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Subsequent Event: (Details)	3 Months Ended
	Mar. 31, 2020
Impact on revenue from operations
Disclosure of non-adjusting events after reporting period [line items]
Percentage of decrease in passengers	6.30%

X

- Definition

Percentage of decrease in passenger traffic due to outbreak of covid-19 pandemic during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	asurb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=asurb_ImpactOnRevenueFromOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: