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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2020
Accounting Policies [Abstract] |
Schedule of Revenue from Contracts with Customers Disaggregated Based on Type of Good | The following table presents revenue from contracts with customers that are disaggregated based on the type of good.
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Oil |  | $ | 2,034 |  |  | $ | 2,988 |  |  | $ | 2,941 |
Gas |  |  | 326 |  |  |  | 391 |  |  |  | 482 |
NGL |  |  | 335 |  |  |  | 430 |  |  |  | 662 |
Oil, gas and NGL sales |  |  | 2,695 |  |  |  | 3,809 |  |  |  | 4,085 |
Oil |  |  | 936 |  |  |  | 1,534 |  |  |  | 2,745 |
Gas |  |  | 488 |  |  |  | 645 |  |  |  | 738 |
NGL |  |  | 554 |  |  |  | 686 |  |  |  | 871 |
Marketing and midstream revenues |  |  | 1,978 |  |  |  | 2,865 |  |  |  | 4,354 |
Total revenues from contracts with customers |  | $ | 4,673 |  |  | $ | 6,674 |  |  | $ | 8,439 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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