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Stockholders' Equity (Reconciliation Of Denominators Used In The Computation Of Basic And Diluted Earnings Per Share) (Details)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Stockholders' Equity [Abstract]
Basic-weighted average shares outstanding	295,538,402	294,861,424
Weighted shares assumed upon exercise of stock options	1,388,821	567,518
Diluted-weighted average shares outstanding	296,927,223	295,428,942

X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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