XML 349 R239.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Share-based payments - Management Share Plans, Bonus Deferral Plans, Global Employee Share Plans and UK Share Plan (combined) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2019 £ / shares | Dec. 31, 2019 $ / shares | Dec. 31, 2018 £ / shares | Dec. 31, 2018 $ / shares
Management share plans, bonus deferral plans, global employee share plans and uk share plan (combined) [member] | Rio Tinto plc [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 3,042,020 | 3,042,020 | 3,473,092 | 3,473,092
Number of non-vested shares, awarded | 1,043,817 | 1,043,817 | 1,135,103 | 1,135,103
Number of non-vested shares, forfeited | (224,402) | (224,402) | (250,853) | (250,853)
Number of non-vested shares, Cancelled | (24,043) | (24,043) | (33,563) | (33,563)
Number of non-vested shares, vested | (1,224,379) | (1,224,379) | (1,281,759) | (1,281,759)
Number of non-vested shares at ending balance | 2,613,013 | 2,613,013 | 3,042,020 | 3,042,020
Weighted average fair value at grant date, non-vested shares at beginning balance | £ 31.43 |  | £ 27.23 |
Weighted average fair value at grant date, non-vested shares, awarded | 40.41 |  | 39.49 |
Weighted average fair value at grant date, non-vested shares, forfeited | 39.46 |  | 30.26 |
Weighted average fair value at grant date, non-vested shares, cancelled | 32.87 |  | 26.52 |
Weighted average fair value at grant date, non-vested shares, vested | 25.40 |  | 27.54 |
Weighted average fair value at grant date, non-vested shares ending balance | £ 37.14 |  | £ 31.43 |
Management share plans, bonus deferral plans, global employee share plans and uk share plan (combined) [member] | Rio Tinto Limited [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 2,613,930 | 2,613,930 | 2,933,237 | 2,933,237
Number of non-vested shares, awarded | 846,008 | 846,008 | 943,315 | 943,315
Number of non-vested shares, forfeited | (174,025) | (174,025) | (185,062) | (185,062)
Number of non-vested shares, Cancelled | (35,481) | (35,481) | (36,613) | (36,613)
Number of non-vested shares, vested | (976,763) | (976,763) | (1,040,947) | (1,040,947)
Number of non-vested shares at ending balance | 2,273,669 | 2,273,669 | 2,613,930 | 2,613,930
Weighted average fair value at grant date, non-vested shares at beginning balance | $ / shares |  | $ 61.71 |  | $ 54.15
Weighted average fair value at grant date, non-vested shares, awarded | $ / shares |  | 86.56 |  | 78.36
Weighted average fair value at grant date, non-vested shares, forfeited | $ / shares |  | 72.18 |  | 64.60
Weighted average fair value at grant date, non-vested shares, cancelled | $ / shares |  | 60.91 |  | 52.84
Weighted average fair value at grant date, non-vested shares, vested | $ / shares |  | 49.39 |  | 55.30
Weighted average fair value at grant date, non-vested shares ending balance | $ / shares |  | $ 75.46 |  | $ 61.71
Management share plans [member] | Rio Tinto plc [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 1,666,082 | 1,666,082 |  |
Number of non-vested shares at ending balance | 1,398,039 | 1,398,039 | 1,666,082 | 1,666,082
Weighted average fair value at grant date, non-vested shares at beginning balance | £ 32.52 |  |  |
Weighted average fair value at grant date, non-vested shares ending balance | £ 38.68 |  | £ 32.52 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 681,242 | 681,242 | 669,678 | 669,678
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | £ 43.68 |  | £ 40.03 |
Management share plans [member] | Rio Tinto Limited [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 1,520,292 | 1,520,292 |  |
Number of non-vested shares at ending balance | 1,363,601 | 1,363,601 | 1,520,292 | 1,520,292
Weighted average fair value at grant date, non-vested shares at beginning balance | $ / shares |  | $ 64.06 |  |
Weighted average fair value at grant date, non-vested shares ending balance | $ / shares |  | $ 78.67 |  | $ 64.06
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 582,948 | 582,948 | 570,173 | 570,173
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 93.05 |  | $ 80.87
Bonus deferral plans [member] | Rio Tinto plc [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 203,900 | 203,900 |  |
Number of non-vested shares at ending balance | 192,878 | 192,878 | 203,900 | 203,900
Weighted average fair value at grant date, non-vested shares at beginning balance | £ 37.86 |  |  |
