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Debt - Summary of Senior Notes Outstanding (Detail) - MXN ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings $ 564,030,102 $ 628,382,956
U.S. dollars [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 159,533,549 186,531,417
Mexican pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 51,656,585 51,282,881
Euros [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 167,396,781 224,928,934
Pound sterling [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 61,268,846 59,993,720
Japanese yen [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 2,325,617 2,511,701
Brazilian reais [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 20,286,578 32,533,191
Chilean pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 3,776,051 4,078,453
Senior Notes 1 [member] | U.S. dollars [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 159,533,549 186,531,417
Senior Notes 1 [member] | Mexican pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 51,656,585 51,282,881
Senior Notes 1 [member] | Euros [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 167,396,781 183,988,456
Senior Notes 1 [member] | Pound sterling [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 61,268,846 59,993,720
Senior Notes 1 [member] | Japanese yen [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 2,325,617 2,511,701
Senior Notes 1 [member] | Brazilian reais [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings 20,286,578 32,533,191
Senior Notes 1 [member] | Chilean pesos [member]    
Disclosure of Senior Notes Outstanding [Line Items]    
Borrowings $ 3,776,051 $ 4,078,453