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Impairment reversal (impairment and disposals) of non-current assets (Details 1) t in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) t | Dec. 31, 2022 USD ($) t
Iron Ore Pellets [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Carrying amount | $ | $ 1,473 | $ 1,367
Impairment testing results | The recoverable amount of the operating segments is higher than the carrying amount and, therefore, there is no impairment to be recognized. | The recoverable amount of the operating segments is higher than the carrying amount and, therefore, there is no impairment to be recognized.
Measurement of recoverable value | FVLCD | FVLCD
Discount rate | 7.00% | 6.40%
Period of cash flow projections | 2053 | 2052
Sensitivity of key assumptions | A 34% reduction in the long-term prices of all commodities or a 61% reduction in reserves would, alone, result in estimated recoverable amount equal to the carrying value of this CGU. | A 29% reduction in the long-term prices of all commodities or a 51% reduction in reserves would, alone, result in estimated recoverable amount equal to the carrying value of this CGU.
Iron Ore Pellets [Member] | Bottom of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Range iron ore forecasted prices | 75 | 75
Iron Ore Pellets [Member] | Top of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Range iron ore forecasted prices | 98 | 95
Nickel Operations [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Carrying amount | $ | $ 1,789 | $ 1,822
Impairment testing results | The recoverable amount of the operating segments is higher than the carrying amount and, therefore, there is no impairment to be recognized. | The recoverable amount of the operating segments is higher than the carrying amount and, therefore, there is no impairment to be recognized.
Measurement of recoverable value | FVLCD | FVLCD
Period of cash flow projections | 2034-2048 | 2032-2048
Sensitivity of key assumptions | A 12.5% reduction in the long-term prices of all commodities would, alone, result in estimated recoverable amount equal to the carrying value of this group of CGUs. | A 23.7% reduction In the long-term prices of all commodities would, alone, result in estimated recoverable amount equal to the carrying value of this group of CGUs.
Nickel Operations [Member] | Bottom of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Discount rate | 5.60% | 4.50%
Range iron ore forecasted prices | 18,000 | 21,000
Nickel Operations [Member] | Top of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Discount rate | 5.90% | 5.30%
Range iron ore forecasted prices | 23,000 | 24,000
Research And Development Project [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Carrying amount | $ | $ 568 | $ 528
Impairment testing results | The recoverable amount of the cash generating unit is higher than the carrying amount and, therefore, there is no impairment to be recognised. | The recoverable amount of the cash generating unit is higher than the carrying amount and, therefore, there is no impairment to be recognised.
Measurement of recoverable value | FVLCD | FVLCD
Discount rate | 7.00% | 6.40%
Sensitivity of key assumptions | A 7.5% reduction in the prices of all commodities or an 67% reduction in in processing and beneficiating iron ore volumes would, alone, result in estimated recoverable amount equal to the carrying value of this asset. | A 12.5% reduction in the prices of all commodities or an A 77% reduction in in processing and beneficiating iron ore volumes would, alone, result in estimated recoverable amount equal to the carrying value of this asset.
Beginning of operation and useful life | 16 years of useful life considering the beginning of operation in 2025 | 16 years of useful life considering the beginning of operation in 2025
Research And Development Project [Member] | Bottom of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Range iron ore forecasted prices | 80 | 85
Research And Development Project [Member] | Top of range [member] |  |
IfrsStatementLineItems [Line Items] |  |
Range iron ore forecasted prices | 98 | 95

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- Definition The description of key assumptions on which management has based its cash flow projections for the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). Key assumptions are those to which the unit's (group of units') recoverable amount is most sensitive. [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph d -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_d_i&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 135 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_135_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The explanation of the value(s) assigned to key assumption(s) on which management has based its determination of recoverable amount for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph f -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_f_ii&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 135 -Subparagraph e -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_135_e_ii&doctype=Standard -URIDate 2023-03-23 + Details
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