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Revenue from Contracts with Customers: (Details) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Income associated with intangible compulsory works | [1] | $ 15,672 | $ 35,154
Income associated with intangible complementary works | [2] | 296,703 | 152,140
Revenue from construction contracts |  | $ 312,375 | $ 187,294
[1] | Compulsory works. These are the works that the Concessionaire undertakes to execute in compliance with the Airport Adjustment and Modernization Plan.
[2] | Complementary works. These are the works that are not part of the Adequacy and Modernization Plan but are executed at the proposal of the Concessionaire, or at the request of the Grantors.

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- Definition The amount of income associated with intangible complementary works. + References No definition available. + Details
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Namespace Prefix: | asurb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of income associated with intangible compulsory works. + References No definition available. + Details
Name: | asurb_IncomeAssociatedWithIntangibleCompulsoryWorks
Namespace Prefix: | asurb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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