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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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