Accrued liabilities - Other liabilities, short-term and long-term (Details) $ in Thousands, $ in Thousands	24 Months Ended
Dec. 31, 2020 MXN ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 MXN ($)	Dec. 31, 2019 MXN ($)
Accrued liabilities
Current maturities		$ 5,074	$ 101,218	$ 407,190
Non-current		$ 133,727	$ 2,667,683	$ 1,469,595
Cancellations, or write off related to liabilities	$ 0

The amount of non-current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Non-current liabilities]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard
-URIDate 2020-01-01

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant