XML 61 R44.htm IDEA: XBRL DOCUMENT v3.10.0.1
Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share  
Common Share Data Used for Computing Basic and Diluted Earnings Per Share

Basic and diluted earnings per share were computed using the following common share data for the years ended December 31 (shares in millions):

 

 

 

 

 

 

 

 

    

2018

    

2017

    

2016

Number of common shares outstanding at end of period

 

424.0

 

433.3

 

439.3

Effect of using weighted average common shares outstanding

 

5.1

 

5.5

 

4.2

Weighted average basic common shares outstanding

 

429.1

 

438.8

 

443.5

Dilutive effect of equity-based compensation awards and other contingently issuable shares (a)

 

3.1

 

3.1

 

3.0

Weighted average diluted common shares outstanding

 

432.2

 

441.9

 

446.5

Potentially issuable shares

 

7.4

 

8.1

 

9.8

Number of anti-dilutive potentially issuable shares excluded from diluted common shares outstanding

 

1.5

 

1.9

 

1.0

(a)As of January 1, 2017, we adopted ASU 2016-09 prospectively and no longer include excess tax benefits as assumed proceeds.