v2.4.0.6
Supplementary Information - Condensed Consolidating Financial Information (Details 2) (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities $ 9,846 $ 11,396
Net cash provided by (used in) discontinued operations 206 2,438
Net Cash Provided by (Used in) Operating Activities 10,052 13,834
Cash Flows From Investing Activities    
Capital expenditures and investments (11,337) (8,747)
Proceeds from asset dispositions 2,088 1,954
Net sales (purchases) of short-term investments 597 (1,623)
Long-term advances/loans-related parties (19) (14)
Collection of advances/loans-related parties 100 88
Other 177 39
Net cash Provided by (used in) continuing investing activities (8,394) (8,303)
Net cash provided by (used in) discontinued operations (304) 164
Net Cash Provided by (Used in) Investing Activities (8,698) (8,139)
Cash Flows From Financing Activities    
Issuance of debt 485 0
Repayment of debt (1,668) (419)
Special cash distribution from Phillips 66 7,818 0
Change in restricted cash (2,468) 0
Issuance of company common stock 83 109
Repurchase of company common stock (5,098) (7,984)
Dividends paid (2,469) (2,761)
Other (547) (542)
Net cash providec by (used in) continuing financing activities (3,864) (11,597)
Net cash provided by (used in) discontinued operations (2,019) (21)
Net Cash Providec by (Used in) Financing Activities (5,883) (11,618)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 17 (94)
Net Change in Cash and Cash Equivalents (4,512) (6,017)
Cash and cash equivalents at beginning of period 5,780 [1] 9,454
Cash and Cash Equivalents at End of Period 1,268 3,437
ConocoPhillips [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities 3,530 10,645
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Operating Activities 3,530 10,645
Cash Flows From Investing Activities    
Capital expenditures and investments (317) 0
Proceeds from asset dispositions 14 0
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 (1)
Other 0 0
Net cash Provided by (used in) continuing investing activities (303) (1)
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Investing Activities (303) (1)
Cash Flows From Financing Activities    
Issuance of debt 485 0
Repayment of debt (1,576) 0
Special cash distribution from Phillips 66 7,818  
Change in restricted cash (2,468)  
Issuance of company common stock 83 109
Repurchase of company common stock (5,098) (7,984)
Dividends paid (2,469) (2,761)
Other (1) (8)
Net cash providec by (used in) continuing financing activities (3,226) (10,644)
Net cash provided by (used in) discontinued operations 0 0
Net Cash Providec by (Used in) Financing Activities (3,226) (10,644)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 1 0
Cash and cash equivalents at beginning of period 0 0
Cash and Cash Equivalents at End of Period 1 0
ConocoPhillips Company [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities 12,353 (3,087)
Net cash provided by (used in) discontinued operations 397 (181)
Net Cash Provided by (Used in) Operating Activities 12,750 (3,268)
Cash Flows From Investing Activities    
Capital expenditures and investments (5,558) (1,092)
Proceeds from asset dispositions 933 318
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties (74) (113)
Collection of advances/loans-related parties 133 622
Other 4 5
Net cash Provided by (used in) continuing investing activities (4,562) (260)
Net cash provided by (used in) discontinued operations (232) 191
Net Cash Provided by (Used in) Investing Activities (4,794) (69)
Cash Flows From Financing Activities    
Issuance of debt 3,000 4,558
Repayment of debt (9,241) (1,807)
Special cash distribution from Phillips 66 0  
Change in restricted cash 0  
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 0
Other 63 54
Net cash providec by (used in) continuing financing activities (6,178) 2,805
Net cash provided by (used in) discontinued operations (3,786) (14)
Net Cash Providec by (Used in) Financing Activities (9,964) 2,791
Effect of Exchange Rate Changes on Cash and Cash Equivalents (8) (10)
Net Change in Cash and Cash Equivalents (2,016) (556)
Cash and cash equivalents at beginning of period 2,028 718
Cash and Cash Equivalents at End of Period 12 162
ConocoPhillips Australia Funding Company [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities 2 2
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Operating Activities 2 2
Cash Flows From Investing Activities    
Capital expenditures and investments 0 0
Proceeds from asset dispositions 0 0
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 0
Other 0 0
Net cash Provided by (used in) continuing investing activities 0 0
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Investing Activities 0 0
Cash Flows From Financing Activities    
Issuance of debt 0 0
Repayment of debt 0 0
Special cash distribution from Phillips 66 0  
Change in restricted cash 0  
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 0
Other 0 0
Net cash providec by (used in) continuing financing activities 0 0
Net cash provided by (used in) discontinued operations 0 0
Net Cash Providec by (Used in) Financing Activities 0 0
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 2 2
Cash and cash equivalents at beginning of period 1 0
