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Operating Segments and Geographic Data (Details 4) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | $ 29,705 | $ 34,189
Oil and Gas |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 29,705 | 34,189
Oil and Gas | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 37,050 | 42,370
Oil and Gas | All Other |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 212 | 224
Oil and Gas | Total All Other |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 65 | 66
Oil and Gas | United States | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 15,862 | 18,492
Oil and Gas | United States | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (145) | (156)
Oil and Gas | United States | All Other |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 210 | 222
Oil and Gas | United States | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (4,217) | (4,622)
Oil and Gas | International | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 21,188 | 23,878
Oil and Gas | International | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (2) | (2)
Oil and Gas | International | All Other |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 2 | 2
Oil and Gas | International | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (3,128) | (3,559)
Oil and Gas | Upstream |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 8,126 | 8,440
Oil and Gas | Upstream | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 13,479 | 15,251
Oil and Gas | Upstream | United States | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 4,466 | 5,882
Oil and Gas | Upstream | United States | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (2,812) | (3,519)
Oil and Gas | Upstream | International | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 9,013 | 9,369
Oil and Gas | Upstream | International | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (2,541) | (3,292)
Oil and Gas | Downstream |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 21,514 | 25,683
Oil and Gas | Downstream | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 23,359 | 26,895
Oil and Gas | Downstream | United States | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 11,186 | 12,388
Oil and Gas | Downstream | United States | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | (1,260) | (947)
Oil and Gas | Downstream | International | Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | 12,173 | 14,507
Oil and Gas | Downstream | International | Intersegment Eliminations |  |
Segment Reporting Information [Line Items] |  |
Sales and other operating revenues | $ (585) | $ (265)

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