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Financial Instruments - Impact of hedging on equity (Details) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2023 MXN ($) | Dec. 31, 2022 MXN ($) | Dec. 31, 2021 MXN ($)
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | $ 337,801 | $ 335,117 | $ 307,187
Foreign currency revaluation of the net foreign operations | $ (305) | [1] | (5,153) | 3,677 | 350
Ending Balance | $ 22,392 | [2] | 378,369 | 337,801 | 335,117
Equity attributable to equity holders of the parent |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 262,604 | 262,601 | 237,743
Ending Balance |  |  | 303,860 | 262,604 | 262,601
Non-controlling interest |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 75,197 | 72,516 | 69,444
Ending Balance |  |  | 74,509 | 75,197 | 72,516
Impact Of Hedging Instruments |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 1,881 | 4,121 |
Financial instruments - purchases |  |  | (967) | (2,595) |
Change in fair value of financial instruments recognized in OCI |  |  | (3,995) | (4,610) |
Amount reclassified from OCI to profit or loss |  |  | 4,322 | 2,609 |
Foreign currency revaluation of the net foreign operations |  |  | 2,854 | 1,183 |
Effects of changes in foreign exchange rates |  |  | 1 | 10 |
Tax effect |  |  | (3,140) | 1,163 |
Ending Balance |  |  | 956 | 1,881 | 4,121
Impact Of Hedging Instruments | Equity attributable to equity holders of the parent |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 1,958 | 3,385 |
Financial instruments - purchases |  |  | (359) | (2,326) |
Change in fair value of financial instruments recognized in OCI |  |  | (1,917) | (3,110) |
Amount reclassified from OCI to profit or loss |  |  | 3,576 | 2,688 |
Foreign currency revaluation of the net foreign operations |  |  | 1,277 | 513 |
Effects of changes in foreign exchange rates |  |  | 1 | 4 |
Tax effect |  |  | (3,276) | 804 |
Ending Balance |  |  | 1,260 | 1,958 | 3,385
Impact Of Hedging Instruments | Forward contract |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | (223) | (124) |
Financial instruments - purchases |  |  | (350) | (223) |
Change in fair value of financial instruments recognized in OCI |  |  | (595) | (211) |
Amount reclassified from OCI to profit or loss |  |  | 848 | 303 |
Effects of changes in foreign exchange rates |  |  | 2 | 2 |
Tax effect |  |  | 45 | 30 |
Ending Balance |  |  | (273) | (223) | (124)
Impact Of Hedging Instruments | Currency swap contract |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 2,049 | 3,403 |
Financial instruments - purchases |  |  | 50 | (2,080) |
Change in fair value of financial instruments recognized in OCI |  |  | (1,514) | (3,231) |
Amount reclassified from OCI to profit or loss |  |  | 2,698 | 2,674 |
Foreign currency revaluation of the net foreign operations |  |  | 1,277 | 513 |
Effects of changes in foreign exchange rates |  |  | 0 | 1 |
Tax effect |  |  | (3,335) | 769 |
Ending Balance |  |  | 1,224 | 2,049 | 3,403
Impact Of Hedging Instruments | Interest rate swaps |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 111 | (34) |
Change in fair value of financial instruments recognized in OCI |  |  | 64 | 199 |
Amount reclassified from OCI to profit or loss |  |  | 201 |  |
Tax effect |  |  | (19) | (54) |
Ending Balance |  |  | 357 | 111 | (34)
Impact Of Hedging Instruments | Commodity price contracts |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 22 | 141 |
Financial instruments - purchases |  |  | (59) | (23) |
Change in fair value of financial instruments recognized in OCI |  |  | 128 | 133 |
Amount reclassified from OCI to profit or loss |  |  | (171) | (289) |
Effects of changes in foreign exchange rates |  |  | (1) | 1 |
Tax effect |  |  | 33 | 59 |
Ending Balance |  |  | (48) | 22 | 141
Impact Of Hedging Instruments | Non-controlling interest |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | (77) | 736 |
Financial instruments - purchases |  |  | (608) | (269) |
Change in fair value of financial instruments recognized in OCI |  |  | (2,078) | (1,500) |
Amount reclassified from OCI to profit or loss |  |  | 746 | (79) |
Foreign currency revaluation of the net foreign operations |  |  | 1,577 | 670 |
Effects of changes in foreign exchange rates |  |  | 0 | 6 |
Tax effect |  |  | 136 | 359 |
Ending Balance |  |  | $ (304) | $ (77) | $ 736
[1] | Convenience translation to U.S. dollars ($) – See Note 2.2.3
[2] | Convenience translation to U.S. dollars ($) – See Note 2.2.3

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