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Investments and Advances - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Sales and other operating revenues	$ 193,414	$ 196,913	$ 235,717
Purchased crude oil and products	119,206	119,196	145,416
Accounts and notes receivable due from affiliated companies	1,258	1,480
Accounts payable due to affiliated companies	$ 556	591
Percentage of affiliate by summarized financial information	100.00%
Affiliated Entity
Variable Interest Entity [Line Items]
Chevron's loan to affiliates	$ 4,731	4,494	4,278
Sales and other operating revenues	13,850	13,623	16,286
Affiliated Entity | Oil and Gas, Purchased
Variable Interest Entity [Line Items]
Purchased crude oil and products	$ 6,547	$ 7,404	$ 10,171
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	$ 73
Principal balance	$ 4,500
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 Phillips Chemical Company LLC | Affiliated Entity
Variable Interest Entity [Line Items]
Chevron's loan to affiliates	$ 669
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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