Operating Segments and Geographic Data - Segment Sales and Operating Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	$ 235,717	$ 155,606	$ 94,471
Oil and Gas
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	235,717	155,606	94,471
Oil and Gas | Upstream
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	63,293	43,992	26,311
Oil and Gas | Downstream
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	172,308	111,490	68,083
Oil and Gas | Operating Segments
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	287,061	185,955	113,665
Oil and Gas | Operating Segments | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	143,161	86,934	47,910
Oil and Gas | Operating Segments | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	143,900	99,021	65,755
Oil and Gas | Operating Segments | Upstream
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	106,978	70,140	41,381
Oil and Gas | Operating Segments | Upstream | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	50,822	29,219	14,577
Oil and Gas | Operating Segments | Upstream | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	56,156	40,921	26,804
Oil and Gas | Operating Segments | Downstream
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	179,565	115,307	71,525
Oil and Gas | Operating Segments | Downstream | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	91,824	57,209	32,589
Oil and Gas | Operating Segments | Downstream | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	87,741	58,098	38,936
Oil and Gas | Corporate and Eliminations
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	116	124	77
Oil and Gas | Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	518	508	759
Oil and Gas | Corporate, Non-Segment | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	515	506	744
Oil and Gas | Corporate, Non-Segment | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	3	2	15
Oil and Gas | Intersegment | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(400)	(382)	(667)
Oil and Gas | Intersegment | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(2)	(2)	(15)
Oil and Gas | Intersegment | Upstream | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(29,870)	(15,154)	(8,068)
Oil and Gas | Intersegment | Upstream | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(13,815)	(10,994)	(7,002)
Oil and Gas | Intersegment | Downstream | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(5,529)	(2,296)	(2,150)
Oil and Gas | Intersegment | Downstream | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(1,728)	(1,521)	(1,292)
Oil and Gas | Intersegment Elimination | United States
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	(35,799)	(17,832)	(10,885)
Oil and Gas | Intersegment Elimination | International
Segment Reporting Information [Line Items]
Total Sales and Other Operating Revenues	$ (15,545)	$ (12,517)	$ (8,309)