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Supplemental Information on Oil and Gas Operations (Unaudited) (Proved Developed and Undeveloped Reserves) (Details) MMBbls in Thousands, MMcf in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 MMBoe MMBbls MMcf | Dec. 31, 2021 MMBoe MMcf MMBbls | Dec. 31, 2020 MMBoe MMBbls MMcf | Dec. 31, 2019 MMBoe MMBbls MMcf
Reserve Quantities [Line Items] |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance | MMBoe |  | 1,625 | 752 | 757 |
Proved developed and undeveloped reserves, revisions due to prices | MMBoe |  | 34 | 155 | 78 |
Proved developed and undeveloped reserves, revisions other than price | MMBoe |  | 49 | 43 | 55 |
Proved developed and undeveloped reserves, extensions and discoveries | MMBoe |  | 278 | 228 | 135 |
Proved developed and undeveloped reserves, Purchase of reserves | MMBoe |  | 153 | 663 | 7 |
Proved developed and undeveloped reserves, production | MMBoe |  | (223) | (209) | (122) |
Proved developed and undeveloped reserves, sale of reserves | MMBoe |  | (3) | (7) | (2) |
Proved developed and undeveloped reserves, ending balance | MMBoe |  | 1,815 | 1,625 | 752 |
Proved developed reserves | MMBoe |  | 1,419 | 1,285 | 574 | 589
Proved developed producing reserves | MMBoe |  | 1,397 | 1,260 | 564 | 578
Proved undeveloped reserves | MMBoe |  | 396 | 340 | 178 | 168
Conversion rate of gas reserves from barrels of oil to Boe |  | 6 |  |  |
Oil [Member] |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance |  | 709 | 282 | 276 |
Proved developed and undeveloped reserves, revisions due to prices |  | 15 | 55 | (26) |
Proved developed and undeveloped reserves, revisions other than price |  | (55) | (23) | 18 |
Proved developed and undeveloped reserves, extensions and discoveries |  | 127 | 112 | 71 |
Proved developed and undeveloped reserves, Purchase of reserves |  | 106 | 393 | 1 |
Proved developed and undeveloped reserves, production |  | (109) | (106) | (57) |
Proved developed and undeveloped reserves, sale of reserves |  | 0 | (4) | (1) |
Proved developed and undeveloped reserves, ending balance |  | 793 | 709 | 282 |
Proved developed reserves |  | 596 | 544 | 194 | 198
Proved developed producing reserves |  | 585 | 533 | 190 | 191
Proved undeveloped reserves |  | 197 | 165 | 88 | 78
Natural Gas [Member] |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance | MMcf | [1] | 2,878 | 1,512 | 1,621 |
Proved developed and undeveloped reserves, revisions due to prices | MMcf | [1] | 61 | 382 | (209) |
Proved developed and undeveloped reserves, revisions other than price | MMcf | [1] | 13 | 11 | 119 |
Proved developed and undeveloped reserves, extensions and discoveries | MMcf | [1] | 449 | 348 | 188 |
Proved developed and undeveloped reserves, Purchase of reserves | MMcf | [1] | 137 | 961 | 19 |
Proved developed and undeveloped reserves, production | MMcf | [1] | (356) | (325) | (221) |
Proved developed and undeveloped reserves, sale of reserves | MMcf | [1] | (7) | (11) | (5) |
Proved developed and undeveloped reserves, ending balance | MMcf | [1] | 3,175 | 2,878 | 1,512 |
Proved developed reserves | MMcf | [1] | 2,595 | 2,361 | 1,244 | 1,344
Proved developed producing reserves | MMcf | [1] | 2,553 | 2,316 | 1,223 | 1,327
Proved undeveloped reserves | MMcf | [1] | 580 | 517 | 268 | 277
Natural Gas Liquids [Member] |  |  |  |  |
Reserve Quantities [Line Items] |  |  |  |  |
Proved developed and undeveloped reserves, beginning balance |  | 437 | 218 | 211 |
Proved developed and undeveloped reserves, revisions due to prices |  | 8 | 36 | (17) |
Proved developed and undeveloped reserves, revisions other than price |  | 3 | 64 | 17 |
Proved developed and undeveloped reserves, extensions and discoveries |  | 76 | 58 | 33 |
Proved developed and undeveloped reserves, Purchase of reserves |  | 24 | 110 | 3 |
Proved developed and undeveloped reserves, production |  | (54) | (48) | (28) |
Proved developed and undeveloped reserves, sale of reserves |  | (1) | (1) | (1) |
Proved developed and undeveloped reserves, ending balance |  | 493 | 437 | 218 |
Proved developed reserves |  | 391 | 348 | 173 | 167
Proved developed producing reserves |  | 387 | 341 | 171 | 165
Proved undeveloped reserves |  | 102 | 89 | 45 | 44
[1] | Gas reserves are converted to Boe at the rate of six Mcf per Bbl of oil, based upon the approximate relative energy content of gas and oil. NGL reserves are converted to Boe on a one-to-one basis with oil. The conversion rates are not necessarily indicative of the relationship of oil, natural gas and NGL prices.

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- Definition Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e61831-109447 + Details
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- Definition The net quantity of proved reserves as of the balance sheet date. Proved oil reserves are the estimated quantities of crude oil and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126939881&loc=d3e61797-109447 + Details
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