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Commitments - Summary of Authorized Investments (Detail) - MXN ($)
$ in Thousands
Dec. 12, 2019
Dec. 16, 2014
Commitments [Line Items]    
Total authorized/approved investments $ 21,831,705 $ 5,478,614
Less Than One Year [member]    
Commitments [Line Items]    
Total authorized/approved investments 6,739,392 1,412,232
Less Than Two Years [member]    
Commitments [Line Items]    
Total authorized/approved investments 5,995,303 1,842,569
Less Than Three Years [member]    
Commitments [Line Items]    
Total authorized/approved investments 5,396,186 1,157,684
Less Than Four Years [member]    
Commitments [Line Items]    
Total authorized/approved investments 2,650,026 759,337
Later than four years and not later than five years [Member]    
Commitments [Line Items]    
Total authorized/approved investments $ 1,050,798 $ 306,792