Share-Based Employee Compensation Plans and Other Compensation and Benefit Plans (Summary Of Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Share-Based Employee Compensation Plans And Other Compensation and Benefit Plans
Outstanding at December 31, 2011, shares	7,491
Outstanding at December 31, 2011, weighted-average exercise price	$ 37.38
Granted, shares	1,045
Granted, weighted-average exercise price	$ 89.57
Exercised, shares	(1,045)
Exercised, weighted-average exercise price	$ 27.56
Forfeited, shares	(345)
Forfeited, weighted-average exercise price	$ 56.39
Outstanding at June 30, 2012, shares	7,146
Outstanding at June 30, 2012, weighted-average exercise price	$ 45.53
Exercisable at June 30, 2012, shares	3,447
Exercisable at June 30, 2012, weighted-average exercise price	$ 30.25

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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

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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.

+ References

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- Definition

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.

+ References

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- Definition

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

+ References

No definition available.

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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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- Definition

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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No definition available.

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- Definition

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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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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

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