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Earnings Per Share

6 Months Ended

Jun. 30, 2018

Earnings Per Share

Earnings Per Share

6.    Earnings Per Share

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

		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2018		2017		2018		2017
Number of common shares outstanding at end of period		428.4		439.7		428.4		439.7
Effect of using weighted average common shares outstanding		1.5		2.2		3.2		1.9
Weighted average basic common shares outstanding		429.9		441.9		431.6		441.6
Dilutive effect of equity-based compensation awards and other contingently issuable shares		2.4		2.5		2.5		2.8
Weighted average diluted common shares outstanding		432.3		444.4		434.1		444.4
Potentially issuable shares		8.0		8.4		8.0		8.4
Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding		1.9		2.3		1.9		2.3

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- References

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- Definition

The entire disclosure for earnings per share.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-URI http://asc.fasb.org/topic&trid=2144383

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