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Exploratory Well Costs (Tables)
 12 Months Ended
Dec. 31, 2023
Capitalized Exploratory Well Costs [Abstract]  
Schedule of Net Changes in Capitalized Exploratory Well Costs
EOG's net changes in capitalized exploratory well costs for the years ended December 31, 2023, 2022 and 2021 are presented below (in millions):
 202320222021
Balance at January 1$15 $7 $29 
Additions Pending the Determination of Proved Reserves195 135 73 
Reclassifications to Proved Properties(133)(88)(41)
Costs Charged to Expense (1)
(1)(39)(54)
Balance at December 31$76 $15 $7 
(1)    Includes capitalized exploratory well costs charged to either dry hole costs or impairments.
Schedule of Aging of Capitalized Exploratory Well Costs
 202320222021
Capitalized exploratory well costs that have been capitalized for a period of one year or less$73 $15 $7 
Capitalized exploratory well costs that have been capitalized for a period greater than one year (1)
3 — — 
Balance at December 31$76 $15 $7 
Number of exploratory wells that have been capitalized for a period greater than one year2 — — 
(1)    Consists of costs related to two projects in the United States at December 31, 2023.