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Activities of the Company - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017
Disclosure of Parent Entity Information [line items]
Percentage of remaining ownership	25.00%
Fomento Economico Mexicano S.A.B. de C.V. [member]
Disclosure of Parent Entity Information [line items]
Percentage of ownership	47.20%
Percentage of voting rights	63.00%
The Coca-Cola Company [member]
Disclosure of Parent Entity Information [line items]
Percentage of ownership	27.80%
Percentage of voting rights	37.00%

X

- Definition

The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]]

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- Definition

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