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Property, Plant and Equipment, Net - Summary of Premises and Equipment (Detail)
$ in Millions, $ in Millions
Sep. 30, 2019
USD ($)
Sep. 30, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net $ 3,009 $ 59,405 $ 61,942
Land [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   5,272 5,575
Buildings [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   14,112 14,361
Machinery and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   20,520 21,496
Refrigeration equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   9,445 9,757
Returnable bottles [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   5,783 6,043
Investments in fixed assets in progress [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   3,584 4,131
Leasehold improvements [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   373 203
Other [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment, net   $ 316 $ 376