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Other revenues (Tables)
 12 Months Ended
Dec. 31, 2012
Other revenues [Abstract]  
Other revenues
Other revenues comprise the following items:
 
 
 
Year ended December 31
 
 
(In US$ millions)
 
2012
 
 
2011
 
 
2010
 
 
 
 
 
 
 
 
 
 
 
Amortization of unfavorable contracts
 
 
-
 
 
 
24
 
 
 
39
 
Amortization of favorable contracts
 
 
(12)
 
 
 
(23
)
 
 
(13
)
Revenues related party
   
15
     
0
     
0
 
Total
 
 
3
 
 
 
1
 
 
 
26