Revenues and Segment Information, Geographic Information by Country for Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Revenues by Geographic Area
Revenues	[1]	$ 122,687	$ 129,881	$ 144,766
Geographic Information by Country for Long-Lived Assets
Long-lived assets		30,408	32,055
U.S. [Member]
Operating Revenues by Geographic Area
Revenues		87,819	93,311	104,208
Geographic Information by Country for Long-Lived Assets
Long-lived assets		26,544	28,359
Canada [Member]
Operating Revenues by Geographic Area
Revenues		8,137	8,577	10,107
Geographic Information by Country for Long-Lived Assets
Long-lived assets		1,567	1,414
U.K. and Ireland [Member]
Operating Revenues by Geographic Area
Revenues		15,830	15,236	16,148
Geographic Information by Country for Long-Lived Assets
Long-lived assets		1,512	1,484
Mexico and Peru [Member]
Operating Revenues by Geographic Area
Revenues		5,168	5,405	6,438
Geographic Information by Country for Long-Lived Assets
Long-lived assets		785	798
Other Countries [Member]
Operating Revenues by Geographic Area
Revenues		$ 5,733	$ 7,352	$ 7,865

[1] Includes excise taxes on sales by certain of our foreign operations of $6,748 million, $5,907 million, and $5,765 million for the years ended December 31, 2025, 2024, and 2023.