Stock-Based Compensation (Tables)

3 Months Ended

Jun. 30, 2012

Share-based Compensation Arrangement by Share-based Payment Award

Schedule Of Assumptions Used In The Black-Scholes Valuation Model

The estimated assumptions used in the Black-Scholes valuation model to value our stock option grants were as follows:

	Stock Option Grants
	Three Months Ended June 30,
	2012		2011
Risk-free interest rate	0.4 - 1.0%		1.0 - 1.8%
Expected volatility	41 - 46%		40 - 41%
Weighted-average volatility	44	%	40	%
Expected term	4.4 years		4.4 years
Expected dividends	None		None

Schedule Of Assumptions Used In Monte-Carlo Simulation Model

	Three Months Ended June 30,
	2012		2011
Risk-free interest rate	0.2 - 0.4%		0.2 - 0.6%
Expected volatility	17 - 116%		14 - 83%
Weighted-average volatility	36	%	35	%
Expected dividends	None		None

Schedule Of Stock-Based Compensation Expense By Statement Of Operations

	Three Months Ended June 30,
	2012		2011
Cost of revenue	$	1	$	1
Research and development	22		23
General and administrative	9		9
Marketing and sales	7		5
Stock-based compensation expense	$	39	$	38

Employee Stock Option [Member]

Share-based Compensation Arrangement by Share-based Payment Award

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

	Options (in  thousands)		Weighted- Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Outstanding as of March 31, 2012	9,744		$	34.17
Granted	173		13.12
Exercised	(4	)	15.13
Forfeited, cancelled or expired	(446	)	40.42
Outstanding as of June 30, 2012	9,467		33.52		4.61	$	—
Exercisable as of June 30, 2012	8,594		35.10		4.23	$	—

Performance Based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award

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

	Performance- Based  Restricted Stock Units (in thousands)		Weighted- Average Grant Date Fair Value
Balance as of March 31, 2012	1,421		$	50.35
Vested	(19	)	15.39
Forfeited or cancelled	(50	)	49.60
Balance as of June 30, 2012	1,352		34.36

Restricted Stock Rights [Member]

Share-based Compensation Arrangement by Share-based Payment Award

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

	Restricted Stock Rights (in thousands)		Weighted- Average Grant Date Fair Value
Balance as of March 31, 2012	16,323		$	20.73
Granted	5,681		12.53
Vested	(3,518	)	21.79
Forfeited or cancelled	(455	)	13.30
Balance as of June 30, 2012	18,031		18.13

Market-Based Restricted Stock Units [Member]

Share-based Compensation Arrangement by Share-based Payment Award

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

	Market-Based Restricted Stock Units (in thousands)		Weighted- Average Grant Date Fair Value
Balance as of March 31, 2012	520		$	34.77
Granted	670		10.45
Vested	(111	)	34.77
Forfeited or cancelled	(62	)	34.77
Balance as of June 30, 2012	1,017		18.75