Pension and Postretirement Benefits	9 Months Ended
	Sep. 30, 2020
Retirement Benefits [Abstract]
Pension and Postretirement Benefits	Pension and Postretirement BenefitsEOG has defined contribution pension plans in place for most of its employees in the United States, and a defined benefit pension plan covering certain of its employees in Trinidad. For the nine months ended September 30, 2020 and 2019, EOG's total costs recognized for these pension plans were $30.9 million and $34.0 million, respectively. EOG also has postretirement medical and dental plans in place for eligible employees and their dependents in the United States and Trinidad, the costs of which are not material.