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Deferred Tax Assets and Liabilities - Summary of Deferred Tax Assets and Liabilities by Type of Temporary Difference (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | $ 1,969 | $ 2,019 |
Liabilities | (12,204) | (12,627) |
Net | (10,235) | (10,607) | $ (11,105)
Netting by taxable entity, Assets | (1,743) | (1,771) |
Netting by taxable entity, Liabilities | 1,743 | 1,771 |
Net deferred tax assets/(liabilities), Assets | 1,969 | 2,019 |
Net deferred tax assets/(liabilities), Liabilities | (12,204) | (12,627) |
Property, Plant and Equipment [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 91 | 398 |
Liabilities | (2,113) | (2,487) |
Net | (2,023) | (2,089) |
Intangibles [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 60 | 106 |
Liabilities | (9,796) | (10,007) |
Net | (9,736) | (9,901) |
Inventory [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 88 | 86 |
Liabilities | (66) | (65) |
Net | 22 | 22 |
Trades and Other Receivables [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 48 | 62 |
Net | 48 | 62 |
Interest Bearing Loans and Borrowings [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 905 | 858 |
Liabilities | (628) | (603) |
Net | 277 | 255 |
Employee Benefits [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 577 | 648 |
Liabilities | (8) | (8) |
Net | 569 | 640 |
Provisions [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 511 | 525 |
Liabilities | (19) | (30) |
Net | 492 | 495 |
Derivatives [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 11 | 13 |
Liabilities | (118) | (46) |
Net | (107) | (33) |
Other Items [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 407 | 312 |
Liabilities | (1,198) | (1,152) |
Net | (792) | (840) |
Loss Carry Forwards [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 1,015 | 782 |
Net | 1,015 | 782 |
Gross Deferred Tax Assets/(Liabilities) [member] |  |  |
Disclosure Of Deferred Taxes [line items] |  |  |
Assets | 3,713 | 3,790 |
Liabilities | (13,947) | (14,398) |
Net | $ (10,235) | $ (10,607) |

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