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Accounting for Stock-based Compensation (Details Textual) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per share of stock options		$ 1.12
Options granted with vesting terms		3,942,500
Accounting for Stock Based Compensation (Textual) [Abstract]
Number of restricted stock units		50,600
Fair value of restricted stock units	$ 230,000,000
Number of restricted stock options		62,700
Weighted average vesting period for unrecognized compensation cost		1 year 10 months 24 days
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to non vested stock options	14,000,000	14,000,000
Restricted Stock Units (RSUs) [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost related to non vested stock options	11,500,000	11,500,000
Unrecognized expenses milestones not considered probable of achievement	3,700,000	3,700,000
Fair value per share of stock options		$ 1.69
Vesting percentage of unvest		25.00%
Performance Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized expenses milestones not considered probable of achievement	$ 128,000,000	$ 128,000,000
Fair value per share of stock options		$ 0.60
Vesting percentage of unvest		25.00%

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Employee service share based compensation nonvested awards aggregate compensation cost not yet recognized not considered probable of achievement.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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-Publisher FASB

-Name Accounting Standards Codification

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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