Risk Management Activities (Details) (USD $)																							9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 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]		Sep. 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]		Sep. 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]		Sep. 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]		Sep. 30, 2014 Foreign Currency Swap [Member] Other Current Liabilities [Member]	Dec. 31, 2013 Foreign Currency Swap [Member] Other Current Liabilities [Member]	Sep. 30, 2014 Interest Rate Swap [Member] Other Current Liabilities [Member]	Dec. 31, 2013 Interest Rate Swap [Member] Other Current Liabilities [Member]	Sep. 30, 2014 Crude Oil Derivative Contracts January (closed) [Member] bbl	Sep. 30, 2014 Crude Oil Derivative Contracts February (closed) [Member] bbl	Sep. 30, 2014 Crude Oil Derivative Contracts March - June (closed) [Member] bbl	Sep. 30, 2014 Crude Oil Derivative Contracts July - August (closed) [Member] bbl	Sep. 30, 2014 Crude Oil Derivative Contracts September (closed) [Member] bbl	Sep. 30, 2014 Crude Oil Derivative Contracts October - December [Member] bbl	Sep. 30, 2014 Crude Oil Derivative Contracts Year Two January - June [Member] bbl		Sep. 30, 2014 Crude Oil Derivative Contracts Year Two July - December [Member] bbl		Sep. 30, 2014 Natural Gas Derivative Contracts January (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts February (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts March (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts April (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts May (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts June (Closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts July (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts August - October (closed) [Member] MMBTU	Sep. 30, 2014 Natural Gas Derivative Contracts November - December [Domain] MMBTU		Sep. 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	192,000	20,000	[3]	10,000	[3]
Derivative Weighted Average Price Crude Oil ($/Bbl)																							96.30	96.35	96.55	96.34	96.15	96.15	91.41	[3]	89.98	[3]
Volumes (Bbld) - Derivative Option Contracts																													69,000	[3]	10,000	[3]
Average Price ($/Bbl) - Derivative Option Contracts																													95.20	[3]	92.85	[3]
Volume (MMBtud)																																	230,000	710,000	810,000	465,000	685,000	515,000	340,000	330,000	330,000	[1]	175,000	[2]
Derivative Weighted Average Price Natural Gas ($/MMBtu)																																	4.51	4.57	4.60	4.52	4.55	4.52	4.55	4.55	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	$ 132,931,000	$ 8,260,000	$ 133,000,000	[4]	$ 8,000,000	[4]
Other Assets											6,000,000	[5]	0	[5]
Derivative Liabilities, Current	0	127,542,000					0	[6]	127,000,000	[6]									0	40,000,000	0	1,000,000
Other Liabilities															0	[7]	0	[7]
Derivative Assets, Current, Gross			147,000,000		18,000,000		14,000,000		10,000,000
Derivative Assets, Noncurrent, Gross											10,000,000				4,000,000
Derivative Liabilities, Current, Gross			14,000,000		10,000,000		14,000,000		137,000,000
Derivative Liabilities, Noncurrent, Gross											4,000,000				4,000,000
Derivative Collateral [Abstract]
Collateral Held on Derivative	10,000,000	0
Collateral Had on Derivaitve	$ 0	$ 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 November 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. Options covering a notional volume of 10,000 Bbld are exercisable on June 30, 2015. If the counterparties exercise all such options, the notional volume of EOG's existing crude oil derivative contracts will increase by 10,000 Bbld at an average price of $92.85 per barrel for each month during the period July 1, 2015 through December 31, 2015.

[4] (1)The current portion of Assets from Price Risk Management Activities consists of gross assets of $147 million, partially offset by gross liabilities of $14 million at September 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 $10 million, partially offset by gross liabilities of $4 million at September 30, 2014.

[6] (3)The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $14 million, offset by gross assets of $14 million at September 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 $4 million, offset by gross assets of $4 million at September 30, 2014.