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Earnings Per Share
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share
Basic earnings per share (EPS) is based upon “Net Income Attributable to Chevron Corporation” (“earnings”) and includes the effects of deferrals of salary and other compensation awards that are invested in Chevron stock units by certain officers and employees of the company. Diluted EPS includes the effects of these items as well as the dilutive effects of outstanding stock options awarded under the company’s stock option programs (refer to Note 19, “Stock Options and Other Share-Based Compensation,” beginning on page FS-48). The table below sets forth the computation of basic and diluted EPS:
 
Year ended December 31
 
 
2012

 
 
2011

 
2010

Basic EPS Calculation
 
 
 
 
 
 
Earnings available to common stockholders - Basic*
$
26,179

 
 
$
26,895

 
$
19,024

Weighted-average number of common shares outstanding
1,950

 
 
1,986

 
1,996

     Add: Deferred awards held as stock units
—

 
 
—

 
1

Total weighted-average number of common shares outstanding
1,950

 
 
1,986

 
1,997

Earnings per share of common stock - Basic
$
13.42

 
 
$
13.54

 
$
9.53

Diluted EPS Calculation
 
 
 
 
 
 
Earnings available to common stockholders - Diluted*
$
26,179

 
 
$
26,895

 
$
19,024

Weighted-average number of common shares outstanding
1,950

 
 
1,986

 
1,996

     Add: Deferred awards held as stock units
—

 
 
—

 
1

     Add: Dilutive effect of employee stock-based awards
15

 
 
15

 
10

Total weighted-average number of common shares outstanding
1,965

 
 
2,001

 
2,007

Earnings per share of common stock - Diluted
$
13.32

 
 
$
13.44

 
$
9.48

* There was no effect of dividend equivalents paid on stock units or dilutive impact of employee stock-based awards on earnings.