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Financial Instruments - Summary of Sensitivity Analysis of Market Risks (Detail) - Market risk - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Forward agreement to purchase U.S. Dollar (MXN/USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (11.00%) | (19.00%) | (9.00%)
Effect on equity | $ (298) | $ (884) | $ (739)
Profit and loss effect | $ 0 | $ 0 | $ 0
Forward agreement to purchase U.S. Dollar (BRL/USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (16.00%) | (21.00%) | (13.00%)
Effect on equity | $ (284) | $ (357) | $ (155)
Profit and loss effect | $ 0 | $ 0 | $ 0
Forward agreement to purchase U.S. Dollar (COP/USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (11.00%) | (16.00%) | (10.00%)
Effect on equity | $ (81) | $ (142) | $ (54)
Profit and loss effect | $ 0 | $ 0 | $ 0
Forward agreement to purchase U.S. Dollar (ARS/USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (1.00%) | (2.00%) | (25.00%)
Effect on equity | $ (3) | $ (2) | $ (88)
Profit and loss effect | $ 0 | $ 0 | $ 0
Forward agreement to purchase U.S. Dollar (UYU/USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (4.00%) | (9.00%) | (5.00%)
Effect on equity | $ (7) | $ (21) | $ (23)
Profit and loss effect | $ 0 | $ 0 | $ 0
Forward agreement to purchase U.S. Dollar (CRC/USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (3.00%) |  |
Effect on equity | $ (10) |  |
Profit and loss effect | $ 0 |  |
Cross currency swaps (USD to MXN) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (11.00%) | (19.00%) | (9.00%)
Effect on equity | $ (1,645) | $ (5,507) | $ (2,315)
Profit and loss effect | $ 0 | $ 0 | $ 0
Cross currency swaps (USD to BRL) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | (16.00%) | (21.00%) | (13.00%)
Effect on equity | $ (2,300) | $ (2,161) | $ (645)
Profit and loss effect | 0 | 0 | 0
Sugar price contracts |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Effect on equity | (714) | (515) | (255)
Profit and loss effect | $ 0 | $ 0 | $ 0
Change on sugar Price | (28.00%) | (32.00%) | (24.00%)
Aluminum price contracts |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Profit and loss effect | $ 0 | $ 0 | $ 0
Change in Aluminum price | (24.00%) | (16.00%) | (15.00%)
Change in Aluminum price, effect on equity | $ (39) | $ (289) | $ (1,164)
Options to purchase foreign currency (MXN to USD) |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |
Change in USD rate | 0.00% | (10.00%) | (13.00%)
Effect on equity | $ 0 | $ (6) | $ (303)
Profit and loss effect | $ 0 | $ 0 | $ 0

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