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Subsequent Event: Investment commitments (Details) - MXN ($) $ in Thousands | Apr. 07, 2021 | Dec. 31, 2020
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Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments |  | $ 8,260,774
COVID-19 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments | $ 5,315,429 |
2021 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments |  | 5,460,586
2021 | COVID-19 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments | 3,064,148 |
2022 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments |  | 1,907,832
2022 | COVID-19 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments | 1,793,811 |
2023 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments |  | $ 892,356
2023 | COVID-19 |  |
Disclosure of non-adjusting events after reporting period [line items] |  |
Contractual capital commitments | $ 457,470 |

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- Definition The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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