Segment Disclosures - Sales by Product (Details) - USD ($) |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Segment Reporting Information [Line Items] | |||||
| Sales and Other Operating Revenue | [1] | $ 32,567,000,000 | $ 36,417,000,000 | $ 29,106,000,000 | |
| Natural Gas [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales and Other Operating Revenue | 8,715,000,000 | 10,720,000,000 | 10,773,000,000 | ||
| Natural Gas Liquids [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales and Other Operating Revenue | 814,000,000 | 1,114,000,000 | 1,102,000,000 | ||
| Crude Oil [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales and Other Operating Revenue | 18,482,000,000 | 19,571,000,000 | 13,260,000,000 | ||
| Other Products [Member] | |||||
| Segment Reporting Information [Line Items] | |||||
| Sales and Other Operating Revenue | $ 4,556,000,000 | $ 5,012,000,000 | $ 3,971,000,000 | ||
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