v2.4.0.6
Segment Disclosures and Related Information (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Segment Reporting Information [Line Items]        
Sales and other operating revenues $ 14,520 $ 16,506 $ 43,492 $ 49,462
Alaska [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,005 2,363 7,135 7,280
Lower 48 and Latin America Before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 4,807 6,296 14,110 17,921
Intersegment Eliminations before Lower 48 and Latin America [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues (40) (63) (196) (227)
Lower 48 and Latin America [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 4,767 6,233 13,914 17,694
Canada before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 1,288 1,595 3,580 4,681
Intersegment Eliminations before Canada [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues (117) (230) (330) (758)
Canada [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 1,171 1,365 3,250 3,923
Europe before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 3,285 3,915 10,813 12,294
Intersegment Eliminations before Europe [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 0 0 (72) (50)
Europe [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 3,285 3,915 10,741 12,244
Asia Pacific Before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,167 2,151 5,697 6,730
Intersegment Eliminations Before Asia Pacific [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues (41) (1) (41) (1)
Asia Pacific and Middle East [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,126 2,150 5,656 6,729
Other International [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 1,067 399 2,663 1,442
LUKOIL Investment [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 0 0 0 0
Corporate and Other [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues $ 99 $ 81 $ 133 $ 150