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Pension and Postretirement Benefits	9 Months Ended
Pension and Postretirement Benefits	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Pension and Postretirement Benefits [Text Block]	Pension and Postretirement Benefits EOG has defined contribution pension plans in place for most of its employees in the United States, Trinidad and the United Kingdom, and a defined benefit pension plan covering certain of its employees in Trinidad. For the nine months ended September 30, 2016 and 2015, EOG's total costs recognized for these pension plans were $28 million and $27 million, respectively. EOG also has postretirement medical and dental plans in place for eligible employees in the United States and Trinidad, the costs of which are not material.