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Activities of the Company - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2019
Series L Ordinary Shares [Member]
Disclosure of Parent Entity Information [line items]
Percentage of ownership	15.60%
Series B Share [Member]
Disclosure of Parent Entity Information [line items]
Percentage of ownership	9.40%
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	56.00%
The Coca-Cola Company [member]
Disclosure of Parent Entity Information [line items]
Percentage of ownership	27.80%
Percentage of voting rights	32.90%

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

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