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Balances and Transactions in Foreign Currencies - Summary of Balances and Transactions in Foreign Currencies (Detail)
€ in Millions, $ in Millions, $ in Millions
Dec. 31, 2023
USD ($)
Dec. 31, 2023
MXN ($)
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
MXN ($)
Dec. 31, 2022
EUR (€)
Disclosure of Balances and Transactions in Foreign Currencies [line items]            
Current assets   $ 67,738     $ 79,212  
Noncurrent assets   205,782     198,783  
Current liabilities   54,916     57,960  
Noncurrent liabilities   $ 84,899     $ 88,159  
U.S. Dollar            
Disclosure of Balances and Transactions in Foreign Currencies [line items]            
Current assets $ 15,850     $ 21,358    
Noncurrent assets 97     70    
Current liabilities 4,053     8,777    
Noncurrent liabilities $ 37,892     $ 43,359    
Euros            
Disclosure of Balances and Transactions in Foreign Currencies [line items]            
Current assets | €         € 0
Noncurrent assets | €         0
Current liabilities | €     180     214
Noncurrent liabilities | €         € 0