Cash and Cash Equivalents at End of Period 3 2
ConocoPhillips Canada Funding Company I [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities 7 6
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Operating Activities 7 6
Cash Flows From Investing Activities    
Capital expenditures and investments 0 0
Proceeds from asset dispositions 0 0
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 0 (4)
Collection of advances/loans-related parties 0 0
Other 0 0
Net cash Provided by (used in) continuing investing activities 0 (4)
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Investing Activities 0 (4)
Cash Flows From Financing Activities    
Issuance of debt 0 0
Repayment of debt 0 0
Special cash distribution from Phillips 66 0  
Change in restricted cash 0  
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 0
Other 0 0
Net cash providec by (used in) continuing financing activities 0 0
Net cash provided by (used in) discontinued operations 0 0
Net Cash Providec by (Used in) Financing Activities 0 0
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 7 2
Cash and cash equivalents at beginning of period 37 29
Cash and Cash Equivalents at End of Period 44 31
ConocoPhillips Canada Funding Company II [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities 0 (6)
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Operating Activities 0 (6)
Cash Flows From Investing Activities    
Capital expenditures and investments 0 0
Proceeds from asset dispositions 0 0
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 0
Other 0 0
Net cash Provided by (used in) continuing investing activities 0 0
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Investing Activities 0 0
Cash Flows From Financing Activities    
Issuance of debt 0 4
Repayment of debt 0 0
Special cash distribution from Phillips 66 0  
Change in restricted cash 0  
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 0
Other 0 0
Net cash providec by (used in) continuing financing activities 0 4
Net cash provided by (used in) discontinued operations 0 0
Net Cash Providec by (Used in) Financing Activities 0 4
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 0 (2)
Cash and cash equivalents at beginning of period 1 4
Cash and Cash Equivalents at End of Period 1 2
All Other Subsidiaries [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities 4,423 7,113
Net cash provided by (used in) discontinued operations (191) 2,619
Net Cash Provided by (Used in) Operating Activities 4,232 9,732
Cash Flows From Investing Activities    
Capital expenditures and investments (10,147) (7,653)
Proceeds from asset dispositions 2,086 1,636
Net sales (purchases) of short-term investments 597 (1,623)
Long-term advances/loans-related parties (2,900) (4,562)
Collection of advances/loans-related parties 1,092 1,504
Other 173 32
Net cash Provided by (used in) continuing investing activities (9,099) (10,666)
Net cash provided by (used in) discontinued operations 8,028 (27)
Net Cash Provided by (Used in) Investing Activities (1,071) (10,693)
Cash Flows From Financing Activities    
Issuance of debt 55 19
Repayment of debt (177) (564)
Special cash distribution from Phillips 66 0  
Change in restricted cash 0  
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid (5,011) (2,573)
Other (1,540) (588)
Net cash providec by (used in) continuing financing activities (6,673) (3,706)
Net cash provided by (used in) discontinued operations 981 (291)
Net Cash Providec by (Used in) Financing Activities (5,692) (3,997)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 25 (84)
Net Change in Cash and Cash Equivalents (2,506) (5,042)
Cash and cash equivalents at beginning of period 3,713 8,703
Cash and Cash Equivalents at End of Period 1,207 3,661
Consolidating Adjustments [Member]
    
Cash Flows From Operating Activities    
Net cash provided by (used in) continuing operating activities (10,469) (3,277)
Net cash provided by (used in) discontinued operations 0 0
Net Cash Provided by (Used in) Operating Activities (10,469) (3,277)
Cash Flows From Investing Activities    
Capital expenditures and investments 4,685 (2)
Proceeds from asset dispositions (945) 0
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 2,955 4,665
Collection of advances/loans-related parties (1,125) (2,037)
Other 0 2
Net cash Provided by (used in) continuing investing activities 5,570 2,628
Net cash provided by (used in) discontinued operations (8,100) 0
Net Cash Provided by (Used in) Investing Activities (2,530) 2,628
Cash Flows From Financing Activities    
Issuance of debt (3,055) (4,581)
Repayment of debt 9,326 1,952
Special cash distribution from Phillips 66 0  
Change in restricted cash 0  
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 5,011 2,573
Other 931 0
Net cash providec by (used in) continuing financing activities 12,213 (56)
Net cash provided by (used in) discontinued operations 786 284
Net Cash Providec by (Used in) Financing Activities 12,999 228
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 0 (421)
Cash and cash equivalents at beginning of period 0 0
Cash and Cash Equivalents at End of Period $ 0 $ (421)
[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.