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Other Assets and Other Financial Assets - Other financial assets (Details) $ in Millions, $ in Millions | Dec. 31, 2021 USD ($) | Dec. 31, 2021 MXN ($) | Dec. 31, 2020 MXN ($)
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Categories of financial assets [abstract] |  |  |
Non-current accounts receivable |  | $ 1,245 | $ 983
Derivative financial instruments (see Note 21) |  | 16,710 | 14,283
Others |  | 674 | 334
Other investments in equity instruments |  | 22,442 | 16,786
Total other financial assets | $ 2,002 | $ 41,071 | $ 32,386

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