v2.4.0.6
Segment Disclosures and Related Information - Assets (Details 2) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Assets [Abstract]    
Consolidated total assets $ 117,780 $ 117,144
Alaska [Member]
   
Assets [Abstract]    
Consolidated total assets 11,241 10,950
Lower 48 and Latin America [Member]
   
Assets [Abstract]    
Consolidated total assets 28,250 28,895
Canada [Member]
   
Assets [Abstract]    
Consolidated total assets 22,306 22,308
Europe [Member]
   
Assets [Abstract]    
Consolidated total assets 15,071 15,562
Asia Pacific and Middle East [Member]
   
Assets [Abstract]    
Consolidated total assets 24,038 23,721
Other International [Member]
   
Assets [Abstract]    
Consolidated total assets 1,462 1,418
Corporate and Other [Member]
   
Assets [Abstract]    
Consolidated total assets 7,826 6,823
Discontinued operations [Member]
   
Assets [Abstract]    
Consolidated total assets $ 7,586 $ 7,467