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Summarized Financial Data - Chevron Phillips Chemical Company LLC - Summary of Income Statement Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Subsidiary Statements Captions [Line Items] |  |  |  |
Percentage of affiliate by summarized financial information | 100.00% |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |
Total costs and other deductions | $ 171,365 | $ 196,578 | $ 140,826 |
Net Income (Loss) Attributable to Chevron Corporation | $ 21,369 | 35,465 | 15,625 | $ (5,500)
Chevron Phillips Chemical Company LLC |  |  |  |
Subsidiary Statements Captions [Line Items] |  |  |  |
Percentage of affiliate by summarized financial information | 100.00% |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |
Total costs and other deductions | $ 10,561 | 12,870 | 10,862 |
Net Income (Loss) Attributable to Chevron Corporation | 1,173 | 1,662 | 3,684 |
Chevron Phillips Chemical Company LLC | Oil and Gas |  |  |  |
Summarized Financial Data - Chevron Transport Corporation |  |  |  |
Sales and other operating revenues | $ 11,560 | $ 14,180 | $ 14,104 |
Chevron Phillips Chemical Company LLC |  |  |  |
Subsidiary Statements Captions [Line Items] |  |  |  |
Equity method investment, ownership percentage | 50.00% |  |  |

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