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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

X

- 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

X

- References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfChangesInAccountingEstimatesAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration