v2.4.0.6
Segment Disclosures and Related Information (Details 1) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips $ 1,798 $ 2,616 $ 7,002 $ 9,046  
Total Assets          
Total Assets 115,369   115,369   153,230 [1]
Alaska [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 535 502 1,706 1,558  
Total Assets          
Total Assets 11,062 10,723 11,062 10,723  
Lower 48 and Latin America [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 182 334 556 996  
Total Assets          
Total Assets 28,444 25,872 28,444 25,872  
Canada [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips (31) 73 (674) 201  
Total Assets          
Total Assets 22,075 20,847 22,075 20,847  
Europe [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 132 266 1,190 1,265  
Total Assets          
Total Assets 14,305 12,452 14,305 12,452  
Asia Pacific and Middle East [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 669 469 3,179 2,288  
Total Assets          
Total Assets 23,532 22,374 23,532 22,374  
Other International [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 567 53 634 251  
Total Assets          
Total Assets 9,741 9,070 9,741 9,070  
LUKOIL Investment [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 0 0 0 239  
Total Assets          
Total Assets 0 0 0 0  
Corporate and Other [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips (257) (215) (836) (728)  
Total Assets          
Total Assets 6,210 8,485 6,210 8,485  
Discontinued operations [Member]
          
Net Income Attributable to ConocoPhillips          
Consolidated net income attributable to ConocoPhillips 1 1,134 1,247 2,976  
Total Assets          
Total Assets $ 0 $ 43,407 $ 0 $ 43,407  
[1] **Certain amounts have been restated to reflect a prior period adjustment. See Note 16—Accumulated Other Comprehensive Income, in the Notes to Consolidated Financial Statements.