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Revenues and Segment Information, Geographic Information by Country for Revenue and Long-Lived Assets (Details) - USD ($) $ in Millions | 12 Months Ended
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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.

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