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Investments and Advances - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Variable Interest Entity [Line Items] |  |  |
Percentage of affiliate by summarized financial information | 100.00% |  |
Chevron's loan to affiliates | $ 4,278 | $ 4,704 | $ 5,153
Other revenues from transactions with related party | 16,286 | 10,796 | 6,038
Purchased crude oil and products | 145,416 | 92,249 | 52,148
Accounts and notes receivable due from affiliated companies | 907 | 1,454 |
Accounts payable due to affiliated companies | $ 709 | 552 |
Chevron Phillips Chemical Company LLC |  |  |
Variable Interest Entity [Line Items] |  |  |
Percentage of affiliate by summarized financial information | 100.00% |  |
Affiliated Entity | Oil and Gas, Purchased |  |  |
Variable Interest Entity [Line Items] |  |  |
Purchased crude oil and products | $ 10,171 | $ 5,778 | $ 3,003
Tengizchevroil LLP |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 50.00% |  |
Chevron investment carrying value over underlying equity in TCO's net assets | $ 90 |  |
Notes receivable from affiliate | $ 4,500 |  |
Petropiar |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 30.00% |  |
Petroboscan |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 39.20% |  |
Carrying amount of long-term debt | $ 560 |  |
Caspian Pipeline Consortium |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 15.00% |  |
Angola LNG Limited |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 36.40% |  |
Chevron Phillips Chemical Company LLC |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 50.00% |  |
Chevron's loan to affiliates | $ 59 |  |
GS Caltex Corporation |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 50.00% |  |
Golden Triangle Polymers Project | Chevron Phillips Chemical Company LLC |  |  |
Variable Interest Entity [Line Items] |  |  |
Equity method investment, ownership percentage | 51.00% |  |

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