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Financial information by segments (Schedule of Information About Geographical Areas) (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of geographical areas [line items]
Revenue	$ 35,678,253	$ 28,700,450	$ 27,515,565
Mexico [Member]
Disclosure of geographical areas [line items]
Revenue	20,507,794	17,125,369	16,361,808
USA [Member]
Disclosure of geographical areas [line items]
Revenue	9,246,444	8,370,999	9,339,527
Brazil [Member]
Disclosure of geographical areas [line items]
Revenue	5,924,015	3,204,082	1,814,230
Canada [Member]
Disclosure of geographical areas [line items]
Revenue	267,606	370,803	350,673
Latin America [Member]
Disclosure of geographical areas [line items]
Revenue	60,578	30,173	34,932
Other (Europe and Asia) [Member]
Disclosure of geographical areas [line items]
Revenue	$ 20,658	$ 39,224	$ 25,236

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants.

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