Weighted average fair value at grant date, non-vested shares ending balance | £ 41.95 |  | £ 37.86 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 163,076 | 163,076 | 221,198 | 221,198
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | £ 42.53 |  | £ 37.69 |
Bonus deferral plans [member] | Rio Tinto Limited [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 127,423 | 127,423 |  |
Number of non-vested shares at ending balance | 87,930 | 87,930 | 127,423 | 127,423
Weighted average fair value at grant date, non-vested shares at beginning balance | $ / shares |  | $ 71.93 |  |
Weighted average fair value at grant date, non-vested shares ending balance | $ / shares |  | $ 87.81 |  | $ 71.93
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 85,142 | 85,142 | 108,001 | 108,001
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 97.30 |  | $ 75.36
Global employee share plans [member] | Rio Tinto plc [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 1,102,322 | 1,102,322 |  |
Number of non-vested shares at ending balance | 982,932 | 982,932 | 1,102,322 | 1,102,322
Weighted average fair value at grant date, non-vested shares at beginning balance | £ 28.68 |  |  |
Weighted average fair value at grant date, non-vested shares ending balance | £ 33.98 |  | £ 28.68 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 543,426 | 543,426 | 451,710 | 451,710
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | £ 43.04 |  | £ 39.06 |
Global employee share plans [member] | Rio Tinto Limited [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 966,215 | 966,215 |  |
Number of non-vested shares at ending balance | 822,138 | 822,138 | 966,215 | 966,215
Weighted average fair value at grant date, non-vested shares at beginning balance | $ / shares |  | $ 56.66 |  |
Weighted average fair value at grant date, non-vested shares ending balance | $ / shares |  | $ 68.82 |  | $ 56.66
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 421,614 | 421,614 | 473,420 | 473,420
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | $ / shares |  | $ 91.50 |  | $ 78.78
UK share plan [member] | Rio Tinto plc [Member] |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Number of non-vested shares at beginning balance | 69,716 | 69,716 |  |
Number of non-vested shares at ending balance | 39,164 | 39,164 | 69,716 | 69,716
Weighted average fair value at grant date, non-vested shares at beginning balance | £ 29.90 |  |  |
Weighted average fair value at grant date, non-vested shares ending balance | £ 37.86 |  | £ 29.90 |
Number of vested awards settled in shares during the year (including dividend shares applied on vesting) | 34,196 | 34,196 | 16,968 | 16,968
Weighted average share price, Vested awards settled in shares during the year (including dividend shares applied on vesting) | £ 42.21 |  | £ 38.21 |

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

X
- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of equity-settled awards vested in share-based payment arrangement. + References No definition available. + Details
Name: | rio_NumberOfEquitysettledAwardsVestedInSharebasedPaymentArrangement
Namespace Prefix: | rio_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of other equity instruments cancelled. + References No definition available. + Details
Name: | rio_NumberOfOtherEquityInstrumentsCancelled
Namespace Prefix: | rio_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average fair value at grant date of nonvested shares cancelled. + References No definition available. + Details
Name: | rio_WeightedAverageFairValueAtGrantDateOfNonvestedSharesCancelled
Namespace Prefix: | rio_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average share price of equity-settled awards vested in share-based payment arrangement. + References No definition available. + Details
Name: | rio_WeightedAverageSharePriceOfEquitysettledAwardsVestedInSharebasedPaymentArrangement
Namespace Prefix: | rio_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=rio_ShareIncentivePlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=rio_RioTintoPlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=rio_RioTintoLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=rio_ManagementSharePlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=rio_BonusDeferralPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=rio_GlobalEmployeeSharePlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=rio_UkSharePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |