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Litigation and Other Contingencies (Tables)
6 Months Ended
Jun. 30, 2011
Litigation and Other Contingencies  
Schedule of Guarantees
     As of June 30, 2011  
     Equity
Company
Obligations
     Other
Third Party
Obligations
     Total  
     (millions of dollars)  

Total guarantees

   $ 6,433       $ 3,185       $ 9,618