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Other Long -Term Liabilities (Tables)
 12 Months Ended
Dec. 31, 2011
Other Long-Term Liabilities [Abstract]  
Particulars of Other long-term liabilities
                 
    2011     2010  

 

  
     

Long-term portion of income taxes payable

   $ 119     $ 116  

Long-term portion of fair value of hedges [note 21]

     41       18  

Asset retirement obligation

     36       36  

Deferred revenue

     11       15  

 

  
    $ 207     $ 185