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Revenue from Contracts with Customers: (Details Textual) $ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018 MXN ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 MXN ($)	Dec. 31, 2016 MXN ($)
Revenue from rendering of transport services	$ 279,625		$ 259,612	$ 230,343
Revenue from construction contracts	312,375		187,294
Airport Use Fee Prompt Payment Discount	45,293		43,802	41,057
Operating lease income	2,069,696		2,466,980	2,689,149
Fixed Lease Revenue	105,203		166,747	$ 264,920
Revenue from access fees on non-permanent ground transportation		$ 57,885
Revenue from access fees on car parking and related services		298,536
Airplan [Member]
Revenue from rendering of transport services	1,276,506		225,693
Aerostar [Member]
Revenue from rendering of transport services	$ 1,700,859		$ 939,042
Retail Sales [Member]
Revenue from construction contracts		$ 621,850

X

- Definition

The amount represents discount for prompt payment of airport use fee.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of fixed lease income for the period.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of revenue arising fromaccess fees on car parking and related services.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of revenue arising fromaccess fees on non-perminant ground transportation.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of operating lease income. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2019-01-01
-Name IFRS
-Number 16
-IssueDate 2018-01-01
-Paragraph 90
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2018-03-01&anchor=para_90_b&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of revenue arising from construction contracts. Construction contracts are contracts specifically negotiated for the construction of an asset or a combination of assets that are closely interrelated or interdependent in terms of their design, technology and function or their ultimate purpose or use. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of revenue arising from the rendering of transport services. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_BusinessCombinationsAxis=asurb_AirplanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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