Risk Management Activities (Tables)

3 Months Ended

Mar. 31, 2019

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table sets forth the amounts and classification of EOG's outstanding financial derivative instruments at March 31, 2019 and December 31, 2018.  Certain amounts may be presented on a net basis on the Condensed Consolidated Financial Statements when such amounts are with the same counterparty and subject to a master netting arrangement (in thousands):

		Fair Value at
Description	Location on Balance Sheet	March 31, 2019		December 31, 2018
Asset Derivatives
Crude oil and natural gas derivative contracts -
Current portion	Assets from Price Risk Management Activities (1)	$	3,909	$	23,806
Liability Derivatives
Crude oil and natural gas derivative contracts -
Current portion	Liabilities from Price Risk Management Activities (2)	$	746	$	—

(1) The current portion of Assets from Price Risk Management Activities consists of gross assets of $7 million, partially offset by gross liabilities of $3 million at March 31, 2019.

(2) The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $2 million, partially offset by gross assets of $1 million at March 31, 2019.

Crude Oil | Midland Differential Basis Swaps

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's Midland Differential basis swap contracts for the three months ended March 31, 2019. The weighted average price differential expressed in dollars per barrel ($/Bbl) represents the amount of reduction to Cushing, Oklahoma, prices for the notional volumes expressed in barrels per day (Bbld) covered by the basis swap contracts.

Midland Differential Basis Swap Contracts
	Volume (Bbld)	Weighted Average Price Differential ($/Bbl)
2019
January 1, 2019 through April 30, 2019 (closed)	20,000	$	1.075
May 1, 2019 through December 31, 2019	20,000	1.075

Crude Oil | Gulf Coast Differential Basis Swap

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's Gulf Coast Differential basis swap contracts for the three months ended March 31, 2019. The weighted average price differential expressed in $/Bbl represents the amount of addition to Cushing, Oklahoma, prices for the notional volumes expressed in Bbld covered by the basis swap contracts.

Gulf Coast Differential Basis Swap Contracts
	Volume (Bbld)	Weighted Average Price Differential ($/Bbl)
2019
January 1, 2019 through April 30, 2019 (closed)	13,000	$	5.572
May 1, 2019 through December 31, 2019	13,000	5.572

Crude Oil | Price Swaps

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's crude oil price swap contracts for the three months ended March 31, 2019, with notional volumes expressed in Bbld and prices expressed in $/Bbl.

Crude Oil Price Swap Contracts
	Volume (Bbld)	Weighted Average Price ($/Bbl)
2019
April 1, 2019 through December 31, 2019	25,000	$	60.00

Natural Gas | Price Swaps

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's natural gas price swap contracts for the three months ended March 31, 2019, with notional volumes expressed in million British thermal units (MMBtu) per day (MMBtud) and prices expressed in dollars per MMBtu ($/MMBtu).

Natural Gas Price Swap Contracts
	Volume (MMBtud)	Weighted Average Price ($/MMBtu)
2019
April 2019 (closed)	250,000	$	2.90
May 1, 2019 through October 31, 2019	250,000	2.90