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Investments, Advances And Long-Term Receivables (Tables)
 12 Months Ended
Dec. 31, 2011
Investments, Advances And Long-Term Receivables [Abstract]  
Schedule Of Investments, Advances And Long-Term Receivables
       

Dec. 31,

2011

        Dec. 31,
2010		  
       (millions of dollars)  

Companies carried at equity in underlying assets

          

Investments

      $ 16,968         $ 17,429   

Advances

        9,740           9,286   

Total equity company investments and advances

      $ 26,708         $ 26,715   

Companies carried at cost or less and stock investments carried at fair value

        1,544           1,557   

Long-term receivables and miscellaneous investments at cost or less, net of reserves of $469 million and $292 million

        6,081           7,066   

Total

      $ 34,333         $ 35,338