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Property, Plant and Equipment
9 Months Ended
Sep. 30, 2011
Property, Plant and Equipment [Abstract] 
Property, Plant and Equipment
8. Property, Plant and Equipment
     Unevaluated capitalized costs of oil and natural gas operations were as follows:
                 
    September 30,     December 31,  
    2011     2010  
    (In millions)  
U.S.
               
Acquisition
  $ 338     $ 407  
Exploration
    119       130  
 
           
Total U.S
    457       537  
 
           
Brazil & Egypt
               
Acquisition
    34       45  
Exploration
    45       203  
 
           
Total Brazil & Egypt
    79       248  
 
           
Worldwide
  $ 536     $ 785  
 
           
     During the quarter and nine months ended September 30, 2011, we released approximately $42 million and $86 million of our unevaluated capitalized costs to our Brazilian full cost pool upon the completion of our evaluation of certain exploratory wells drilled in 2009 and 2010. During the third quarter of 2011, we also released approximately $94 million related to a certain Brazilian development project where we were recently denied a necessary environmental permit. These actions contributed to a ceiling test charge recorded on the Brazilian full cost pool during the third quarter of 2011. See Note 3 for a further discussion. At September 30, 2011, we have total oil and natural gas capitalized costs of approximately $207 million and $71 million in Brazil and Egypt, of which $8 million and $71 million are unevaluated capitalized costs.