Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements [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 December 31, 2012 and 2011 (in millions):

			Fair Value Measurements Using:
			Quoted		Significant
			Prices in		Other		Significant
			Active		Observable		Unobservable
			Markets		Inputs		Inputs
			(Level 1)		(Level 2)		(Level 3)		Total
At December 31, 2012
Financial Assets:
	Crude Oil Swaps	$	-	$	65	$	-	$	65
	Crude Oil Options/Swaptions		-		36		-		36
	Natural Gas Options/Swaptions		-		65		-		65
Financial Liabilities:
	Crude Oil Options/Swaptions	$	-	$	8	$	-	$	8
	Natural Gas Options/Swaptions		-		13		-		13
	Foreign Currency Rate Swap		-		55		-		55
	Interest Rate Swap		-		4		-		4
At December 31, 2011
Financial Assets:
	Crude Oil Swaps	$	-	$	29	$	-	$	29
	Crude Oil Options/Swaptions		-		4		-		4
	Natural Gas Swaps		-		81		-		81
	Natural Gas Options/Swaptions		-		372		-		372
Financial Liabilities:
	Foreign Currency Rate Swap	$	-	$	52	$	-	$	52
	Interest Rate Swap		-		3		-		3