Stock-based Compensation and Employee Benefit Plans (Tables)

12 Months Ended

Mar. 31, 2011

Schedule of Assumptions Used in the Black-Scholes Valuation Model

	Stock Option Grants			ESPP
	Year Ended March 31,			Year Ended March 31,
	2011	2010	2009	2011	2010	2009
Risk-free interest rate	0.3- 2.6%	1.4- 3.1%	1.0- 3.8%	0.2- 0.3%	0.2- 0.4%	0.5- 2.1%
Expected volatility	39- 45%	40- 48%	32- 53%	34- 38%	35- 57%	35- 75%
Weighted-average volatility	42%	45%	42%	36%	39%	66%
Expected term	4.2 years	4.2 years	4.3 years	6-12 months	6-12 months	6-12 months
Expected dividends	None	None	None	None	None	None

Schedule of Share-Based Compensation Expense by Statement of Operations Line Item

	Year Ended March 31,
	2011	2010	2009
Cost of goods sold	$               2	$               2	$               2
Marketing and sales	21	16	20
General and administrative	40	33	47
Research and development	111	110	134
Restructuring and other charges	2	26	-
Stock-based compensation expense	$           176	$           187	$           203

Summary of Outstanding and Exercisable Options

	Options Outstanding				Options Exercisable
		Weighted-
		Average	Weighted-			Weighted-
	Number	Remaining	Average		Number	Average
Range of	of Shares	Contractual	Exercise	Potential	of Shares	Exercise	Potential
Exercise Prices	(in thousands)	Term (in years)	Prices	Dilution	(in thousands)	Prices	Dilution
$0.65 - $19.99	3,477	7.57	$          17.06	1.0%	1,618	$       16.95	0.5%
20.00 - 39.99	5,479	4.21	24.45	1.7%	4,353	25.31	1.3%
40.00 - 59.99	3,206	5.07	51.15	1.0%	2,773	51.23	0.8%
60.00 - 65.93	737	2.97	64.68	0.2%	737	64.68	0.2%
$0.65 - $65.93	12,899	5.26	31.39	3.9%	9,481	34.52	2.8%

Employee Stock Option [Member]

Disclosure of Share-Based Compensation Arrangements by Share-based Payment Award

	Options (in thousands)	Weighted-Average Exercise Prices	Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in millions)
Outstanding as of March 31, 2010	16,131	$              30.28
Granted	174	17.23
Exercised	(341)	16.14
Forfeited, cancelled or expired	(3,065)	26.45
Outstanding as of March 31, 2011	12,899	31.39
Vested and expected to vest	12,670	$              31.54	5.2	$                     9
Exercisable	9,481	$              34.52	4.3	$                     4

Restricted Stock Rights [Member]

Disclosure of Share-Based Compensation Arrangements by Share-based Payment Award

	Restricted Stock Rights	Weighted-Average Grant
	(in thousands)	Date Fair Values
Balance as of March 31, 2010	14,300	$                 24.45
Granted	8,090	17.38
Vested	(6,520)	21.81
Forfeited or cancelled	(1,899)	21.32
Balance as of March 31, 2011	13,971	22.01

Performance - Based Restricted Stock Units [Member]

Disclosure of Share-Based Compensation Arrangements by Share-based Payment Award

	Performance-Based Restricted Stock Units	Weighted-Average Grant
	(in thousands)	Date Fair Values
Balance as of March 31, 2010	2,326	$                  49.04
Granted	120	15.39
Forfeited or cancelled	(453)	49.11
Balance as of March 31, 2011	1,993	47.00