Summarized Financial Data – Chevron Phillips Chemical Company LLC - Summary of Income Statement Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
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	$ 140,826	$ 102,145	$ 140,980
Net Income (Loss) Attributable to Chevron Corporation	$ 15,625	(5,543)	2,924
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	$ 10,862	7,221	7,863
Net Income (Loss) Attributable to Chevron Corporation	3,684	1,260	1,760
Chevron Phillips Chemical Company LLC \| Oil and Gas
Summarized Financial Data - Chevron Transport Corporation
Sales and other operating revenues	$ 14,104	$ 8,407	$ 9,333
Chevron Phillips Chemical Company LLC
Subsidiary Statements Captions [Line Items]
Equity method investment, ownership percentage	50.00%

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