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Events After the Balance Sheet Date - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 11, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Principal amount redeemed |  | $ 3,100 |  |
Investments in associates and joint ventures |  | $ 5,874 | $ 6,143 |
Anadolu Efes [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Proportion of ownership interest in associate and joint venture |  | 24.00% |  |
Investments in associates and joint ventures |  | $ 201 |  |
AB InBev Efes [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Investments in associates |  | $ 1,143 | $ 1,135 | $ 1,132
Proportion of indirect ownership interest |  | 50.00% |  |
AB InBev Efes [member] | Non-controlling interest [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Proportion of ownership interest in associate |  | 50.00% |  |
Investments in associates |  | $ 1,100 |  |
Announcement of plan to discontinue operation [member] | AB InBev Efes [member] | Non-controlling interest [member] |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |
Proportion of ownership interest in associate | 50.00% |  |  |

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