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Operating Segments and Geographic Data (Details 4) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | $ 34,779 | $ 42,105 | $ 105,291 | $ 118,564
Oil and Gas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 34,779 | 42,105 | 105,291 | 118,564
Oil and Gas | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 42,938 | 52,339 | 130,044 | 142,736
Oil and Gas | All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 275 | 270 | 775 | 775
Oil and Gas | Total All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 61 | 57 | 187 | 176
Oil and Gas | United States | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 20,096 | 23,453 | 59,641 | 62,301
Oil and Gas | United States | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (209) | (207) | (576) | (583)
Oil and Gas | United States | All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 270 | 264 | 763 | 759
Oil and Gas | United States | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (4,912) | (5,844) | (14,652) | (12,606)
Oil and Gas | International | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 22,842 | 28,886 | 70,403 | 80,435
Oil and Gas | International | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (5) | (6) | (12) | (16)
Oil and Gas | International | All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 5 | 6 | 12 | 16
Oil and Gas | International | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (3,247) | (4,390) | (10,101) | (11,566)
Oil and Gas | Upstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 7,508 | 8,774 | 23,883 | 23,353
Oil and Gas | Upstream | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 14,209 | 17,096 | 44,364 | 44,253
Oil and Gas | Upstream | United States | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 5,602 | 6,784 | 17,411 | 16,405
Oil and Gas | Upstream | United States | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (3,686) | (4,277) | (11,070) | (10,219)
Oil and Gas | Upstream | International | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 8,607 | 10,312 | 26,953 | 27,848
Oil and Gas | Upstream | International | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (3,015) | (4,045) | (9,411) | (10,681)
Oil and Gas | Downstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 27,210 | 33,274 | 81,221 | 95,035
Oil and Gas | Downstream | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 28,454 | 34,973 | 84,905 | 97,708
Oil and Gas | Downstream | United States | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 14,224 | 16,405 | 41,467 | 45,137
Oil and Gas | Downstream | United States | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | (1,017) | (1,360) | (3,006) | (1,804)
Oil and Gas | Downstream | International | Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | 14,230 | 18,568 | 43,438 | 52,571
Oil and Gas | Downstream | International | Intersegment Eliminations |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Sales and other operating revenues | $ (227) | $ (339) | $ (678) | $ (869)

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