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Cash and cash equivalents: (Tables)
 12 Months Ended
Dec. 31, 2019
Cash and cash equivalents  
Schedule of cash and cash equivalents

 

 

 

 

 

 

 

 

 

 

December 31, 

 

    

2018

    

2019

 

 

 

 

 

 

 

Cash and cash held at banks

 

Ps.

3,743,212

 

Ps.

3,642,037

Short term investments

 

 

841,295

 

 

2,550,642

 

 

 

 

 

 

 

Total cash and cash equivalents

 

Ps.

4,584,507

 

Ps.

6,192,679