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Finance Cost and Income - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of finance income expense [line items] |  |  |  |
Share based payment of net (loss) gain |  | $ 23 | $ 1,211 | $ 898
Difference on share based payment gain loss |  | 1,188 |  |
Interest expense on lease liabilities |  | 123 | 116 | 124
Interest expenses |  | 3,684 | 4,016 | 4,168
Net finance income/(cost) excluding exceptional items |  | 4,803 | 5,959 | 4,355
Mark to market gain (loss) |  | 25 | 1,008 | 878
Unwinding of discount |  | 349 | 306 | 374
Interest expense on bonds |  | 67 | 102 | 110
Interest on provisions |  | 54 | 41 | 42
Brazilian tax credits | $ 226 | 226 | 481 |
Income from interest on brazilian tax credits |  | 118 | 315 | 118
Gain (loss) on early termination |  | 741 | 795 | 84
Gain (loss) on remeasurement of deferred considerations |  | 19 | 80 | 90
Foreign exchange translation losses on intragroup loans |  |  |  | 52
Delta Corporation Ltd [member] |  |  |  |
Disclosure of finance income expense [line items] |  |  |  |
Write off company investment |  | 22 | $ 15 | 188
Brazilian federal tax regularization program [member] |  |  |  |
Disclosure of finance income expense [line items] |  |  |  |
Interest expenses |  |  |  | $ 34
SAB [member] |  |  |  |
Disclosure of finance income expense [line items] |  |  |  |
Income from interest on brazilian tax credits |  | $ 226 |  |
Top of range [member] |  |  |  |
Disclosure of finance income expense [line items] |  |  |  |
Borrowing costs capitalised |  | 4.00% |  |

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