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Segment Information - Geographical segment information (Details) - MXN ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Geographical segment information:      
Total Net Sales $ 101,757,181 $ 101,282,333 $ 94,274,235
Assets 290,343,800 297,170,593  
Additions to Property, Plant and Equipment 19,108,284 18,708,491 16,759,566
Mexico      
Geographical segment information:      
Total Net Sales 88,388,569 85,011,567 81,308,749
Additions to Property, Plant and Equipment 18,804,629 18,696,116 16,709,852
Other countries      
Geographical segment information:      
Total Net Sales 13,368,612 16,270,766 12,965,486
Additions to Property, Plant and Equipment 303,655 12,375 49,714
Operating segment      
Geographical segment information:      
Total Net Sales 101,757,181 101,282,333 94,274,235
Assets 222,895,813 223,306,809 224,999,871
Additions to Property, Plant and Equipment 19,108,284 18,708,491 16,759,566
Operating segment | Mexico      
Geographical segment information:      
Assets 212,286,865 216,146,757 219,206,662
Operating segment | Other countries      
Geographical segment information:      
Assets $ 10,608,948 $ 7,160,052 $ 5,793,209