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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, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Revenues by Geographic Area |  |  |  |
Revenues | [1] | $ 113,977 | $ 64,912 | $ 108,324
Geographic Information by Country for Long-Lived Assets |  |  |  |
Long-lived assets |  | 32,760 | 32,152 |
U.S. [Member] |  |  |  |
Operating Revenues by Geographic Area |  |  |  |
Revenues |  | 82,940 | 45,174 | 77,173
Geographic Information by Country for Long-Lived Assets |  |  |  |
Long-lived assets |  | 28,518 | 28,184 |
Canada [Member] |  |  |  |
Operating Revenues by Geographic Area |  |  |  |
Revenues |  | 6,597 | 4,294 | 7,915
Geographic Information by Country for Long-Lived Assets |  |  |  |
Long-lived assets |  | 1,855 | 1,877 |
U.K. and Ireland [Member] |  |  |  |
Operating Revenues by Geographic Area |  |  |  |
Revenues |  | 13,307 | 9,268 | 13,584
Geographic Information by Country for Long-Lived Assets |  |  |  |
Long-lived assets |  | 1,528 | 1,353 |
Other Countries [Member] |  |  |  |
Operating Revenues by Geographic Area |  |  |  |
Revenues |  | 11,133 | 6,176 | $ 9,652
Mexico and Peru [Member] |  |  |  |
Geographic Information by Country for Long-Lived Assets |  |  |  |
Long-lived assets |  | $ 859 | $ 738 |
[1] | Includes excise taxes on sales by certain of our foreign operations of $5,645 million, $4,797 million, and $5,595 million for the years ended December 31, 2021, 2020, and 2019.

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