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Interest Bearing Liabilities and Financing Facilities - Summary of Interest Bearing Liability and Financing Facility (Detail) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 28, 2015 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Beginning balance |  | $ 5,430 | $ 6,214 |
Repayments |  | (283) | (784) | $ (83)
Fair value adjustment and foreign exchange movement |  | (7) | (5) |
Transaction costs capitalised and amortised |  | (2) | 5 |
Ending balance |  | 5,138 | 5,430 | 6,214
Current |  | 260 | 277 |
Non-current |  | 4,878 | 5,153 |
Undrawn balance at 31 December |  | 4,050 | 3,100 |
US Bonds [member] |  |  |  |
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Beginning balance |  | 4,081 | 4,778 |
Repayments |  |  | (700) |
Transaction costs capitalised and amortised |  | 3 | 3 |
Ending balance |  | 4,084 | 4,081 | 4,778
Current |  | (3) | (2) |
Non-current |  | 4,087 | 4,083 |
Medium Term Notes [member] |  |  |  |
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Beginning balance |  | 592 | 597 |
Repayments |  | (200) |  |
Fair value adjustment and foreign exchange movement |  | (7) | (5) |
Transaction costs capitalised and amortised |  | 0 |  |
Ending balance |  | 385 | 592 | 597
Current |  | 185 | 200 |
Non-current |  | 200 | 392 |
Bilateral facilities [member] |  |  |  |
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Beginning balance |  | (4) | (4) |
Transaction costs capitalised and amortised |  | (1) |  |
Ending balance |  | (5) | (4) | (4)
Current |  | (2) | (2) |
Non-current |  | (3) | (2) |
Undrawn balance at 31 December |  | 2,050 | 1,900 |
Syndicate Facilities [member] |  |  |  |
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Beginning balance |  | 595 | 593 |
Transaction costs capitalised and amortised |  | (4) | 2 |
Ending balance |  | 591 | 595 | 593
Current |  | (3) | (2) |
Non-current |  | 594 | 597 |
Undrawn balance at 31 December |  | 2,000 | 1,200 |
JBIC facility [member] |  |  |  |
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Beginning balance |  | 166 | 250 |
Repayments |  | (83) | (84) |
Transaction costs capitalised and amortised |  | 0 |  |
Ending balance |  | 83 | 166 | $ 250
Current |  | $ 83 | 83 |
Non-current |  |  | $ 83 |
JBIC facility [member] | US Bonds [member] |  |  |  |
Schedule of detailed information about interest bearing liability and financing facility [line items] |  |  |  |
Repayments | $ (83) |  |  |

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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2022-03-24 -Paragraph 26 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=23&code=ifrs-tx-2022-en-r&anchor=para_26_a&doctype=Standard -URIDate 2022-03-24 + Details
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