2.2.0.7 false Joint Venture Acquisition Obligation 0210 - Disclosure - Joint Venture Acquisition Obligation true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Joint Venture Acquisition Obligation [Abstract] 0 cop_JointVentureAcquisitionObligationAbstract cop false na duration Joint Venture Acquisition Obligation. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string Joint Venture Acquisition Obligation. false 3 Joint Venture Acquisition Obligation 1 cop_JointVentureAcquisitionObligationTextBlock cop false na duration Long-term funding commitments to joint ventures or other affiliates. false false false false false false false false false false false verboselabel false 1 false false false false 0 0   <div style="font-family: 'Times New Roman',Times,serif"> <div align="left" style="font-size: 10.5pt; margin-top: 21pt"><b>Note 10—Joint Venture Acquisition Obligation</b> </div> <div align="left" style="font-size: 10.5pt; margin-top: 10.5pt">We are obligated to contribute $7.5 billion, plus interest, over a 10-year period that began in 2007, to FCCL Partnership. Quarterly principal and interest payments of $237 million began in the second quarter of 2007 and will continue until the balance is paid. Of the principal obligation amount, $686 million was short-term and was included in the “Accounts payable—related parties” line on our September 30, 2010, consolidated balance sheet. The principal portion of these payments, which totaled $491 million in the first nine months of 2010, is included in the “Other” line in the financing activities section of our consolidated statement of cash flows. Interest accrues at a fixed annual rate of 5.3 percent on the unpaid principal balance. Fifty percent of the quarterly interest payment is reflected as a capital contribution and is included in the “Capital expenditures and investments” line on our consolidated statement of cash flows. </div>   </div>  <div style="font-family: 'Times New Roman',Times,serif"> </div>  <!-- Begin Block Tagged Note false false false us-types:textBlockItemType textblock Long-term funding commitments to joint ventures or other affiliates. No authoritative reference available. false 1 2 false UnKnown UnKnown UnKnown false true