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Revenue from Contracts with Customers: (Details Textual) $ in Thousands, $ in Thousands | 12 Months Ended
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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
Name: | asurb_AirportUseFeePromptPaymentDiscount
Namespace Prefix: | asurb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of fixed lease income for the period. + References No definition available. + Details
Name: | asurb_FixedLeaseRevenue
Namespace Prefix: | asurb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- 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

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

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

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

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

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- Details
Name: | ifrs-full_BusinessCombinationsAxis=asurb_AerostarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementClassOfStockAxis=asurb_RetailSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |