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Equity Method Accounted Investees - Share of OCI (Details) $ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2021 MXN ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($)
Items that may be reclassified to consolidated net income: |  |  |  |
Total | $ 143 | $ 2,925 | $ (5,948) | $ 1,058
Items that may not be reclassified to consolidated net income in subsequent periods: |  |  |  |
Gain (loss) on remeasurements of the net defined benefit liability | $ 14 | 296 | (474) | (1,090)
Equity investments |  |  |  |
Items that may be reclassified to consolidated net income: |  |  |  |
Fair value changes |  | 32 | (14) |
Exchange differences on translating foreign operations |  | 2,893 | (5,934) | 1,058
Total |  | 2,925 | (5,948) | 1,058
Items that may not be reclassified to consolidated net income in subsequent periods: |  |  |  |
Gain (loss) on remeasurements of the net defined benefit liability |  | $ 590 | $ (111) | $ (389)

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