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Operating Segments and Geographic Data - Segment Earnings (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | $ 14,824 | $ 9,195 | $ (497)
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 17,114 | 13,364 | 898
Operating Segments | Upstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 13,316 | 8,150 | (2,537)
Operating Segments | Upstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 3,278 | 3,640 | (2,054)
Operating Segments | Upstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 10,038 | 4,510 | (483)
Operating Segments | Downstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 3,798 | 5,214 | 3,435
Operating Segments | Downstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 2,103 | 2,938 | 1,307
Operating Segments | Downstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net Income (Loss) Attributable to Chevron Corporation | 1,695 | 2,276 | 2,128
Segment Reconciling Items |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest expense | (713) | (264) | (168)
Interest income | 137 | 60 | 58
Other | $ (1,714) | $ (3,965) | $ (1,285)

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