Long-Term Debt	9 Months Ended
Sep. 30, 2012
Long-Term Debt [Abstract]
Long-term Debt [Text Block]	10. Long-Term Debt Long-Term Debt. During the nine months ended September 30, 2012, EOG utilized commercial paper and short-term borrowings from uncommitted credit facilities, bearing market interest rates, for various corporate financing purposes. EOG had no outstanding borrowings from commercial paper issuances or uncommitted credit facilities at September 30, 2012. The average of the borrowings outstanding under the commercial paper program and uncommitted credit facilities was $315 million and $55 thousand, respectively, during the nine months ended September 30, 2012. The weighted average interest rates for commercial paper and uncommitted credit facility borrowings for the nine months ended September 30, 2012 were 0.45% and 0.70%, respectively. On September 10, 2012, EOG closed its sale of $1.25 billion aggregate principal amount of its 2.625% Senior Notes due 2023 (Notes). Interest on the Notes is payable semi-annually in arrears on March 15 and September 15 of each year, beginning March 15, 2013. Net proceeds from the Notes offering of approximately $1,234 million were used for general corporate purposes, including repayment of outstanding commercial paper borrowings and funding of capital expenditures. EOG currently has a $2.0 billion unsecured Revolving Credit Agreement (Agreement) with domestic and foreign lenders. The Agreement matures on October 11, 2016 and includes an option for EOG to extend, on up to two occasions, the term for successive one-year periods, subject to, among certain other terms and conditions, the consent of the banks holding greater than 50% of the commitments then outstanding under the Agreement. At September 30, 2012, there were no borrowings or letters of credit outstanding under the Agreement. Advances under the Agreement accrue interest based, at EOG's option, on either the London InterBank Offered Rate (LIBOR) plus an applicable margin (Eurodollar rate), or the base rate (as defined in the Agreement) plus an applicable margin. At September 30, 2012, the Eurodollar rate and applicable base rate, had there been any amounts borrowed under the Agreement, would have been 1.09% and 3.25%, respectively. Capital Lease. During the third quarter of 2012, EOG began leasing certain newly constructed crude oil storage tanks located in the Eagle Ford Shale. The lease has an initial term of 10 years and EOG has an option to extend the lease for an additional 5-year period. It was determined that the lease qualifies as a capital lease for accounting purposes and, as a result, EOG has recognized a capital lease asset and a related liability of $66 million. The capital lease asset is included in Other Property, Plant and Equipment on the Consolidated Balance Sheets. The related liability is included in Long-Term Debt ($59 million) and Current Liabilities – Other ($7 million) on the Consolidated Balance Sheets. Total aggregate minimum lease payments are approximately $76 million over the initial term of the lease.

10. Long-Term Debt

Long-Term Debt. During the nine months ended September 30, 2012, EOG utilized commercial paper and short-term borrowings from uncommitted credit facilities, bearing market interest rates, for various corporate financing purposes. EOG had no outstanding borrowings from commercial paper issuances or uncommitted credit facilities at September 30, 2012. The average of the borrowings outstanding under the commercial paper program and uncommitted credit facilities was $315 million and $55 thousand, respectively, during the nine months ended September 30, 2012. The weighted average interest rates for commercial paper and uncommitted credit facility borrowings for the nine months ended September 30, 2012 were 0.45% and 0.70%, respectively.

On September 10, 2012, EOG closed its sale of $1.25 billion aggregate principal amount of its 2.625% Senior Notes due 2023 (Notes). Interest on the Notes is payable semi-annually in arrears on March 15 and September 15 of each year, beginning March 15, 2013. Net proceeds from the Notes offering of approximately $1,234 million were used for general corporate purposes, including repayment of outstanding commercial paper borrowings and funding of capital expenditures.

EOG currently has a $2.0 billion unsecured Revolving Credit Agreement (Agreement) with domestic and foreign lenders. The Agreement matures on October 11, 2016 and includes an option for EOG to extend, on up to two occasions, the term for successive one-year periods, subject to, among certain other terms and conditions, the consent of the banks holding greater than 50% of the commitments then outstanding under the Agreement. At September 30, 2012, there were no borrowings or letters of credit outstanding under the Agreement. Advances under the Agreement accrue interest based, at EOG's option, on either the London InterBank Offered Rate (LIBOR) plus an applicable margin (Eurodollar rate), or the base rate (as defined in the Agreement) plus an applicable margin. At September 30, 2012, the Eurodollar rate and applicable base rate, had there been any amounts borrowed under the Agreement, would have been 1.09% and 3.25%, respectively.

Capital Lease. During the third quarter of 2012, EOG began leasing certain newly constructed crude oil storage tanks located in the Eagle Ford Shale. The lease has an initial term of 10 years and EOG has an option to extend the lease for an additional 5-year period. It was determined that the lease qualifies as a capital lease for accounting purposes and, as a result, EOG has recognized a capital lease asset and a related liability of $66 million. The capital lease asset is included in Other Property, Plant and Equipment on the Consolidated Balance Sheets. The related liability is included in Long-Term Debt ($59 million) and Current Liabilities – Other ($7 million) on the Consolidated Balance Sheets. Total aggregate minimum lease payments are approximately $76 million over the initial term of the lease.