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Debt - Summary of Senior Notes Outstanding (Detail) - MXN ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings $ 507,043,629 $ 510,589,480
U.S. dollars [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 150,624,187 164,945,155
Mexican pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 83,377,777 53,554,397
Euros [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 114,882,469 129,358,533
Pound sterling [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 47,579,931 51,608,257
Brazilian reais [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 28,499,887 33,673,729
Japanese yen [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 1,542,968 1,924,847
Chilean pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 3,582,591 3,964,099
Senior Notes 1 [member] | U.S. dollars [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 150,624,187 164,945,155
Senior Notes 1 [member] | Mexican pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 83,377,777 53,554,397
Senior Notes 1 [member] | Euros [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 114,882,469 129,358,533
Senior Notes 1 [member] | Pound sterling [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 47,579,931 51,608,257
Senior Notes 1 [member] | Brazilian reais [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 28,499,887 33,673,729
Senior Notes 1 [member] | Japanese yen [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 1,542,968 1,924,847
Senior Notes 1 [member] | Chilean pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings $ 3,582,591 $ 3,964,099