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Company Business - Summary of Significant Investments in Subsidiaries (Parenthetical) (Detail) |  | 12 Months Ended
--- | --- | ---
Dec. 13, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Parent Entity Information [line items] |  |  |
Country of incorporation |  | Mexico |
Farmacias Yza [member] |  |  |
Disclosure Of Parent Entity Information [line items] |  |  |
Percent of ownership interest |  | 18.60% |
Grupo Socofar [member] |  |  |
Disclosure Of Parent Entity Information [line items] |  |  |
Percent of ownership interest | 40.00% | 100.00% | 60.00%

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