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Post-employment Benefits - Plan assets (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Post-employment benefit plans |  |
Minimum investment required (as a percent) | 30.00% |
Weighted average asset allocation (as a percent) | 100.00% | 100.00%
Fair value of plan assets held by the trust | $ 119,851 | $ 101,690
Weighted average expected long-term rate of return of plan assets | 7.79% | 6.59%
Minimum |  |
Post-employment benefit plans |  |
Term for liquidity of mutual funds | 1 day |
Maximum |  |
Post-employment benefit plans |  |
Term for liquidity of mutual funds | 1 month |
Equity securities |  |
Post-employment benefit plans |  |
Target allocation (as a percent) | 30.00% |
Weighted average asset allocation (as a percent) | 32.70% | 28.80%
Fixed rate instruments |  |
Post-employment benefit plans |  |
Target allocation (as a percent) | 70.00% |
Weighted average asset allocation (as a percent) | 67.30% | 71.20%

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- Definition Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. + References No definition available. + Details
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. + References No definition available. + Details
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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References No definition available. + Details
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