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Oil and Gas Exploration and Production Industries Disclosures, Costs Incurred (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] |  |  |  |  |  |  |
Acquisition Costs of Properties - Unproved |  | $ 276,092 | [1] | $ 487,339 | [2] | $ 426,540 | [3]
Acquisition Costs of Properties - Proved |  | 379,938 | [4] | 123,684 | [5] | 72,584 | [6]
Subtotal |  | 656,030 |  | 611,023 |  | 499,124 |
Exploration Costs |  | 273,339 |  | 193,628 |  | 223,599 |
Development Costs |  | 5,698,856 | [7] | 5,615,029 | [8] | 3,716,687 | [9]
Total |  | 6,628,225 |  | 6,419,680 |  | 4,439,410 |
Non-Cash Unproved Leasehold Acquisition Costs Related to Property Exchanges |  | 98,000 |  | 291,000 |  | 256,000 |
Non-Cash Proved Property Acquisition Costs Related to Property Exchanges |  | 52,000 |  | 71,000 |  | 26,000 |
United States |  |  |  |  |  |  |
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] |  |  |  |  |  |  |
Acquisition Costs of Properties - Unproved |  | 276,092 | [1] | 486,081 | [2] | 424,118 | [3]
Acquisition Costs of Properties - Proved |  | 379,938 | [4] | 123,684 | [5] | 72,584 | [6]
Subtotal |  | 656,030 |  | 609,765 |  | 496,702 |
Exploration Costs |  | 213,505 |  | 157,222 |  | 144,499 |
Development Costs |  | 5,661,753 | [7] | 5,605,264 | [8] | 3,590,899 | [9]
Total |  | 6,531,288 |  | 6,372,251 |  | 4,232,100 |
Asset Retirement Costs Included In Development |  | 181,000 |  | 90,000 |  | 50,000 |
Trinidad |  |  |  |  |  |  |
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] |  |  |  |  |  |  |
Acquisition Costs of Properties - Unproved |  | 0 | [1] | 1,258 | [2] | 2,422 | [3]
Acquisition Costs of Properties - Proved |  | 0 | [4] | 0 | [5] | 0 | [6]
Subtotal |  | 0 |  | 1,258 |  | 2,422 |
Exploration Costs |  | 46,616 |  | 22,511 |  | 62,547 |
Development Costs |  | 25,007 | [7] | (12,863) | [8] | 109,491 | [9]
Total |  | 71,623 |  | 10,906 |  | 174,460 |
Asset Retirement Costs Included In Development |  | 1,000 |  | (12,000) |  | 2,000 |
Other International |  |  |  |  |  |  |
Costs Incurred, Oil and Gas Property Acquisition, Exploration, and Development Activities [Line Items] |  |  |  |  |  |  |
Acquisition Costs of Properties - Unproved | [10] | 0 | [1] | 0 | [2] | 0 | [3]
Acquisition Costs of Properties - Proved | [10] | 0 | [4] | 0 | [5] | 0 | [6]
Subtotal | [10] | 0 |  | 0 |  | 0 |
Exploration Costs | [10] | 13,218 |  | 13,895 |  | 16,553 |
Development Costs | [10] | 12,096 | [7] | 22,628 | [8] | 16,297 | [9]
Total | [10] | 25,314 |  | 36,523 |  | 32,850 |
Asset Retirement Costs Included In Development |  | $ 4,000 |  | $ (8,000) |  | $ 4,000 |
[1] | Includes non-cash unproved leasehold acquisition costs of $98 million related to property exchanges.
[2] | Includes non-cash unproved leasehold acquisition costs of $291 million related to property exchanges.
[3] | Includes non-cash unproved leasehold acquisition costs of $256 million related to property exchanges.
[4] | Includes non-cash proved property acquisition costs of $52 million related to property exchanges.
[5] | Includes non-cash proved property acquisition costs of $71 million related to property exchanges.
[6] | Includes non-cash proved property acquisition costs of $26 million related to property exchanges.
[7] | Includes Asset Retirement Costs of $181 million, $1 million and $4 million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.
[8] | Includes Asset Retirement Costs of $90 million, $(12) million and $(8) million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.
[9] | Includes Asset Retirement Costs of $50 million, $2 million and $4 million for the United States, Trinidad and Other International, respectively. Excludes other property, plant and equipment.
[10] | Other International primarily consists of EOG's United Kingdom, China and Canada operations. The United Kingdom operations were sold in the fourth quarter of 2018.

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