v2.4.0.8
Segment Disclosures and Related Information - Sales (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Segment Reporting Information [Line Items]        
Sales and other operating revenues $ 13,350 $ 13,664 $ 27,516 $ 28,257
Alaska [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,169 2,393 4,273 5,130
Lower 48 and Latin America Before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 4,901 4,172 9,723 9,303
Intersegment Eliminations before Lower 48 and Latin America [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues (26) (41) (55) (156)
Lower 48 and Latin America [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 4,875 4,131 9,668 9,147
Canada before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 1,405 1,074 2,660 2,292
Intersegment Eliminations before Canada [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues (155) (77) (313) (213)
Canada [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 1,250 997 2,347 2,079
Europe before Intersegment Eliminations [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,408 3,926 5,861 7,528
Intersegment Eliminations before Europe [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 0 0 0 (72)
Europe [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,408 3,926 5,861 7,456
Asia Pacific and Middle East [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 2,086 1,634 4,304 3,530
Other International [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues 457 573 940 883
Corporate and Other [Member]
        
Segment Reporting Information [Line Items]        
Sales and other operating revenues $ 105 $ 10 $ 123 $ 32