Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Basic EPS Calculation
Net Income Attributable to Chevron Corporation	$ 26,895	$ 19,024	$ 10,483
Weighted-average number of common shares outstanding	1,986	1,996	1,991
Add: Deferred awards held as stock units		1	1
Total weighted-average number of common shares outstanding	1,986	1,997	1,992
Earnings per share of common stock -basic	$ 13.54	$ 9.53	$ 5.26
Diluted EPS Calculation
Earnings available to common stockholders - Diluted	$ 26,895	$ 19,024	$ 10,483
Weighted-average number of common shares outstanding	1,986	1,996	1,991
Add: Deferred awards held as stock units		1	1
Add: Dilutive effect of employee stock-based awards	15	10	9
Total weighted-average number of common shares outstanding	2,001	2,007	2,001
Earnings per share of common stock - Diluted	$ 13.44	$ 9.48	$ 5.24

Deferred awards held as stock units.

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