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Impairments
3 Months Ended
Mar. 31, 2013
Impairments [Abstract]  
Impairments
Note 9—Impairments
      
During the three-month periods of 2013 and 2012, we recognized the following before-tax impairment
charges:
      
  Millions of Dollars
   Three Months Ended
March 31
   2013 2012
      
Canada $ -  213
Europe   -  1
Asia Pacific and Middle East   2  -
  $ 2  214

The first quarter of 2012 included a $213 million property impairment in our Canada segment for the carrying value of capitalized project development costs associated with our Mackenzie Gas Project. Advancement of the project was suspended indefinitely in the first quarter of 2012 due to a continued decline in market conditions and the lack of acceptable commercial terms. We also recorded a $481 million impairment for the undeveloped leasehold costs associated with the project, which was included in the “Exploration expenses” line on our consolidated income statement.