XML 378 R103.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Operating segments - Summary of depreciation and amortisation within the reportable segments (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | $ 4,384 | $ 4,015 | $ 4,375
Reportable segments [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 4,960 | 4,622 | 4,980
Reportable segments [Member] | Iron ore [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 1,723 | 1,702 | 1,667
Reportable segments [Member] | Aluminium [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 1,312 | 1,122 | 1,199
Reportable segments [Member] | Copper & Diamonds [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 1,320 | 1,317 | 1,452
Reportable segments [Member] | Energy & Minerals [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 428 | 455 | 630
Reportable segments [Member] | Other operations [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 177 | 26 | 32
Product group [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 4,960 | 4,622 | 4,980
Other items [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | 77 | 43 | 42
Depreciation and amortisation of equity accounted units [Member] |  |  |
Disclosure of operating segments [Line Items] |  |  |
Depreciation and amortisation expense proportionately consolidated | $ (653) | $ (650) | $ (647)

X
- Definition The amount of depreciation and amortisation expense. Depreciation and amortisation are the systematic allocations of depreciable amounts of assets over their useful lives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 23 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_23_e&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_28_e&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B13 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B13_d&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_102&doctype=Standard -URIDate 2019-03-27 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_99&doctype=Standard -URIDate 2019-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 104 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_104&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DepreciationAndAmortisationExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=ifrs-full_ReportableSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=rio_IronOreMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=rio_AluminiumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=rio_CopperAndDiamondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=rio_EnergyAndMineralsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentsAxis=rio_OtherOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=rio_ProductGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=rio_OtherItemsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SegmentConsolidationItemsAxis=rio_DepreciationAndAmortisationOfEquityAccountedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |