Amount of advance payment agreed to pay by third party for purchase of land.

No definition available.

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Namespace Prefix:	asurb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of grant offer under CARES Act.

+ References

No definition available.

+ Details

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Namespace Prefix:	asurb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of total purchase consideration for sale of land

+ References

No definition available.

+ Details

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Namespace Prefix:	asurb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of remaining balance of purchase consideration for sale of land

+ References

No definition available.

+ Details

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Namespace Prefix:	asurb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- Definition

The cash inflow from sales of property, plant and equipment, classified as investing activities. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_16_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

- Details

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Namespace Prefix:
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Subsequent Event: (Details) $ in Thousands, $ in Thousands							12 Months Ended
Subsequent Event: (Details) $ in Thousands, $ in Thousands	Mar. 03, 2021 MXN ($)	Feb. 19, 2021 MXN ($)	Feb. 18, 2021 USD ($)	Feb. 18, 2021 MXN ($)	May 12, 2020 USD ($)	May 12, 2020 MXN ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 MXN ($)
Puerto Rico (Aerostar)
Disclosure of non-adjusting events after reporting period [line items]
Amount Of Grant offer, CARES ACT					$ 33,417	$ 717,590	$ 33,417	$ 717,590
Impact on revenue from operations \| Puerto Rico (Aerostar)
Disclosure of non-adjusting events after reporting period [line items]
Amount Of Grant offer, CARES ACT			$ 10,577	$ 210,574
Agreements With Third Parties
Disclosure of non-adjusting events after reporting period [line items]
Advance payment agreed to pay by FONATUR		$ 50,000
Total consideration for sale of land		286,283
Remaining balance to be paid before july1, 2021		$ 236,283
Initial Payment received for sale of land	$ 50,000