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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2017
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, 2017 and December 31, 2016 (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, 2017
 

 
 

 
 

 
 

Financial Assets:
 

 
 

 
 

 
 

Natural Gas Swaps
$
—

 
$
1

 
$
—

 
$
1

Natural Gas Options/Collars
—

 
7

 
—

 
7

 
 
 
 
 
 
 
 
At December 31, 2016
 
 
 
 
 
 
 
Financial Assets:
 
 
 
 
 
 
 
Natural Gas Options/Collars
$
—

 
$
1

 
$
—

 
$
1

Financial Liabilities:
 
 
 
 
 
 
 
Crude Oil Swaps
$
—

 
$
36

 
$
—

 
$
36

Natural Gas Swaps
—

 
4

 
—

 
4

Natural Gas Options/Collars
—

 
22

 
—

 
22