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Summarized Financial Data - Chevron Phillips Chemical Company LLC (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 65,372	$ 36,117	$ 117,686	$ 67,193
Costs and other deductions	52,759	33,175	98,078	63,027
Net income attributable to equity method investee	11,622	3,082	17,881	4,459
Oil and Gas
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 65,372	$ 36,117	$ 117,686	67,193
Chevron Phillips Chemical Company LLC
Affiliate Statements Captions [Line Items]
Percentage of affiliate by summarized financial information	100.00%		100.00%
Summarized Financial Data - Chevron Transport Corporation
Costs and other deductions			$ 6,746	5,178
Net income attributable to equity method investee			1,308	1,544
Chevron Phillips Chemical Company LLC \| Oil and Gas
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues			$ 7,818	$ 6,452
Chevron Phillips Chemical Company LLC
Affiliate Statements Captions [Line Items]
Equity method investment, ownership percentage	50.00%		50.00%