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Exploratory Well Costs (Tables) | 12 Months Ended
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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):
| 2023 |  | 2022 |  | 2021
Balance at January 1 | $ | 15 |  |  | $ | 7 |  |  | $ | 29 |
Additions Pending the Determination of Proved Reserves | 195 |  |  | 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 |
| 2023 |  | 2022 |  | 2021
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 year | 2 |  |  | — |  |  | — |
(1) Consists of costs related to two projects in the United States at December 31, 2023.

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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- Definition Tabular disclosure of the amount of exploratory well costs that have been capitalized after the completion of drilling and the number of projects for which those costs relate. Additionally, for exploratory well costs that have been capitalized for periods greater than one year at the most recent balance sheet date, this block of text may be used to disclose an aging of those amounts by year, or by using a range of years, and the number of projects to which those costs relate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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