Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Assets and Liabilities Measured On Recurring Basis

The following table provides fair value measurement information within the fair value hierarchy for certain of EOG's financial assets and liabilities carried at fair value on a recurring basis at March 31, 2018 and December 31, 2017 (in millions):

	Fair Value Measurements Using:
	Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
At March 31, 2018
Financial Assets:
Natural Gas Swaps	$	—	$	2	$	—	$	2
Natural Gas Options	—		4		—		4
Crude Oil Basis Swaps	—		35		—		35
Financial Liabilities:
Crude Oil Swaps	$	—	$	117	$	—	$	117
At December 31, 2017
Financial Assets:
Natural Gas Swaps	$	—	$	2	$	—	$	2
Natural Gas Options/Collars	—		6		—		6
Financial Liabilities:
Crude Oil Swaps	$	—	$	38	$	—	$	38
Crude Oil Basis Swaps	—		19		—		19