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Segment Information - Geographical segment information (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Geographical segment information: |  |  |
Revenue | $ 97,361,634 | $ 101,757,181 | $ 101,282,333
Assets | 271,246,332 | 290,343,892 |
Additions to Property, Plant and Equipment | 20,131,738 | 19,108,284 | 18,708,491
Mexico |  |  |
Geographical segment information: |  |  |
Revenue | 84,664,293 | 88,388,569 | 85,011,567
Additions to Property, Plant and Equipment | 19,707,436 | 18,804,629 | 18,696,116
Other countries |  |  |
Geographical segment information: |  |  |
Revenue | 12,697,341 | 13,368,612 | 16,270,766
Additions to Property, Plant and Equipment | 424,302 | 303,655 | 12,375
Operating segment |  |  |
Geographical segment information: |  |  |
Revenue | 97,361,634 | 101,757,181 | 101,282,333
Assets | 227,316,463 | 222,201,935 | 223,306,809
Additions to Property, Plant and Equipment | 20,131,738 | 19,108,284 | 18,708,491
Operating segment | Mexico |  |  |
Geographical segment information: |  |  |
Assets | 215,395,954 | 211,592,987 | 216,146,757
Operating segment | Other countries |  |  |
Geographical segment information: |  |  |
Assets | $ 11,920,509 | $ 10,608,948 | $ 7,160,052

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