Operating Segments and Geographic Data - Segment Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total Assets	$ 257,709	$ 239,535
Goodwill	4,722	4,385
United States
Segment Reporting Information [Line Items]
Total Assets	93,783	73,992
International
Segment Reporting Information [Line Items]
Total Assets	159,204	161,158
Upstream
Segment Reporting Information [Line Items]
Goodwill	4,370
Downstream
Segment Reporting Information [Line Items]
Goodwill	352
Operating Segments
Segment Reporting Information [Line Items]
Total Assets	236,326	229,636
Operating Segments | Upstream
Segment Reporting Information [Line Items]
Total Assets	183,105	184,412
Goodwill	4,370	4,385
Operating Segments | Upstream | United States
Segment Reporting Information [Line Items]
Total Assets	44,246	41,870
Operating Segments | Upstream | International
Segment Reporting Information [Line Items]
Total Assets	134,489	138,157
Operating Segments | Downstream
Segment Reporting Information [Line Items]
Total Assets	53,221	45,224
Goodwill	352	0
Operating Segments | Downstream | United States
Segment Reporting Information [Line Items]
Total Assets	31,676	26,376
Operating Segments | Downstream | International
Segment Reporting Information [Line Items]
Total Assets	21,193	18,848
Segment Reconciling Items
Segment Reporting Information [Line Items]
Total Assets	21,383	9,899
Segment Reconciling Items | United States
Segment Reporting Information [Line Items]
Total Assets	17,861	5,746
Segment Reconciling Items | International
Segment Reporting Information [Line Items]
Total Assets	$ 3,522	$ 4,153