v2.3.0.11
Earnings Per Share (Details) (USD $)
In Millions, except Per Share data
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Net income attributable to ExxonMobil (millions of dollars) $ 10,680 $ 7,560 $ 21,330 $ 13,860
Earnings per common share (dollars) $ 2.19 $ 1.61 $ 4.33 $ 2.94
Earnings per common share - assuming dilution (dollars) $ 2.18 $ 1.60 $ 4.32 $ 2.93
Earnings Per Common Share [Member]
        
Net income attributable to ExxonMobil (millions of dollars) 10,680 7,560 21,330 13,860
Weighted average number of common shares outstanding (millions of shares) 4,906 4,716 4,934 4,720
Earnings per common share (dollars) $ 2.19 $ 1.61 $ 4.33 $ 2.94
Earnings Per Common Share - Assuming Dilution [Member]
        
Net income attributable to ExxonMobil (millions of dollars) $ 10,680 $ 7,560 $ 21,330 $ 13,860
Weighted average number of common shares outstanding (millions of shares) 4,906 4,716 4,934 4,720
Effect of employee stock-based awards 6 13 7 13
Weighted average number of common shares outstanding - assuming dilution 4,912 4,729 4,941 4,733
Earnings per common share - assuming dilution (dollars) $ 2.18 $ 1.60 $ 4.32 $ 2.93