Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2011

Basic and diluted earnings per share were computed using the following common share data (shares in millions):


	Three Months				Six Months
	Ended June 30,				Ended June 30,
	2011		2010		2011		2010

Number of common shares outstanding at end of period		472.3		478.9		472.3		478.9
Effect of using weighted average common shares outstanding		1.9		3.2		2.6		2.6

Weighted average basic common shares outstanding		474.2		482.1		474.9		481.5
Dilutive effect of equity-based compensation awards and other contingently issuable shares		1.8		3.7		2.1		3.1

Weighted average diluted common shares outstanding		476.0		485.8		477.0		484.6

Potentially issuable shares		17.3		15.7		17.3		15.7
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding		0.1		0.2		0.1		3.7