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Operating Segments and Geographic Data - Segment Sales and Operating Revenues (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | $ 196,913 | $ 235,717 | $ 155,606
Oil and Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 196,913 | 235,717 | 155,606
Oil and Gas | Upstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 45,742 | 63,293 | 43,992
Oil and Gas | Downstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 151,038 | 172,308 | 111,490
Oil and Gas | Corporate, Non-Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 597 | 518 | 508
Oil and Gas | Corporate, Non-Segment | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 595 | 515 | 506
Oil and Gas | Corporate, Non-Segment | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 2 | 3 | 2
Oil and Gas | Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 246,142 | 287,061 | 185,955
Oil and Gas | Operating Segments | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 124,277 | 143,161 | 86,934
Oil and Gas | Operating Segments | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 121,865 | 143,900 | 99,021
Oil and Gas | Operating Segments | Upstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 83,920 | 106,978 | 70,140
Oil and Gas | Operating Segments | Upstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 40,115 | 50,822 | 29,219
Oil and Gas | Operating Segments | Upstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 43,805 | 56,156 | 40,921
Oil and Gas | Operating Segments | Downstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 161,625 | 179,565 | 115,307
Oil and Gas | Operating Segments | Downstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 83,567 | 91,824 | 57,209
Oil and Gas | Operating Segments | Downstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 78,058 | 87,741 | 58,098
Oil and Gas | Intersegment | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (462) | (400) | (382)
Oil and Gas | Intersegment | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (2) | (2) | (2)
Oil and Gas | Intersegment | Upstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (26,307) | (29,870) | (15,154)
Oil and Gas | Intersegment | Upstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (11,871) | (13,815) | (10,994)
Oil and Gas | Intersegment | Downstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (8,793) | (5,529) | (2,296)
Oil and Gas | Intersegment | Downstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (1,794) | (1,728) | (1,521)
Oil and Gas | Corporate and Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | 133 | 116 | 124
Oil and Gas | Intersegment Elimination | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | (35,562) | (35,799) | (17,832)
Oil and Gas | Intersegment Elimination | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Sales and Other Operating Revenues | $ (13,667) | $ (15,545) | $ (12,517)

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