Risk Management Activities (Details) (USD $)																							6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Crude Oil and Natural Gas Derivative Contracts [Member] Assets From Price Risk Management Activities [Member]		Dec. 31, 2013 Crude Oil and Natural Gas Derivative Contracts [Member] Assets From Price Risk Management Activities [Member]		Jun. 30, 2014 Crude Oil and Natural Gas Derivative Contracts [Member] Liabilities From Price Risk Management Activities [Member]		Dec. 31, 2013 Crude Oil and Natural Gas Derivative Contracts [Member] Liabilities From Price Risk Management Activities [Member]		Jun. 30, 2014 Crude Oil and Natural Gas Derivative Contracts [Member] Other Assets [Member]		Dec. 31, 2013 Crude Oil and Natural Gas Derivative Contracts [Member] Other Assets [Member]		Jun. 30, 2014 Crude Oil and Natural Gas Derivative Contracts [Member] Other Liabilities [Member]		Dec. 31, 2013 Crude Oil and Natural Gas Derivative Contracts [Member] Other Liabilities [Member]		Jun. 30, 2014 Foreign Currency Swap [Member] Other Current Liabilities [Member]	Dec. 31, 2013 Foreign Currency Swap [Member] Other Current Liabilities [Member]	Jun. 30, 2014 Interest Rate Swap [Member] Other Current Liabilities [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Other Current Liabilities [Member]	Jun. 30, 2014 Crude Oil Derivative Contracts January (closed) [Member] bbl	Jun. 30, 2014 Crude Oil Derivative Contracts February (closed) [Member] bbl	Jun. 30, 2014 Crude Oil Derivative Contracts March - June (closed) [Member] bbl	Jun. 30, 2014 Crude Oil Derivative Contracts July - August [Member] bbl	Jun. 30, 2014 Crude Oil Derivative Contracts September - December [Member] bbl	Jun. 30, 2014 Crude Oil Derivative Contracts Year Two [Member] bbl		Jun. 30, 2014 Crude Oil Derivative Contracts Year Two January - June [Member] bbl		Jun. 30, 2014 Natural Gas Derivative Contracts January (closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Contracts February (closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Contracts March (closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Contracts April (closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Contracts May (closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Contracts June (Closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Gas Contracts July (closed) [Member] MMBTU	Jun. 30, 2014 Natural Gas Derivative Contracts August - December [Member] MMBTU		Jun. 30, 2014 Natural Gas Derivative Contracts Year Two January - December [Member] MMBTU
Derivative [Line Items]
Volumes (MMBtud) - Swaption Contracts																																							480,000	[1]	175,000	[2]
Volume (Bbld)																							156,000	171,000	181,000	202,000	192,000	0	[3]
Derivative Weighted Average Price Crude Oil ($/Bbl)																							96.30	96.35	96.55	96.34	96.15	0.00	[3]
Volumes (Bbld) - Derivative Option Contracts																														69,000	[3]
Average Price ($/Bbl) - Derivative Option Contracts																														95.20	[3]
Volume (MMBtud)																																230,000	710,000	810,000	465,000	685,000	515,000	340,000	330,000	[1]	175,000	[2]
Derivative Weighted Average Price Natural Gas ($/MMBtu)																																4.51	4.57	4.60	4.52	4.55	4.52	4.55	4.55	[1]	4.51	[2]
Average Price ($/MMBtu) - Derivative Option Contracts																																							4.63	[1]	4.51	[2]
Derivatives, Fair Value [Line Items]
Derivative Assets, Current	$ 0	$ 8,260,000	$ 0	[4]	$ 8,000	[4]
Other Assets											5,000	[5]	0	[5]
Derivative Liabilities, Current	338,318,000	127,542,000					338,000	[6]	127,000	[6]									0	40,000	0	1,000
Other Liabilities															0	[7]	0	[7]
Derivative Assets, Current, Gross			14,000,000		18,000,000		14,000,000		10,000,000
Derivative Assets, Noncurrent, Gross											11,000,000				6,000,000
Derivative Liabilities, Current, Gross			14,000,000		10,000,000		352,000,000		137,000,000
Derivative Liabilities, Noncurrent, Gross											6,000,000				6,000,000
Derivative Collateral [Abstract]
Collateral Held on Derivative	0	0
Collateral Had on Derivaitve	$ 79,000,000	$ 0

[1] (1)EOG has entered into natural gas derivative contracts which give counterparties the option of entering into derivative contracts at future dates. All such options are exercisable monthly up until the settlement date of each monthly contract. If the counterparties exercise all such options, the notional volume of EOG's existing natural gas derivative contracts will increase by 480,000 MMBtud at an average price of $4.63 per MMBtu for each month during the period August 1, 2014 through December 31, 2014.

[2] (2)EOG has entered into natural gas derivative contracts which give counterparties the option of entering into derivative contracts at future dates. All such options are exercisable monthly up until the settlement date of each monthly contract. If the counterparties exercise all such options, the notional volume of EOG's existing natural gas derivative contracts will increase by 175,000 MMBtud at an average price of $4.51 per MMBtu for each month during the period January 1, 2015 through December 31, 2015.

[3] (1)EOG has entered into crude oil derivative contracts which give counterparties the option to extend certain current derivative contracts for additional six-month periods. Options covering a notional volume of 69,000 Bbld are exercisable on or about December 31, 2014. If the counterparties exercise all such options, the notional volume of EOG's existing crude oil derivative contracts will increase by 69,000 Bbld at an average price of $95.20 per barrel for each month during the period January 1, 2015 through June 30, 2015.

[4] (1)The current portion of Assets from Price Risk Management Activities consists of gross assets of $14 million, offset by gross liabilities of $14 million at June 30, 2014, and gross assets of $18 million, partially offset by gross liabilities of $10 million at December 31, 2013.

[5] (2)The noncurrent portion of Assets from Price Risk Management Activities consists of gross assets of $11 million, partially offset by gross liabilities of $6 million at June 30, 2014.

[6] (3)The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $352 million, partially offset by gross assets of $14 million at June 30, 2014, and gross liabilities of $137 million, partially offset by gross assets of $10 million at December 31, 2013.

[7] (4)The noncurrent portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $6 million, offset by gross assets of $6 million at June 30, 2014.