Long-Term Compensation (Details) (USD $)	6 Months Ended
Jun. 30, 2012
Stock option activity
Number of Options, Beginning balance	9,879,960
Weighted Average Exercise Price, Beginning	$ 34.93
Exercised	(1,050,158)
Weighted Average Exercise Price, Exercised	$ 22.28
Weighted Average Exercise Price, Forfeited	$ 43.79
Number of options forfeited	(113,917)
Number of Options, Ending balance	8,715,885
Weighted Average Exercise Price, Ending Balance	$ 36.34
Options Exercisable, Number of Options Ending balance	8,122,335

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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.

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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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- Definition

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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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No definition available.

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Number of share options (or share units) exercised during the current period.

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