v2.4.0.6
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
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Net income attributable to ExxonMobil $ 41,060 $ 30,460 $ 19,280
Earnings per common share (dollars) $ 8.43 $ 6.24 $ 3.99
Earnings per common share - assuming dilution (dollars) $ 8.42 $ 6.22 $ 3.98
Dividends paid per common share (dollars) $ 1.85 $ 1.74 $ 1.66
Earnings Per Common Share [Member]
      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Net income attributable to ExxonMobil 41,060 30,460 19,280
Weighted average number of common shares outstanding 4,870 4,885 4,832
Earnings per common share (dollars) $ 8.43 $ 6.24 $ 3.99
Earnings Per Common Share - Assuming Dilution [Member]
      
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]      
Net income attributable to ExxonMobil $ 41,060 $ 30,460 $ 19,280
Weighted average number of common shares outstanding 4,870 4,885 4,832
Effect of employee stock-based awards 5 12 16
Weighted average number of common shares outstanding - assuming dilution 4,875 4,897 4,848
Earnings per common share - assuming dilution (dollars) $ 8.42 $ 6.22 $ 3.98