.89		3.89	$	10

Restricted Stock Rights [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure Of Stock-Based Compensation Arrangements By Stock-Based Payment Award

The following table summarizes our restricted stock rights activity, excluding performance-based and market-based restricted stock unit activity discussed below, for the three months ended June 30, 2013:

	Restricted Stock Rights (in thousands)		Weighted- Average Grant Date Fair Value
Balance as of March 31, 2013	15,918		$	16.85
Granted	5,980		22.31
Vested	(4,424	)	17.46
Forfeited or cancelled	(637	)	16.90
Balance as of June 30, 2013	16,837		18.63

Performance Based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure Of Stock-Based Compensation Arrangements By Stock-Based Payment Award

The following table summarizes our performance-based restricted stock unit activity for the three months ended June 30, 2013:

	Performance- Based Restricted Stock Units (in thousands)		Weighted- Average Grant Date Fair Value
Balance as of March 31, 2013	1,324		$	51.54
Vested	(36	)	15.39
Forfeited or cancelled	(125	)	49.60
Balance as of June 30, 2013	1,163		52.87

Market-Based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Disclosure Of Stock-Based Compensation Arrangements By Stock-Based Payment Award

The following table summarizes our market-based restricted stock unit activity for the three months ended June 30, 2013.

	Market-Based Restricted Stock Units (in thousands)		Weighted- Average Grant Date Fair Value
Balance as of March 31, 2013	925		$	19.16
Granted	555		29.52
Vested	(304	)	16.01
Forfeited or cancelled	(114	)	24.93
Balance as of June 30, 2013	1,062		24.86