Risk Management Activities (Details)		6 Months Ended
		Jun. 30, 2015 USD ($) $ / bbl $ / MMBTU MMBTU bbl	Dec. 31, 2014 USD ($)
Derivatives, Fair Value [Line Items]
Derivative Assets, Current		$ 106,821,000	$ 465,128,000
Derivative Collateral [Abstract]
Collateral Held on Derivative		43,000,000	278,000,000
Collateral Had on Derivaitve		$ 0	0
Crude Oil Derivative Contracts January - March (closed) [Member]
Derivative [Line Items]
Volume (Bbld) | bbl		47,000
Derivative Weighted Average Price Crude Oil ($/Bbl) | $ / bbl		91.22
Crude Oil Derivative Contracts July - December [Member]
Derivative [Line Items]
Volume (Bbld) | bbl		10,000
Derivative Weighted Average Price Crude Oil ($/Bbl) | $ / bbl		89.98
Natural Gas Derivative Contracts January - February (closed) [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU		235,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU		4.47
Natural Gas Derivative Contracts March (closed) [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU		225,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU		4.48
Natural Gas Derivative Contracts April (closed) [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU		195,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU		4.49
Natural Gas Derivative Contracts May (closed) [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU		235,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU		4.13
Natural Gas Derivative Contracts June (closed) [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU		275,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU		3.97
Natural Gas Derivative Contracts July (closed) [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU		275,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU		3.98
Natural Gas Derivative Contracts August - December [Member]
Derivative [Line Items]
Volume (MMBtud) | MMBTU	[1]	175,000
Derivative Weighted Average Price Natural Gas ($/MMBtu) | $ / MMBTU	[1]	4.51
Natural Gas Derivative Contracts August - December [Domain]
Derivative [Line Items]
Volumes (MMBtud) - Options Contracts | MMBTU	[1]	175,000
Average Price ($/MMBtu) - Derivative Options Contracts | $ / MMBTU	[1]	4.51
Crude Oil and Natural Gas Derivative Contracts [Member] | Liabilities From Price Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liabilities, Current	[2]	$ 0	0
Derivative Assets, Current, Gross	[2]	1,000,000	12,000,000
Derivative Liabilities, Current, Gross	[2]	1,000,000	12,000,000
Crude Oil and Natural Gas Derivative Contracts [Member] | Assets From Price Risk Management Activities [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets, Current	[3]	107,000,000	465,000,000
Derivative Assets, Current, Gross	[3]	108,000,000	477,000,000
Derivative Liabilities, Current, Gross	[3]	$ 1,000,000	$ 12,000,000

[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 175,000 MMBtud at an average price of $4.51 per MMBtu for each month during the period August 1, 2015 through December 31, 2015.

[2] The current portion of Liabilities from Price Risk Management Activities consists of gross liabilities of $1 million, offset by gross assets of $1 million at June 30, 2015, and gross liabilities of $12 million, offset by gross assets of $12 million at December 31, 2014.

[3] The current portion of Assets from Price Risk Management Activities consists of gross assets of $108 million, partially offset by gross liabilities of $1 million at June 30, 2015, and gross assets of $477 million, partially offset by gross liabilities of $12 million at December 31, 2014.