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Operating Segments and Geographic Data (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | $ 9,195 | $ (497) | $ 4,587
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 13,364 | 898 | 5,640
Operating Segments | Upstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 8,150 | (2,537) | (1,961)
Operating Segments | Upstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 3,640 | (2,054) | (4,055)
Operating Segments | Upstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 4,510 | (483) | 2,094
Operating Segments | Downstream |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 5,214 | 3,435 | 7,601
Operating Segments | Downstream | United States |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 2,938 | 1,307 | 3,182
Operating Segments | Downstream | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Net income (loss) attributable to Chevron Corporation | 2,276 | 2,128 | 4,419
Segment Reconciling Items |  |  |
Segment Reporting Information [Line Items] |  |  |
Interest expense | (264) | (168) | 0
Interest income | 60 | 58 | 65
Other | $ (3,965) | $ (1,285) | $ (1,118)

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