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Stockholders' Equity: (Details 1)	12 Months Ended
	Dec. 31, 2017
Not later than one year [member]
Dividend Incentive Tax Rate, Percentage	1.00%
Later than one year and not later than two years [member]
Dividend Incentive Tax Rate, Percentage	2.00%
Later than two years and not later than three years [member]
Dividend Incentive Tax Rate, Percentage	5.00%

X

- Definition

Represents the incentive tax rate applicable on the dividends declared

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: