Summary of Accounting Policies (Stock Option Activity for Equity Compensation Plans) (Details) (USD $)	4 Months Ended	12 Months Ended
Aug. 11, 2009	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009	Mar. 31, 2008
Summary of Accounting Policies
Outstanding, beginning of fiscal year, Options	81,927,879	62,868,569	81,927,879	52,541,413
Granted, Options	16,900,000	2,063,748	869,600	43,586,251
Granted under option exchange program, Options			16,867,452
Exercised, Options		(6,215,867)	(2,496,254)	(2,242,639)
Forfeited, Options		(4,773,992)	(6,376,879)	(11,957,146)
Cancelled under option exchange program, Options			(27,923,229)
Outstanding, end of fiscal year, Options	27,900,000	53,942,458	62,868,569	81,927,879
Options exercisable, end of fiscal year, Options		34,237,404	24,989,665	34,329,956
Granted, Price		$ 7.21	$ 6.17	$ 6.21
Granted under option exchange program, Price			$ 5.57
Exercised, Price		$ 7.44	$ 6.54	$ 6.13
Forfeited, Price		$ 6.55	$ 9.50	$ 10.16
Cancelled under option exchange program, Price			$ 11.85
Outstanding, end of fiscal year, Price	$ 5.57
Exercise price of stock options granted each year		$ 7.61	$ 7.16	$ 9.13	$ 11.67
Options exercisable, end of fiscal year, price		$ 9.23	$ 10.71	$ 12.51

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Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period Under Option Exchange Program

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The number of shares into which fully or partially vested stock options outstanding as of the balance-sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(1)(c), d(2)

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated during the reporting period due to noncompliance with plan terms during the reporting period.

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The quantity of shares issuable on stock options awarded under the plan during the reporting period.

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance-sheet date, including vested options.

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of shares issued during the period as a result of the exercise of stock options.

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-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
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