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Financial risk management: Liquidity position (Details) $ in Thousands, $ in Thousands, $ in Thousands |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |
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Oct. 13, 2021 MXN ($) | Apr. 26, 2021 MXN ($) | Dec. 30, 2020 | Sep. 11, 2020 | Jun. 29, 2020 | May 12, 2020 MXN ($) | May 12, 2020 USD ($) | Apr. 23, 2020 MXN ($) | Apr. 01, 2020 MXN ($) | Apr. 01, 2020 USD ($) | Apr. 24, 2019 MXN ($) | Oct. 31, 2017 | Dec. 31, 2021 MXN ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 COP ($) | Dec. 31, 2020 USD ($) | Aug. 19, 2020 MXN ($) | Dec. 31, 2018 MXN ($) | Jun. 01, 2015 MXN ($) | Jun. 01, 2015 COP ($)
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and equivalents |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,770,062 |  | $ 5,192,628 |  | $ 6,192,679 |  |  |  |  | $ 4,584,507 |  |
Total Debt |  |  |  |  |  |  |  |  |  |  |  |  | 13,779,547 |  | 13,900,346 |  |  |  | $ 440,000,000 |  |  |  | $ 2,897,404 | $ 440,000,000
Debt term short |  |  |  |  |  |  |  |  |  |  |  |  | 578,144 |  | 1,138,750 |  |  |  |  |  |  |  |  |
Debt term long |  |  |  |  |  |  |  |  |  |  |  |  | 13,201,403 |  | 12,761,596 |  |  |  |  |  |  |  |  |
Deferment investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,292,355 |  |  |
Dividends |  |  |  |  |  |  |  | $ 2,463,000 |  |  | $ 3,000,000 |  | 2,463,000 |  |  |  | 3,000,000 |  |  |  |  |  |  |
Disposal of loans |  |  |  |  |  |  |  |  |  |  |  |  | 4,429,334 |  | 245,520 |  | $ 152,047 |  |  |  |  |  |  |
Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and equivalents |  |  |  |  |  |  |  |  |  |  |  |  | 5,700,314 |  | 4,058,495 |  |  |  |  |  |  |  |  |
Total Debt |  |  |  |  |  |  |  |  |  |  |  |  | 4,630,722 |  | 3,971,210 |  |  |  |  |  |  |  |  |
Debt term short |  |  |  |  |  |  |  |  |  |  |  |  | 6,964 |  | 322,209 |  |  |  |  |  |  |  |  |
Debt term long |  |  |  |  |  |  |  |  |  |  |  |  | 4,623,758 |  | 3,649,001 |  |  |  |  |  |  |  |  |
Deferment investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,533,480 |  |  | $ 2,292,355 |  |  |
Loans received |  |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  |  |  |  |  |  |  |  |  |
Puerto Rico (Aerostar) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and equivalents |  |  |  |  |  |  |  |  |  |  |  |  | 2,295,087 |  | 804,634 |  |  |  |  |  |  |  |  |
Total Debt |  |  |  |  |  |  |  |  |  |  |  |  | 6,952,069 |  | 7,171,278 |  |  |  |  |  |  |  |  |
Debt term short |  |  |  |  |  |  |  |  |  |  |  |  | 353,672 |  | 529,337 |  |  |  |  |  |  |  |  |
Debt term long |  |  |  |  |  |  |  |  |  |  |  |  | 6,598,397 |  | 6,641,941 |  |  |  |  |  |  |  |  |
Amount of aid subsidy received under CARES Act |  |  |  |  |  | $ 367,752 | $ 17,125 |  |  |  |  |  | 333,477 | $ 16,292 | 367,752 | $ 17,125 |  |  |  |  |  |  |  |
Term of loan |  |  | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of loans |  |  |  |  |  |  |  |  | $ 239,200 | $ 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Colombia (Airplan) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and equivalents |  |  |  |  |  |  |  |  |  |  |  |  | 774,661 |  | 329,499 |  |  |  |  |  |  |  |  |
Total Debt |  |  |  |  |  |  |  |  |  |  |  |  | 2,196,756 |  | 2,757,858 |  |  |  |  |  |  |  |  |
Debt term short |  |  |  |  |  |  |  |  |  |  |  |  | 217,508 |  | 287,204 |  |  |  |  |  |  |  |  |
Debt term long |  |  |  |  |  |  |  |  |  |  |  |  | 1,979,248 |  | 2,470,654 |  |  |  |  |  |  |  |  |
Term of loan |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liquidity risk |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,192,628 |  |  |  |  |  |  |  |  |
Forecast | Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferment investments |  |  |  |  |  |  |  |  |  |  |  |  | 3,533,480 |  |  |  |  |  |  |  |  |  |  |
BBVA Bancomer, S. A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan |  |  |  |  | 18 months |  |  |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |
Disposal of loans | $ 1,960,000 | $ 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
BBVA Bancomer, S. A. | Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of loans | $ 1,960,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bancolombia S |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan |  |  |  | 10 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bancolombia S | Liquidity risk |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Debt |  |  |  |  |  |  |  |  |  |  |  |  | 409,400 |  |  |  |  | 20,000 |  | $ 20,000 |  |  |  |
Banco Popular De Puerto Rico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan |  |  | 3 years |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of loans |  |  |  |  |  |  |  |  | $ 239,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Banco Popular De Puerto Rico | Mexico |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term of loan |  |  |  |  | 18 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aerostar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of risk management strategy related to hedge accounting [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of aid subsidy received under CARES Act |  |  |  |  |  |  |  |  |  |  |  |  | 333,477 | 16,292 | $ 367,752 | $ 17,125 |  |  |  |  |  |  |  |
Grant under CARES Act |  |  |  |  |  |  |  |  |  |  |  |  | 210,574 |  |  |  |  | 10,577 |  |  |  |  |  |
Amount of subsidy received |  |  |  |  |  |  |  |  |  |  |  |  | 20,122 | $ 983 |  |  |  |  |  |  |  |  |  |
Grant under ARPA Law |  |  |  |  |  |  |  |  |  |  |  |  | $ 731,106 |  |  |  |  | $ 35,716 |  |  |  |  |  |

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