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Share-Based Payments - LTI Stock Option Plan Executives - Additional Information (Detail) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2020 USD ($) shares | Jun. 30, 2019 USD ($) shares
Long Term Incentive Stock Option Plan [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Stock options granted |  | 100,000
Fair value of stock options granted | $ |  | $ 2
Long Term Incentive Stock Option Plan [member] | Executive [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Stock options granted | 3,600,000 | 300,000
Long Term Incentive Stock Option Plan [member] | Executive [member] | AB inBev [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Stock options granted | 34,300,000 | 1,000,000
Fair value of stock options granted | $ | $ 241 | $ 11
Long Term Restricted Stock Unit Program One [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share based payment vesting period | 5 years |
Long Term Restricted Stock Unit Program One [member] | Executive [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Stock options granted | 6,900,000 |
Fair value of stock options granted | $ | $ 301 |
Long Term Restricted Stock Unit Program Two [member] | Bottom of range [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Restricted stock units, vesting period | five years |
Restricted stock units, vesting period variance | 2 years 6 months |
Long Term Restricted Stock Unit Program Two [member] | Top of range [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Restricted stock units, vesting period variance | 3 years |
Long Term Restricted Stock Unit Program Two [member] | Executive [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Stock options granted | 800,000 | 0
Long term restricted stock unit program two series two [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Restricted stock units, vesting period variance | 5 years |
Long term restricted stock unit program two series two [member] | Bottom of range [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Restricted stock units, vesting period | ten years |
Performance Share Unit [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share-based compensation grant date fair value | 0 | 300,000
Performance Share Unit [member] | AB inBev [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Number of shares grant the right to receive | 1 |
Long Term Restricted Stock Unit Program Three [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share based payment vesting period | 5 years |
Share-based compensation grant date fair value | 100,000 | 100,000
Share-based compensation grant date fair value | $ | $ 1 | $ 1

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