Disclosures about Segments and Related Information (Schedule of Geographic Sales And Other Operating Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment reporting revenue reconciling item [Line Items]
Revenues	$ 83,130	$ 83,083
Sales and other operating revenue
Segment reporting revenue reconciling item [Line Items]
Revenues	81,058	80,411
United States | Sales and other operating revenue
Segment reporting revenue reconciling item [Line Items]
Revenues	34,607	30,656
Non-U.S. | Sales and other operating revenue
Segment reporting revenue reconciling item [Line Items]
Revenues	46,451	49,755
Canada | Sales and other operating revenue
Segment reporting revenue reconciling item [Line Items]
Revenues	6,990	7,055
United Kingdom | Sales and other operating revenue
Segment reporting revenue reconciling item [Line Items]
Revenues	5,840	5,160
Singapore | Sales and other operating revenue
Segment reporting revenue reconciling item [Line Items]
Revenues	$ 3,833	$ 4,018