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Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Income Taxes (Textuals) [Abstract]        
Income Tax Expense $ 5,447 $ 3,322 $ 10,330 $ 6,392
Effective Tax Rates 41.00% 38.00% 42.00% 39.00%
Period for developments on tax matters in certain tax jurisdictions that may result in significant increases or decreases in the company's total unrecognized tax benefits (in months)     P12M