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Transactions with Related Parties - Compensation (Details) - MXN ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2015
Transactions with related parties |  |  |  |  |
Defined benefit obligation |  | $ 3,276,400 | $ 2,847,608 |  |
Service cost |  | 148,987 | 131,662 |  |
Contributions to plan, net defined benefit liability (asset) |  | 600 |  |  |
Directors, alternate directors and officers |  |  |  |  |
Transactions with related parties |  |  |  |  |
Key management compensation |  | 936,794 | 869,556 | $ 568,347 |
Defined benefit obligation |  | 196,584 | 170,856 | 148,651 |
Cumulative contributions made by the Group to the pension and seniority premium plans on behalf of these directors and officers |  | 71,744 | 82,768 | 90,901 |
Directors, alternate directors and officers | Cable |  |  |  |  |
Transactions with related parties |  |  |  |  |
Deferred compensation paid | $ 1,106,525 | 1,208 | 199,726 |  |
Officers | Cable |  |  |  |  |
Transactions with related parties |  |  |  |  |
Defined benefit obligation |  | 1,486,708 | 1,258,013 |  |
Deferred compensation plan term |  |  |  |  | 5 years
Service cost |  | 225,804 | 199,195 | 251,787 |
Contributions to plan, net defined benefit liability (asset) |  | 435,500 | $ 700,000 | $ 350,000 |
Deferred compensation paid |  | $ 470,000 |  |  |

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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_f&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_57_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2020-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2020-en-r&anchor=para_17&doctype=Standard -URIDate 2020-01-01 + Details
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