Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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 June 30, 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 June 30, 2018
Financial Assets:
Natural Gas Swaps	$	—	$	—	$	—	$	—
Natural Gas Options	—		2		—		2
Crude Oil Basis Swaps	—		83		—		83
Financial Liabilities:
Crude Oil Swaps	$	—	$	261	$	—	$	261
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