XML 53 R45.htm IDEA: XBRL DOCUMENT
v3.20.2

Financial instruments disclosures - Summary of borrowings in a hedge relationship (Details) - Interest rate risk - Borrowings in a Hedge Relationship - USD ($) $ in Millions | Jun. 30, 2020 | May 11, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Rio Tinto Finance plc Euro Bonds 2.0% due 2020 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | $ 526 |  |
Carrying Value | 0 |  | $ 455
Rio Tinto Finance plc Euro Bonds 2.875% due 2024 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 546 |  |
Carrying Value | 510 |  | 508
Rio Tinto Finance (USA) Limited Bonds 3.75% 2025 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 1,200 |  |
Carrying Value | 1,313 |  | 1,229
Rio Tinto Finance (USA) Limited Bonds 7.125% 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 750 |  |
Carrying Value | 1,033 |  | 958
Alcan Inc. Debentures 7.25% due 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 100 |  |
Carrying Value | 109 |  | 104
Rio Tinto Finance plc Sterling Bonds 4.0% due 2029 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 807 |  |
Carrying Value | 655 |  | 647
Alcan Inc. Debentures 7.25% due 2031 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 400 |  |
Carrying Value | 442 |  | 0
Alcan Inc. Global Notes 6.125% due 2033 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 750 |  |
Carrying Value | 747 |  | 0
Alcan Inc. Global Notes 5.75% due 2035 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 300 |  |
Carrying Value | 293 |  | 0
Rio Tinto Finance (USA) Limited Bonds 5.2% 2040 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 1,150 |  |
Carrying Value | 1,179 |  | 1,137
Rio Tinto Finance (USA) plc Bonds 4.75% 2042 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 500 |  |
Carrying Value | 506 |  | 483
Rio Tinto Finance (USA) plc Bonds 4.125% 2042 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Notional amount | 750 |  |
Carrying Value | $ 750 |  | $ 716
Fixed interest rate | Rio Tinto Finance plc Euro Bonds 2.0% due 2020 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 2.00% | 2.00% |
Fixed interest rate | Rio Tinto Finance plc Euro Bonds 2.875% due 2024 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 2.875% |  |
Fixed interest rate | Rio Tinto Finance (USA) Limited Bonds 3.75% 2025 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 3.75% |  |
Fixed interest rate | Rio Tinto Finance (USA) Limited Bonds 7.125% 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 7.125% |  |
Fixed interest rate | Alcan Inc. Debentures 7.25% due 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 7.25% |  |
Fixed interest rate | Rio Tinto Finance plc Sterling Bonds 4.0% due 2029 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 4.00% |  |
Fixed interest rate | Alcan Inc. Debentures 7.25% due 2031 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 7.25% |  |
Fixed interest rate | Alcan Inc. Global Notes 6.125% due 2033 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 6.125% |  |
Fixed interest rate | Alcan Inc. Global Notes 5.75% due 2035 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 5.75% |  |
Fixed interest rate | Rio Tinto Finance (USA) Limited Bonds 5.2% 2040 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 5.20% |  |
Fixed interest rate | Rio Tinto Finance (USA) plc Bonds 4.75% 2042 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 4.75% |  |
Fixed interest rate | Rio Tinto Finance (USA) plc Bonds 4.125% 2042 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings, interest rate | 4.125% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance plc Euro Bonds 2.0% due 2020 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 1.35% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance plc Euro Bonds 2.875% due 2024 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 1.64% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance (USA) Limited Bonds 3.75% 2025 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 1.39% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance (USA) Limited Bonds 7.125% 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 3.27% |  |
3 Month LIBOR, plus basis spread | Alcan Inc. Debentures 7.25% due 2028 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 5.43% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance plc Sterling Bonds 4.0% due 2029 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 2.65% |  |
3 Month LIBOR, plus basis spread | Alcan Inc. Debentures 7.25% due 2031 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 5.72% |  |
3 Month LIBOR, plus basis spread | Alcan Inc. Global Notes 6.125% due 2033 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 5.67% |  |
3 Month LIBOR, plus basis spread | Alcan Inc. Global Notes 5.75% due 2035 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 5.18% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance (USA) Limited Bonds 5.2% 2040 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 3.79% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance (USA) plc Bonds 4.75% 2042 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 3.42% |  |
3 Month LIBOR, plus basis spread | Rio Tinto Finance (USA) plc Bonds 4.125% 2042 |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Weighted average interest rate after swaps | 2.83% |  |

X
- Definition The average rate of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 23B -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_23B_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_AverageRateOfHedgingInstrument
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
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 nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying value of hedging instrument. + References No definition available. + Details
Name: | rio_CarryingValueOfHedgingInstrument
Namespace Prefix: | rio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_HedgedItemsAxis=rio_BorrowingsinaHedgeRelationshipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinancePlcEuroBondsTwoPointZeroPercentageDueTwoThousandAndTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinancePlcEuroBondsTwoPointEightSevenFivePercentageDueTwoThousandAndTwentyFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinanceUsaLimitedBondsThreePointSevenFivePercentageTwoThousandAndTwentyFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinanceUSALimitedBondsSevenPointOneTwoFivePercentageTwoThousandAndTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_AlcanIncDebenturesSevenPointTwoFivePercentageDueTwoThousandAndTwentyEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinancePlcSterlingBondsFourPointZeroPercentageDueTwoThousandAndTwentyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_AlcanIncDebentures725Due2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_AlcanIncGlobalNotes6125Due2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_AlcanIncGlobalNotes575Due2035Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinanceUSALimitedBondsFivePointTwoPercentageTwoThousandAndFortyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinanceUsaPlcBondsFourPointSevenFivePercentageTwoThousandAndFortyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=rio_RioTintoFinanceUSAPlcBondsFourPointOneTwoFiveTwoThousandAndFortyTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=ifrs-full_FixedInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=rio_ThreeMonthLIBORPlusBasisSpreadonVariableRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |