XML 53 R45.htm IDEA: XBRL DOCUMENT
v3.21.2

Financial instruments disclosures - Summary of fair value of financial instruments (Detail) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020 | Jun. 30, 2020
--- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | $ 14,027 | $ 10,381 | $ 6,269
Investments in equity shares and funds | 3,660 | 3,764 |
Net assets | 58,169 | 51,903 |
Provisionally priced receivables | 1,940 | 1,671 |
Fair value |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 14,027 | 10,381 |
Investments in equity shares and funds | 113 | 75 |
Other investments, including loans and pooled funds | 2,955 | 2,899 |
Trade and other financial receivables | 3,794 | 3,286 |
Forward contracts and option contracts: designated as hedges | (118) | 53 |
Forward contracts and option contracts, not designated as hedges | 133 | 180 |
Derivatives related to net debt | 111 | 248 |
Trade and other financial payables | (5,767) | (5,847) |
Net assets | 15,248 | 11,275 |
Not held at fair value |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 6,829 | 3,970 |
Investments in equity shares and funds | 0 | 0 |
Other investments, including loans and pooled funds | 184 | 138 |
Trade and other financial receivables | 1,670 | 1,479 |
Forward contracts and option contracts: designated as hedges | 0 | 0 |
Forward contracts and option contracts, not designated as hedges | 0 | 0 |
Derivatives related to net debt | 0 | 0 |
Trade and other financial payables | (5,600) | (5,817) |
Net assets | 3,083 | (230) |
Level 1 | Fair value |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 7,198 | 6,411 |
Investments in equity shares and funds | 67 | 35 |
Other investments, including loans and pooled funds | 2,531 | 2,563 |
Trade and other financial receivables | 2 | 5 |
Forward contracts and option contracts: designated as hedges | 0 | 0 |
Forward contracts and option contracts, not designated as hedges | 0 | 0 |
Derivatives related to net debt | 0 | 0 |
Trade and other financial payables | 0 | 0 |
Net assets | 9,798 | 9,014 |
Level 2 | Fair value |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 0 | 0 |
Investments in equity shares and funds | 0 | 0 |
Other investments, including loans and pooled funds | 0 | 0 |
Trade and other financial receivables | 2,122 | 1,802 |
Forward contracts and option contracts: designated as hedges | 0 | 7 |
Forward contracts and option contracts, not designated as hedges | 54 | 69 |
Derivatives related to net debt | 111 | 248 |
Trade and other financial payables | (167) | (30) |
Net assets | 2,120 | 2,096 |
Level 3 | Fair value |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Cash and cash equivalents | 0 | 0 |
Investments in equity shares and funds | 46 | 40 |
Other investments, including loans and pooled funds | 240 | 198 |
Trade and other financial receivables | 0 | 0 |
Forward contracts and option contracts: designated as hedges | (118) | 46 |
Forward contracts and option contracts, not designated as hedges | 79 | 111 |
Derivatives related to net debt | 0 | 0 |
Trade and other financial payables | 0 | 0 |
Net assets | $ 247 | $ 395 |

X
- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_i&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CashAndCashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 22 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_22_b&doctype=Standard&book=b -URIDate 2020-01-01 + Details
Name: | ifrs-full_FinancialInstrumentsDesignatedAsHedgingInstrumentsAtFairValue
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2020-01-01 -Paragraph 24 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_24_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_InvestmentAccountedForUsingEquityMethod
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of assets less the amount of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 1 -IssueDate 2020-01-01 -Paragraph IG63 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2020-en-r&anchor=para_IG63&doctype=Implementation%20Guidance -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NetAssetsLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Derivative financial liabilities related to net debt at fair value. + References No definition available. + Details
Name: | rio_DerivativeFinancialLiabilitiesRelatedToNetDebtAtFairValue
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financial​ instruments not​ designated​ as hedging​ instruments​ at fair ​value. + References No definition available. + Details
Name: | rio_FinancialInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValue
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Other investments, including loans. + References No definition available. + Details
Name: | rio_OtherInvestmentsIncludingLoans
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Provisionally ​priced receivables. + References No definition available. + Details
Name: | rio_ProvisionallyPricedReceivables
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Trade and other financial payables. + References No definition available. + Details
Name: | rio_TradeAndOtherFinancialPayables
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Trade and other financial receivables. + References No definition available. + Details
Name: | rio_TradeAndOtherFinancialReceivables
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_MeasurementAxis=ifrs-full_AtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MeasurementAxis=rio_NotHeldAtFairValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level1OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level2OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_LevelsOfFairValueHierarchyAxis=ifrs-full_Level3OfFairValueHierarchyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |