v2.4.0.6
Segment information (Condensed Statements Of Comprehensive Earnings And Balance Sheets Of Reportable Segments) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Segment Reporting Information [Line Items]            
Oil, gas and NGL sales $ 1,617   $ 2,200 $ 3,532 $ 4,060  
Oil, gas and NGL derivatives 665   416 810 248  
Marketing and midstream revenues 277   604 714 1,059  
Depreciation, depletion and amortization 684   550 1,364 1,056  
Interest expense 99   85 186 166  
Earnings from continuing operations before income taxes 734   1,378 1,345 1,958  
Income tax expense (benefit) 257   1,194 454 1,385  
Earnings from continuing operations 477   184 891 573  
Property and equipment, net 27,241 [1]   22,427 27,241 [1] 22,427 24,774
Total continuing assets 43,470   38,407 [1] 43,470 38,407 [1] 41,117
Capital expenditures 2,369   1,833 4,714 [2] 3,631  
Assets held for sale 0   130 0 130  
Revision of estimated obligation   399   399 16  
U.S. [Member]
            
Segment Reporting Information [Line Items]            
Oil, gas and NGL sales 1,014   1,438 2,250 2,650  
Oil, gas and NGL derivatives 665   416 810 248  
Marketing and midstream revenues 250   554 649 977  
Depreciation, depletion and amortization 439   350 870 668  
Interest expense 84   40 155 77  
Earnings from continuing operations before income taxes 727   1,148 1,260 1,586  
Income tax expense (benefit) 259   1,135 444 1,290  
Earnings from continuing operations 468   13 816 296  
Property and equipment, net 18,818 [1]   14,472 18,818 [1] 14,472  
Total continuing assets 24,916   19,972 [1] 24,916 19,972 [1]  
Capital expenditures 1,985   1,499 3,531 [2] 2,751  
Revision of estimated obligation       110    
Canada [Member]
            
Segment Reporting Information [Line Items]            
Oil, gas and NGL sales 603   762 1,282 1,410  
Marketing and midstream revenues 27   50 65 82  
Depreciation, depletion and amortization 245   200 494 388  
Interest expense 15   45 31 89  
Earnings from continuing operations before income taxes 7   230 85 372  
Income tax expense (benefit) (2)   59 10 95  
Earnings from continuing operations 9   171 75 277  
Property and equipment, net 8,423 [1]   7,955 8,423 [1] 7,955  
Total continuing assets 18,554   18,435 [1] 18,554 18,435 [1]  
Capital expenditures 384   334 1,183 [2] 880  
Revision of estimated obligation       $ 289    
[1] Amounts in the table above do not include assets held for sale related to Devon’s discontinued operations, which totaled $130 million at June 30, 2011. There were no assets held for sale at June 30, 2012.
[2] Capital expenditures for the first six months of 2012 presented above include the $399 million revision to Devon’s asset retirement obligations presented in Note 14. Of the $399 million, $110 million relates to the U.S. and $289 million relates to Canada.