Other Income, Net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Income and Expenses [Abstract]
Equity income from investments in Trinidad	$ 8	$ 11	$ 20
Interest income		6us-gaap_InterestIncomeOther	9us-gaap_InterestIncomeOther
Net foreign currency transaction gains/(losses)	(34)	12	7
Losses on sales of warehouse stock	15us-gaap_GainLossOnDispositionOfAssets1	23us-gaap_GainLossOnDispositionOfAssets1	10us-gaap_GainLossOnDispositionOfAssets1
Operating losses on EOG's investment in Pacific Trail Pipelines (PTP) in Canada			$ 9us-gaap_GainLossOnInvestments

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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