Revenues and Segment Information, Geographic Information by Country for Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Revenues by Geographic Area
Revenues	[1]	$ 144,766	$ 176,383	$ 113,977
Geographic Information by Country for Long-Lived Assets
Long-lived assets		32,649	33,173
U.S. [Member]
Operating Revenues by Geographic Area
Revenues		104,208	126,722	82,940
Geographic Information by Country for Long-Lived Assets
Long-lived assets		28,868	29,378
Canada [Member]
Operating Revenues by Geographic Area
Revenues		10,107	11,743	6,597
Geographic Information by Country for Long-Lived Assets
Long-lived assets		1,598	1,634
U.K. and Ireland [Member]
Operating Revenues by Geographic Area
Revenues		16,148	17,822	13,307
Geographic Information by Country for Long-Lived Assets
Long-lived assets		1,346	1,301
Mexico and Peru [Member]
Operating Revenues by Geographic Area
Revenues		6,438	8,396	3,855
Geographic Information by Country for Long-Lived Assets
Long-lived assets		837	860
Other Countries [Member]
Operating Revenues by Geographic Area
Revenues		$ 7,865	$ 11,700	$ 7,278

[1] Includes excise taxes on sales by certain of our foreign operations of $5,765 million, $5,194 million, and $5,645 million for the years ended December 31, 2023, 2022, and 2021.