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Intangible Assets - Key Assumptions by CGU for Impairment Test (Detail) - MXN ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of information for cash-generating units [line items] |  |
Impairment charge, intangibles | $ 375 |
Mexico [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 7.40% | 7.30%
Post-tax WACC | 5.30% | 5.20%
Mexico [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 3.90% |
Expected Volume Growth Rates | 2.00% |
Mexico [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 3.50%
Expected Volume Growth Rates |  | 0.70%
Colombia [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 11.00% | 8.90%
Post-tax WACC | 7.30% | 6.20%
Colombia [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 2.80% |
Expected Volume Growth Rates | 4.10% |
Colombia [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 3.10%
Expected Volume Growth Rates |  | 4.00%
Costa Rica [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 15.30% | 13.80%
Post-tax WACC | 10.80% | 9.70%
Costa Rica [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 2.70% |
Expected Volume Growth Rates | 4.30% |
Costa Rica [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 2.20%
Expected Volume Growth Rates |  | 2.10%
Guatemala [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 10.60% | 9.10%
Post-tax WACC | 8.30% | 7.10%
Guatemala [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 3.10% |
Expected Volume Growth Rates | 6.80% |
Guatemala [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 4.00%
Expected Volume Growth Rates |  | 8.50%
Nicaragua [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 20.60% | 21.10%
Post-tax WACC | 13.90% | 12.40%
Nicaragua [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 3.70% |
Expected Volume Growth Rates | 7.10% |
Nicaragua [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 4.40%
Expected Volume Growth Rates |  | 3.00%
Panama [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 8.80% | 8.50%
Post-tax WACC | 6.80% | 6.60%
Panama [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 1.50% |
Expected Volume Growth Rates | 7.90% |
Panama [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 2.00%
Expected Volume Growth Rates |  | 5.40%
Argentina [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 26.30% | 21.60%
Post-tax WACC | 20.40% | 14.80%
Argentina [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 30.10% |
Expected Volume Growth Rates | 3.90% |
Argentina [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 39.20%
Expected Volume Growth Rates |  | 3.70%
Brazil [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 9.10% | 9.30%
Post-tax WACC | 6.00% | 5.60%
Brazil [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 3.00% |
Expected Volume Growth Rates | 2.40% |
Brazil [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 3.60%
Expected Volume Growth Rates |  | 2.00%
Uruguay [member] | Cash Generating Units [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 9.90% | 9.40%
Post-tax WACC | 7.10% | 6.80%
Uruguay [member] | Cash Generating Units [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 7.80% |
Expected Volume Growth Rates | 2.00% |
Uruguay [member] | Cash Generating Units [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 7.40%
Expected Volume Growth Rates |  | 2.00%
South America [member] | FEMSA Comercio - Health Division [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 8.30% | 9.40%
Post-tax WACC | 5.80% | 6.60%
South America [member] | FEMSA Comercio - Health Division [member] | 2021-2030 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 2.80% |
Expected Volume Growth Rates | 0.20% |
South America [member] | FEMSA Comercio - Health Division [member] | 2020-2029 [member] | Coca-Cola FEMSA [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term |  | 3.00%
Expected Volume Growth Rates |  | 0.30%
United States [member] | Cash Generating Units [member] |  |
Disclosure of information for cash-generating units [line items] |  |
Pre-tax WACC | 8.20% |
Post-tax WACC | 6.00% |
Impairment charge, intangibles | $ 10,169 |
United States [member] | Cash Generating Units [member] | 2021 - 2025 [Member] |  |
Disclosure of information for cash-generating units [line items] |  |
Expected Annual Long- Term | 2.00% |
Expected Volume Growth Rates | 1.70% |

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