v2.4.0.6
Supplementary Information - Condensed Consolidating Financial Information - Bal Sheet (Details 1) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Assets        
Cash and cash equivalents $ 5,422 $ 3,618 $ 3,707 $ 5,780
Restricted cash   748    
Short-term investments 23 [1]      
Accounts and notes receivable 8,898 9,182    
Inventories 1,133 965    
Prepaid expenses and other current assets 8,759 9,476    
Total Current Assets 24,235 23,989    
Investments, loans and long-term receivables 24,770 25,006    
Net properties, plants and equipment 67,890 67,263    
Other assets 885 886    
Total Assets 117,780 117,144    
Liabilities and Stockholders' Equity        
Accounts payable 10,421 10,013    
Short-term debt 1,351 955    
Accrued income and other taxes 3,658 3,366    
Employee benefit obligations 432 742    
Other accruals 2,453 2,367    
Total Current Liabilities 18,315 17,443    
Long-term debt 20,319 20,770    
Asset retirement obligations and accrued environmental costs 8,650 8,947    
Joint venture acquisition obligation-related party 2,610 2,810    
Deferred income taxes 13,607 13,185    
Employee benefit obligations 3,271 3,346    
Other liabilities and deferred credits 1,768 2,216    
Total Liabilities 68,540 68,717    
Retained earnings 36,662 35,338    
Other common stockholders' equity 12,141 12,649    
Noncontrolling interests 437 440    
Total Liabilities and Stockholders' Equity 117,780 117,144    
ConocoPhillips [Member]
        
Assets        
Cash and cash equivalents   2    
Restricted cash   748    
Accounts and notes receivable 62 64    
Prepaid expenses and other current assets 18 19    
Total Current Assets 80 833    
Investments, loans and long-term receivables 82,784 80,910    
Other assets 48 55    
Total Assets 82,912 81,798    
Liabilities and Stockholders' Equity        
Short-term debt 395 (5)    
Other accruals 119 209    
Total Current Liabilities 514 204    
Long-term debt 9,051 9,453    
Deferred income taxes 54 15    
Other liabilities and deferred credits 31,327 30,938    
Total Liabilities 40,946 40,610    
Retained earnings 30,100 28,815    
Other common stockholders' equity 11,866 12,373    
Total Liabilities and Stockholders' Equity 82,912 81,798    
ConocoPhillips Company [Member]
        
Assets        
Cash and cash equivalents 279 12 169 2,028
Accounts and notes receivable 6,273 6,247    
Inventories 87 57    
Prepaid expenses and other current assets 592 847    
Total Current Assets 7,231 7,163    
Investments, loans and long-term receivables 118,108 114,314    
Net properties, plants and equipment 8,849 8,771    
Other assets 219 216    
Total Assets 134,407 130,464    
Liabilities and Stockholders' Equity        
Accounts payable 8,710 9,067    
Short-term debt 4 4    
Accrued income and other taxes 158 104    
Employee benefit obligations 294 485    
Other accruals 655 636    
Total Current Liabilities 9,821 10,296    
Long-term debt 5,213 5,215    
Asset retirement obligations and accrued environmental costs 1,253 1,250    
Deferred income taxes 292 598    
Employee benefit obligations 2,446 2,464    
Other liabilities and deferred credits 22,689 19,916    
Total Liabilities 41,714 39,739    
Retained earnings 26,618 24,041    
Other common stockholders' equity 66,075 66,684    
Total Liabilities and Stockholders' Equity 134,407 130,464    
ConocoPhillips Australia Funding Company [Member]
        
Assets        
Cash and cash equivalents 6 6 1 1
Total Current Assets 6 6    
Investments, loans and long-term receivables 771 759    
Total Assets 777 765    
Liabilities and Stockholders' Equity        
Accounts payable 1      
Short-term debt 750 750    
Other accruals 19 9    
Total Current Liabilities 770 759    
Total Liabilities 770 759    
Retained earnings 5 4    
Other common stockholders' equity 2 2    
Total Liabilities and Stockholders' Equity 777 765    
ConocoPhillips Canada Funding Company I [Member]
        
Assets        
Cash and cash equivalents 48 50 37 38
Prepaid expenses and other current assets 1 1    
Total Current Assets 49 51    
Investments, loans and long-term receivables 1,443 1,455    
Other assets 2 2    
Total Assets 1,494 1,508    
Liabilities and Stockholders' Equity        
Accounts payable 3 4    
Accrued income and other taxes 4 3    
Other accruals 32 15    
Total Current Liabilities 39 22    
Long-term debt 1,250 1,250    
Deferred income taxes 14 16    
Other liabilities and deferred credits 95 117    
Total Liabilities 1,398 1,405    
Retained earnings (54) (78)    
Other common stockholders' equity 150 181    
Total Liabilities and Stockholders' Equity 1,494 1,508    
ConocoPhillips Canada Funding Company II [Member]
        
Assets        
Cash and cash equivalents 2 2 1 1
Total Current Assets 2 2    
Investments, loans and long-term receivables 573 578    
Other assets 3 3    
Total Assets 578 583    
Liabilities and Stockholders' Equity        
Accounts payable 1 1    
Other accruals 13 4    
Total Current Liabilities 14 5    
Long-term debt 499 499    
Deferred income taxes 8 7    
Other liabilities and deferred credits 36 50    
Total Liabilities 557 561    
Retained earnings (62) (73)    
Other common stockholders' equity 83 95    
Total Liabilities and Stockholders' Equity 578 583    
All Other Subsidiaries [Member]
        
Assets        
Cash and cash equivalents 5,087 3,546 3,499 3,712
Short-term investments 23      
Accounts and notes receivable 7,544 7,958    
Inventories 1,046 908    
Prepaid expenses and other current assets 8,148 8,609    
Total Current Assets 21,848 21,021    
Investments, loans and long-term receivables 43,986 44,739    
Net properties, plants and equipment 59,041 58,492    
Other assets 613 610    
Total Assets 125,488 124,862    
Liabilities and Stockholders' Equity        
Accounts payable 6,687 6,028    
Short-term debt 202 206    
Accrued income and other taxes 3,496 3,259    
Employee benefit obligations 138 257    
Other accruals 1,615 1,494    
Total Current Liabilities 12,138 11,244    
Long-term debt 4,306 4,353    
Asset retirement obligations and accrued environmental costs 7,397 7,697    
Joint venture acquisition obligation-related party 2,610 2,810    
Deferred income taxes 13,239 12,549    
Employee benefit obligations 825 882    
Other liabilities and deferred credits 18,580 21,174    
Total Liabilities 59,095 60,709    
Retained earnings 33,419 30,778    
Other common stockholders' equity 32,537 32,935    
Noncontrolling interests 437 440    
Total Liabilities and Stockholders' Equity 125,488 124,862    
Consolidating Adjustments [Member]
        
Assets        
Accounts and notes receivable (4,981) (5,087)    
Total Current Assets (4,981) (5,087)    
Investments, loans and long-term receivables (222,895) (217,749)    
Total Assets (227,876) (222,836)    
Liabilities and Stockholders' Equity        
Accounts payable (4,981) (5,087)    
Total Current Liabilities (4,981) (5,087)    
Other liabilities and deferred credits (70,959) (69,979)    
Total Liabilities (75,940) (75,066)    
Retained earnings (53,364) (48,149)    
Other common stockholders' equity (98,572) (99,621)    
Total Liabilities and Stockholders' Equity $ (227,876) $ (222,836)    
[1] *Marketable securities.