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v3.20.4

Operating Segments and Geographic Data - Segment Sales and Operating Revenues (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | $ 94,471 | $ 139,865 | $ 158,902
Oil and Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 94,471 | 139,865 | 158,902
Oil and Gas | Upstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 26,311 | 31,707 | 33,069
Oil and Gas | Downstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 68,083 | 107,912 | 125,597
Oil and Gas | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 113,665 | 172,995 | 191,228
Oil and Gas | Operating Segments | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 47,910 | 79,693 | 83,289
Oil and Gas | Operating Segments | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 65,755 | 93,302 | 107,939
Oil and Gas | Operating Segments | Upstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 41,381 | 58,986 | 60,713
Oil and Gas | Operating Segments | Upstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 14,577 | 23,358 | 22,891
Oil and Gas | Operating Segments | Upstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 26,804 | 35,628 | 37,822
Oil and Gas | Operating Segments | Downstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 71,525 | 112,925 | 129,471
Oil and Gas | Operating Segments | Downstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 32,589 | 55,271 | 59,376
Oil and Gas | Operating Segments | Downstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 38,936 | 57,654 | 70,095
Oil and Gas | Intersegment | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (667) | (818) | (786)
Oil and Gas | Intersegment | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (15) | (20) | (22)
Oil and Gas | Intersegment | Upstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (8,068) | (14,944) | (13,965)
Oil and Gas | Intersegment | Upstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (7,002) | (12,335) | (13,679)
Oil and Gas | Intersegment | Downstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (2,150) | (3,924) | (2,742)
Oil and Gas | Intersegment | Downstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (1,292) | (1,089) | (1,132)
Oil and Gas | Corporate And Eliminations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 77 | 246 | 236
Oil and Gas | Corporate, Non-Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 759 | 1,084 | 1,044
Oil and Gas | Corporate, Non-Segment [Member] | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 744 | 1,064 | 1,022
Oil and Gas | Corporate, Non-Segment [Member] | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 15 | 20 | 22
Oil and Gas | Intersegment Elimination | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (10,885) | (19,686) | (17,493)
Oil and Gas | Intersegment Elimination | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | $ (8,309) | $ (13,444) | $ (14,833)

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