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Earnings Per Share
 12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share Basic earnings per share (EPS) is based upon “Net Income (Loss) 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 20, “Stock Options and Other Share-Based Compensation,” beginning on page 86). The table below sets forth the computation of basic and diluted EPS:
Year ended December 31
202020192018
Basic EPS Calculation
Earnings available to common stockholders - Basic1
$(5,543)$2,924 $14,824 
Weighted-average number of common shares outstanding2
1,870 1,882 1,897 
Add: Deferred awards held as stock units
— — 1 
Total weighted-average number of common shares outstanding1,870 1,882 1,898 
Earnings per share of common stock - Basic$(2.96)$1.55 $7.81 
Diluted EPS Calculation
Earnings available to common stockholders - Diluted1
$(5,543)$2,924 $14,824 
Weighted-average number of common shares outstanding2
1,870 1,882 1,897 
Add: Deferred awards held as stock units
— — 1 
Add: Dilutive effect of employee stock-based awards
— 13 16 
Total weighted-average number of common shares outstanding1,870 1,895 1,914 
Earnings per share of common stock - Diluted$(2.96)$1.54 $7.74 
1 There was no effect of dividend equivalents paid on stock units or dilutive impact of employee stock-based awards on earnings.
2 Millions of shares; 1 million shares of employee-based awards were not included in the 2020 diluted EPS calculation as the result would be anti-dilutive.