XML 502 R119.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Goodwill - Key assumptions calculation of fair value less costs of disposal (Detail) - Richards Bay Minerals - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure of key assumptions calculation of fair value less costs of disposal [Line Items] |  |
Fair value less costs of disposal, post-tax discount rate | 8.60% | 8.60%
Five Percentage Increase In The Titanium Slag Price |  |
Disclosure of key assumptions calculation of fair value less costs of disposal [Line Items] |  |
Corresponding increase (decrease) in FVLCD | $ 144 | $ 217
One Percentage Increase In The Discount Rate Applied To Posttax Cash Flows |  |
Disclosure of key assumptions calculation of fair value less costs of disposal [Line Items] |  |
Fair value less costs of disposal, post-tax discount rate | 1.00% |
Corresponding increase (decrease) in FVLCD | $ (135) | (175)
Ten Percentage Strengthening Of South African Rand |  |
Disclosure of key assumptions calculation of fair value less costs of disposal [Line Items] |  |
Strengthening percentage of the South African rand | 10.00% |
Corresponding increase (decrease) in FVLCD | $ 232 | $ 272
Titanium | Five Percentage Increase In The Titanium Slag Price |  |
Disclosure of key assumptions calculation of fair value less costs of disposal [Line Items] |  |
Percentage of increase in the titanium slag price | 5.00% |

X
- Definition The discount rate used in the current measurement of fair value less costs of disposal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2024-01-01 -Paragraph 130 -Subparagraph f -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2024-en-r&anchor=para_130_f_iii&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_DiscountRateUsedInCurrentMeasurementOfFairValueLessCostsOfDisposal
Namespace Prefix: | ifrs-full_
Data Type: | dtr-2022:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Disclosure of key assumptions calculation of fair value less costs of disposal [Line Items] + References No definition available. + Details
Name: | rio_DisclosureOfKeyAssumptionsCalculationOfFairValueLessCostsOfDisposalLineItems
Namespace Prefix: | rio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase (Decrease) In Recoverable Amount Of Asset Or Cash-Generating Unit + References No definition available. + Details
Name: | rio_IncreaseDecreaseInRecoverableAmountOfAssetOrCashGeneratingUnit
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of increase in slag price. + References No definition available. + Details
Name: | rio_PercentageOfIncreaseInSlagPrice
Namespace Prefix: | rio_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Strengthening percentage of foreign currency. + References No definition available. + Details
Name: | rio_StrengtheningPercentageOfForeignCurrency
Namespace Prefix: | rio_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsAxis=rio_RichardsBayMineralsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis=rio_FivePercentageIncreaseInTheTitaniumSlagPriceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis=rio_OnePercentageIncreaseInTheDiscountRateAppliedToPosttaxCashFlowsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis=rio_TenPercentageStrengtheningOfSouthAfricanRandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=rio_TitaniumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |