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Balances and Transactions in Foreign Currencies - Transactions (Details)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
 [1]
Dec. 31, 2024
MXN ($)
Dec. 31, 2023
MXN ($)
Dec. 31, 2022
MXN ($)
Disclosure of Balances and Transactions in Foreign Currencies [line items]        
Raw materials and consumables used   $ 126,040 $ 115,542 $ 84,984
Interest expense $ 959 20,002 14,916 15,853
All Currencies Other Than Peso        
Disclosure of Balances and Transactions in Foreign Currencies [line items]        
Revenues   8,098 16,395 7,024
Other Operating Revenues   1,522 5,984 2,081
Raw materials and consumables used   25,063 21,991 25,500
Interest expense   4,766 1,554 2,637
Consulting Fees   1,844 1,597 1,038
Asset Acquisitions   8 43 47
Share Disposition   0 3,120 0
Other   6,597 5,033 5,024
U.S. dollars        
Disclosure of Balances and Transactions in Foreign Currencies [line items]        
Revenues   8,008 13,322 6,373
Other Operating Revenues   1,522 5,981 2,080
Raw materials and consumables used   25,063 21,806 25,247
Interest expense   2,295 1,266 2,411
Consulting Fees   1,654 815 1,011
Asset Acquisitions   8 40 44
Share Disposition   0 0 0
Other   6,597 5,022 4,245
Euros        
Disclosure of Balances and Transactions in Foreign Currencies [line items]        
Revenues   69 3,064 651
Other Operating Revenues   0 1 1
Raw materials and consumables used   0 185 253
Interest expense   2,471 288 226
Consulting Fees   186 782 11
Asset Acquisitions   0 0 3
Share Disposition   0 3,120 0
Other   0 11 779
Other currencies        
Disclosure of Balances and Transactions in Foreign Currencies [line items]        
Revenues   21 9 0
Other Operating Revenues   0 2 0
Raw materials and consumables used   0 0 0
Interest expense   0 0 0
Consulting Fees   4 0 16
Asset Acquisitions   0 3 0
Share Disposition   0 0 0
Other   $ 0 $ 0 $ 0
[1] Convenience translation to U.S. dollars ($) – See Note 2.2.4