Investments and Advances - Summary of Investment and Advances and Equity in Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Investments and Advances	$ 40,357	$ 38,756
Other non-equity method investments	339	296
Total investments and advances	40,696	39,052
Equity in Earnings	5,657	(472)	$ 3,968
United States | Investments and Advances
Schedule of Equity Method Investments [Line Items]
Total investments and advances	8,540	7,978
United States | Equity in Earnings
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	1,889	709	641
International | Investments and Advances
Schedule of Equity Method Investments [Line Items]
Total investments and advances	32,156	31,074
International | Equity in Earnings
Schedule of Equity Method Investments [Line Items]
Equity in Earnings	3,768	(1,181)	3,327
All Other
Schedule of Equity Method Investments [Line Items]
Investments and Advances	(10)	(14)
Equity in Earnings	1	0	0
Upstream | Operating Segments
Schedule of Equity Method Investments [Line Items]
Investments and Advances	28,571	27,653
Equity in Earnings	3,509	(1,140)	2,787
Upstream | Operating Segments | Tengizchevroil
Schedule of Equity Method Investments [Line Items]
Investments and Advances	23,727	22,685
Equity in Earnings	2,831	1,238	3,067
Upstream | Operating Segments | Petropiar
Schedule of Equity Method Investments [Line Items]
Investments and Advances	0	0
Equity in Earnings	0	(1,396)	80
Upstream | Operating Segments | Petroboscan
Schedule of Equity Method Investments [Line Items]
Investments and Advances	0	0
Equity in Earnings	0	(1,112)	(11)
Upstream | Operating Segments | Caspian Pipeline Consortium
Schedule of Equity Method Investments [Line Items]
Investments and Advances	805	835
Equity in Earnings	155	159	155
Upstream | Operating Segments | Angola LNG Limited
Schedule of Equity Method Investments [Line Items]
Investments and Advances	2,180	2,258
Equity in Earnings	336	(166)	(26)
Upstream | Operating Segments | Other
Schedule of Equity Method Investments [Line Items]
Investments and Advances	1,859	1,875
Equity in Earnings	187	137	(478)
Downstream | Operating Segments
Schedule of Equity Method Investments [Line Items]
Investments and Advances	11,796	11,117
Equity in Earnings	2,147	668	1,181
Downstream | Operating Segments | Chevron Phillips Chemical Company LLC
Schedule of Equity Method Investments [Line Items]
Investments and Advances	6,455	6,181
Equity in Earnings	1,842	630	880
Downstream | Operating Segments | GS Caltex Corporation
Schedule of Equity Method Investments [Line Items]
Investments and Advances	3,616	3,547
Equity in Earnings	85	(185)	13
Downstream | Operating Segments | Other
Schedule of Equity Method Investments [Line Items]
Investments and Advances	1,725	1,389
Equity in Earnings	$ 220	$ 223	$ 288