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Contingencies and commitments - Summary of capital commitments (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of contingent liabilities [line items] |  |
Capital commitments | $ 5,556 | $ 4,385
Total for all joint ventures |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | 1,551 | 227
Due within 1 year |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | 4,559 | 3,662
Due within 1 year | Total for all joint ventures |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | 1,280 | 128
Between 1 and 3 years |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | 602 | 597
Between 1 and 3 years | Total for all joint ventures |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | 271 | 99
Between 3 and 5 years |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | 313 | 27
After 5 years |  |
Disclosure of contingent liabilities [line items] |  |
Capital commitments | $ 82 | $ 99

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- Definition The amount of future capital expenditures that the entity is committed to make. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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