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Property, plant and equipment (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [abstract]  
Schedule of Cost of Investment Property, Plant and Equipment

Cost of property, plant and equipment is as follows (in millions of Mexican pesos):

 

  Land Buildings

Machinery and

equipment

 Transportation equipment Furniture, mixtures and computer equipment Constructions and machinery in-progress Total
                             
Balance to January 1, 2018   1,094   4,776   24,805   158   129    3,434   34,396
                             
Additions   137   90   1,305   1   11         1,370   2,914
Translation adjustments   (14)   (186)   (543)       (1)           (4)   (748)
Balance as of December 31, 2018   1,217 $ 4,680 $ 25,567 $ 159 $        139 $ 4,800 $   36,562
                             
Additions   89   591   532   2   4         53   1,271
Translation adjustments   (15)   (133)   (563)   0   (2)           (92)   (805)
Balance as of December 31, 2019 $ 1,291 $ 5,138 $ 25,536 $ 161 $        141 $ 4,761 $   37,028
Schedule of Accumulated Depreciation of Property, Plant and Equipment

Accumulated depreciation of property, plant and equipment is as follows (in millions of Mexican pesos):

 

  Buildings

Machinery and

equipment

 Transportation equipment Furniture, mixtures and computer equipment Total
                     
Balance to January 1, 2018   1,033   17,474   80   72   18,659  
                       
Depreciation expense   37   1,057   3   5   1,102  
Translation effects   (15)   (151)   (2)   (2)   (170)  
Balance as of December 31, 2018   1,055 $ 18,380 $ 81 $ 75 $ 19,591  
                       
Depreciation expense   30   1,063   4   2   1,099  
Translation effects   (3)   (396)   0   0   (399)  
Balance as of December 31, 2019 $ 1,082 $ 19,047 $ 85 $ 77 $ 20,291
Schedule of Net Book Value of Property, Plant and Equipment

The net book value of property, plant and equipment is as follows (in millions of Mexican pesos):

 

 

Net Book Value: Land Buildings

Machinery and

Equipment

 Transportation equipment Furniture, mixtures and computer equipment Constructions and machinery in-progress Total
                             
Balance as of December 31, 2017 $ 1,094 $ 3,743 $ 7,331 $ 78 $ 57 $ 3,434 $ 15,737
                             
Balance as of December 31, 2018 $ 1,217 $ 3,625 $ 7,187 $ 78 $ 64 $ 4,800 $ 16,971
                             
Balance as of December 31, 2019 $ 1,291 $ 4,056 $ 6,489 $ 76 $ 64 $ 4,761 $ 16,737