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Operating Segments and Geographic Data (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | $ 4,047 | $ 1,952 | $ 11,094 | $ 6,084
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 4,752 | 2,303 | 12,965 | 6,794
Operating Segments | Upstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 3,379 | 489 | 10,026 | 2,859
Operating Segments | Upstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 828 | (26) | 2,314 | (48)
Operating Segments | Upstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 2,551 | 515 | 7,712 | 2,907
Operating Segments | Downstream |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 1,373 | 1,814 | 2,939 | 3,935
Operating Segments | Downstream | United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 748 | 640 | 1,847 | 1,743
Operating Segments | Downstream | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment Earnings | 625 | 1,174 | 1,092 | 2,192
All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest expense | (171) | (30) | (524) | (115)
Interest income | 37 | 13 | 84 | 42
Other | $ (571) | $ (334) | $ (1,431) | $ (637)

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