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Financial Instruments - Impact of hedging on equity (Details) $ in Millions, $ in Millions | 7 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 MXN ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 MXN ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($)
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | $ 307,187 | $ 325,751 |
Foreign currency revaluation of the net foreign operations | $ 840 | $ 17 | 350 | 1,060 | $ 991
Ending Balance | 335,117 | $ 16,336 | 335,117 | 307,187 | 325,751
Total controlling interest |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 237,743 | 251,989 |
Ending Balance | 262,601 |  | 262,601 | 237,743 | 251,989
Non-controlling interest |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 69,444 | 73,762 | 78,489
Ending Balance | 72,516 |  | 72,516 | 69,444 | 73,762
Impact Of Hedging Instruments |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 1,580 | (74) |
Financial instruments - purchases |  |  | 1,816 | (2,465) |
Change in fair value of financial instruments recognized in OCI |  |  | 5,086 | 6,208 |
Amount reclassified from OCI to profit or loss |  |  | (1,883) | 2,779 |
Foreign currency revaluation of the net foreign operations |  |  | (1,490) | (4,118) |
Effects of changes in foreign exchange rates |  |  | 5 | 121 |
Tax effect |  |  | (992) | (871) |
Ending Balance | 4,121 |  | 4,121 | 1,580 | (74)
Impact Of Hedging Instruments | Total controlling interest |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 1,854 | 534 |
Financial instruments - purchases |  |  | 1,274 | (2,347) |
Change in fair value of financial instruments recognized in OCI |  |  | 2,998 | 4,389 |
Amount reclassified from OCI to profit or loss |  |  | (1,558) | 1,637 |
Foreign currency revaluation of the net foreign operations |  |  | (654) | (1,694) |
Effects of changes in foreign exchange rates |  |  | 3 | 50 |
Tax effect |  |  | (531) | (713) |
Ending Balance | 3,385 |  | 3,385 | 1,854 | 534
Impact Of Hedging Instruments | Forward agreements to purchase foreign currency |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | (541) | (156) |
Financial instruments - purchases |  |  | 33 | (445) |
Change in fair value of financial instruments recognized in OCI |  |  | (13) | (223) |
Amount reclassified from OCI to profit or loss |  |  | 568 | 117 |
Effects of changes in foreign exchange rates |  |  | 3 | 3 |
Tax effect |  |  | (175) | 164 |
Ending Balance | (124) |  | (124) | (541) | (156)
Impact Of Hedging Instruments | Options to purchase foreign currency |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Financial instruments - purchases |  |  |  | 1 |
Amount reclassified from OCI to profit or loss |  |  |  | (1) |
Impact Of Hedging Instruments | Cross-currency swaps |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 2,729 | 679 |
Financial instruments - purchases |  |  | 1,040 | (2,069) |
Change in fair value of financial instruments recognized in OCI |  |  | 2,036 | 5,247 |
Amount reclassified from OCI to profit or loss |  |  | (1,587) | 1,540 |
Foreign currency revaluation of the net foreign operations |  |  | (654) | (1,694) |
Effects of changes in foreign exchange rates |  |  | 4 | 43 |
Tax effect |  |  | (165) | (1,016) |
Ending Balance | 3,403 |  | 3,403 | 2,729 | 679
Impact Of Hedging Instruments | Interest rate swap |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | (442) | (32) |
Change in fair value of financial instruments recognized in OCI |  |  | 584 | (639) |
Amount reclassified from OCI to profit or loss |  |  | 0 | 46 |
Effects of changes in foreign exchange rates |  |  |  | 7 |
Tax effect |  |  | (175) | 176 |
Ending Balance | (34) |  | (34) | (442) | (32)
Impact Of Hedging Instruments | Treasury Lock contracts |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  |  | 34 |
Amount reclassified from OCI to profit or loss |  |  |  | (48) |
Tax effect |  |  |  | 15 |
Ending Balance |  |  |  |  | 34
Impact Of Hedging Instruments | Commodity price contracts |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | 109 | 11 |
Financial instruments - purchases |  |  | 202 | 166 |
Change in fair value of financial instruments recognized in OCI |  |  | 390 | 4 |
Amount reclassified from OCI to profit or loss |  |  | (539) | (17) |
Effects of changes in foreign exchange rates |  |  | (4) | (4) |
Tax effect |  |  | (16) | (51) |
Ending Balance | 141 |  | 141 | 109 | 11
Impact Of Hedging Instruments | Non-controlling interest |  |  |  |  |
Disclosure of detailed information about hedged items [line items] |  |  |  |  |
Beginning Balance |  |  | (274) | (608) |
Financial instruments - purchases |  |  | 541 | (117) |
Change in fair value of financial instruments recognized in OCI |  |  | 2,088 | 1,819 |
Amount reclassified from OCI to profit or loss |  |  | (325) | 1,142 |
Foreign currency revaluation of the net foreign operations |  |  | (836) | (2,424) |
Effects of changes in foreign exchange rates |  |  | 2 | 71 |
Tax effect |  |  | (460) | (158) |
Ending Balance | $ 736 |  | $ 736 | $ (274) | $ (608)

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