v2.3.0.15
Earnings Per Share (Details) (USD $)
In Millions, except Per Share data
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Earnings from continuing operations$ 1,040$ 429$ 1,613$ 1,855
Basic earnings per share$ 2.51$ 0.99$ 3.83$ 4.20
Diluted earnings per share$ 2.50$ 0.98$ 3.82$ 4.18
Antidilutive securities excluded from computation of earnings per share, amount5.38.63.17.9
Earnings [Member]
    
Earnings from continuing operations1,0404291,6131,855
Attributable to participating securities(11)(4)(16)(21)
Basic earnings per share1,0294251,5971,834
Diluted earnings per share$ 1,029$ 425$ 1,597$ 1,834
Common Stock [Member]
    
Earnings from continuing operations, in shares414435421442
Attributable to participating securities, in shares(4)(5)(4)(5)
Basic earnings per share, shares410430417437
Dilutive effect of potential common shares issuable upon the exercise of outstanding stock options, in shares1112
Diluted earnings per share, shares411431418439
Earnings Per Share [Member]
    
Basic earnings per share$ 2.51$ 0.99$ 3.83$ 4.20
Diluted earnings per share$ 2.50$ 0.98$ 3.82$ 4.18