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Financial Risk Management - Summary of Ratio of the Shareholders' Equity to Total Liabilities (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 MXN ($)	Dec. 31, 2018 MXN ($)	Dec. 31, 2017 MXN ($)
Disclosure Of Financial Instruments [Abstract]
Shareholders’ equity –controlling interest	$ 19,628,172	$ 20,708,985	$ 21,028,215
Total liabilities	$ 20,908,361	$ 17,778,352	$ 17,440,763
Ratio of total Shareholders’ equity – controlling interest to liabilities	0.9	1.2	1.2

Expiry date 2020-01-01: The amount of present obligations of the entity arising from past events, the settlement of which is expected to result in an outflow from the entity of resources embodying economic benefits. Effective 2020-01-01: The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

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