Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Analysis of Changes in Number of Shares of Common Stock Outstanding

An analysis of changes in the number of shares of common stock outstanding follows:

	2012			2011			2010
Balance at January 1		241,008,509			242,268,903			241,679,942
Incentive Plan and Awards		449,463			189,793			300,376
Stock Options Exercised		973,270			149,385			419,846
Treasury Stock Purchased		(3,516,254	)		(1,599,572	)		(131,261	)
Balance at December 31		238,914,988			241,008,509			242,268,903