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Income Taxes (Detail) (USD $)
In Millions
12 Months Ended
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Income Before Income Taxes      
United States $ 2,778 $ 2,338 $ 2,251
International 2,977 2,294 2,857
Income before income taxes $ 5,755 $ 4,632 $ 5,108