Risk Management Activities (Tables)

9 Months Ended

Sep. 30, 2017

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table sets forth the amounts and classification of EOG's outstanding financial derivative instruments at September 30, 2017 and December 31, 2016.  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 millions):

		Fair Value at
Description	Location on Balance Sheet	September 30, 2017		December 31, 2016
Asset Derivatives
Crude oil and natural gas derivative contracts -
Current portion	Assets from Price Risk Management Activities	$	3	$	—
Noncurrent portion	Other Assets	1		1
Liability Derivatives
Crude oil and natural gas derivative contracts -
Current portion	Liabilities from Price Risk Management Activities	$	3	$	62
Noncurrent portion	Other Liabilities	2		—

Crude Oil [Member] | Basis Swaps [Member]

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's crude oil basis swap contracts for the nine months ended September 30, 2017. 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.

Crude Oil Basis Swap Contracts
	Volume (Bbld)	Weighted Average Price Differential ($/Bbl)
2018
January 1, 2018 through December 31, 2018	15,000	$	1.063
2019
January 1, 2019 through December 31, 2019	20,000	$	1.075

Crude Oil [Member] | Price Swaps [Member]

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 nine months ended September 30, 2017, with notional volumes expressed in Bbld and prices expressed in $/Bbl.

Crude Oil Price Swap Contracts
	Volume (Bbld)	Weighted Average Price ($/Bbl)
2017
January 1, 2017 through February 28, 2017 (closed)	35,000	$	50.04
March 1, 2017 through June 30, 2017 (closed)	30,000	50.05

Natural Gas [Member] | Price Swaps [Member]

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 nine months ended September 30, 2017, 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)
2017
March 1, 2017 through October 31, 2017 (closed)	30,000	$	3.10
November 2017	30,000	3.10
2018
March 1, 2018 through November 30, 2018	35,000	$	3.00

Natural Gas [Member] | Options [Member]

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's natural gas call and put option contracts for the nine months ended September 30, 2017, with notional volumes expressed in MMBtud and prices expressed in $/MMBtu.

Natural Gas Option Contracts
	Call Options Sold			Put Options Purchased
	Volume (MMBtud)	Weighted Average Price ($/MMBtu)		Volume (MMBtud)	Weighted Average Price ($/MMBtu)
2017
March 1, 2017 through October 31, 2017 (closed)	213,750	$	3.44	171,000	$	2.92
November 2017	213,750	3.44		171,000	2.92
2018
March 1, 2018 through November 30, 2018	120,000	$	3.38	96,000	$	2.94

Natural Gas [Member] | Collars [Member]

Derivatives, Fair Value [Line Items]

Schedule of Derivative Instruments

Presented below is a comprehensive summary of EOG's natural gas collar contracts for the nine months ended September 30, 2017, with notional volumes expressed in MMBtud and prices expressed in $/MMBtu.

Natural Gas Collar Contracts
		Weighted Average Price ($/MMBtu)
	Volume (MMBtud)	Ceiling Price		Floor Price
2017
March 1, 2017 through October 31, 2017 (closed)	80,000	$	3.69	$	3.20
November 2017	80,000	3.69		3.20