Long-Term Debt	3 Months Ended
Mar. 31, 2017
Debt Disclosure [Abstract]
Long-Term Debt [Text Block]	Long-Term Debt EOG had no outstanding commercial paper borrowings or uncommitted credit facility borrowings at March 31, 2017, and did not utilize any such borrowings during the three months ended March 31, 2017. During the three months ended March 31, 2016, EOG utilized commercial paper, bearing market interest rates, for various corporate financing purposes. The average borrowings outstanding under the commercial paper program were $118 million during the three months ended March 31, 2016. The weighted average interest rate for commercial paper borrowings was 0.75% during the three months ended March 31, 2016. At March 31, 2017, $600 million aggregate principal amount of EOG's 5.875% Senior Notes due 2017 were classified as long-term debt based upon its intent and ability to ultimately replace such amount with other long-term debt. EOG currently has a $2.0 billion senior unsecured Revolving Credit Agreement (Agreement) with domestic and foreign lenders. The Agreement has a scheduled maturity date of July 21, 2020, and includes an option for EOG to extend, on up to two occasions, the term for successive one-year periods subject to certain terms and conditions. Advances under the Agreement will accrue interest based, at EOG's option, on either the London InterBank Offered Rate plus an applicable margin (Eurodollar rate) or the base rate (as defined in the Agreement) plus an applicable margin. At March 31, 2017, there were no borrowings or letters of credit outstanding under the Agreement. The Eurodollar rate and applicable base rate, had there been any amounts borrowed under the Agreement, would have been 1.98% and 4.00%, respectively.

Long-Term Debt

EOG had no outstanding commercial paper borrowings or uncommitted credit facility borrowings at March 31, 2017, and did not utilize any such borrowings during the three months ended March 31, 2017. During the three months ended March 31, 2016, EOG utilized commercial paper, bearing market interest rates, for various corporate financing purposes. The average borrowings outstanding under the commercial paper program were $118 million during the three months ended March 31, 2016. The weighted average interest rate for commercial paper borrowings was 0.75% during the three months ended March 31, 2016.

At March 31, 2017, $600 million aggregate principal amount of EOG's 5.875% Senior Notes due 2017 were classified as long-term debt based upon its intent and ability to ultimately replace such amount with other long-term debt.

EOG currently has a $2.0 billion senior unsecured Revolving Credit Agreement (Agreement) with domestic and foreign lenders. The Agreement has a scheduled maturity date of July 21, 2020, and includes an option for EOG to extend, on up to two occasions, the term for successive one-year periods subject to certain terms and conditions. Advances under the Agreement will accrue interest based, at EOG's option, on either the London InterBank Offered Rate plus an applicable margin (Eurodollar rate) or the base rate (as defined in the Agreement) plus an applicable margin. At March 31, 2017, there were no borrowings or letters of credit outstanding under the Agreement. The Eurodollar rate and applicable base rate, had there been any amounts borrowed under the Agreement, would have been 1.98% and 4.00%, respectively.