Other (income) expenses, net (Schedule of Other Income (Expenses) Net) (Details) - MXN ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Analysis of income and expense [abstract]
Cancellation of balances	$ 786	$ 2,615	$ 9,844
Uninstalling expenses of equipment Fuch			35,293
Land treatments in Pacific Steel, Inc.	8,922	7,674	9,833
Other expenses	9,708	10,289	54,970
Sale of scrap	(9,865)	(10,434)	(10,428)
Recovery of loss	(6,405)
Update of balances in favor in taxes	(2,699)	(519)	(1,739)
Other income	(5,791)	(6,270)	(6,605)
Other income	(24,760)	(17,223)	(18,772)
Other (income) and other expenses, net	$ (15,052)	$ (6,934)	$ 36,198

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'function of expense' form for its analysis of expenses.

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