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Critical accounting judgments and key sources of estimation uncertainty: (Details) - MXN ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Critical accounting judgments and key sources of estimation uncertainty: |  |
Expected Revenue From Airplan | $ 19,217,035 | $ 23,474,154

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- Definition Represents expected revenue. + References No definition available. + Details
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Namespace Prefix: | asurb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration