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Share-Based Payments - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Share-based payment transactions expense | $ 510,000,000 | $ 169,000,000 | $ 340,000,000
Percentage of discount on market price of share for share based payments | 20.00% |  |
Share-based compensation number of shares issued | shares | 1,972,000,000 | 1,959,000,000 | 1,957,000,000
Fair value of stock options granted | $ 0 | $ 7.54 | $ 11.79
The Zenzele Kabili scheme [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Share-based payment transactions expense | $ 72,000,000 |  |
AB inBev [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Lock up Period for first half of bonus shares | 3 years |  |
Lock up Period for second half of bonus shares | 5 years |  |
Restricted Stock Units [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Share based payment vesting period first half | 3 years |  |
Share based payment vesting period other half | 5 years |  |
Share-based compensation number of shares issued | shares | 200,000 | 200,000 |
Share-based compensation grant date fair value | $ 9,000,000 | $ 9,000,000 |
Restricted Stock Units [member] | AB inBev [member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Exercise period of stock options | 5 years |  |
Stock options granted | 100,000 | 100,000 |
Fair value of stock options granted | $ 4,000,000 | $ 4,000,000 |
Long Term Incentive Warrant Plan [Member] |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares granted | shares | 3 |  |

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