XML 290 R87.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Contingencies and commitments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Disclosure Of Commitments And Contingent Liabilities [Abstract] |
Summary of capital commitments |
|  | 2018 |  |  | 2017 |
| US$m |  | US$m |
Capital commitments excluding the Group's share of joint venture capital commitments |  |  |  |  |  |
Within 1 year |  | 1,742 |  |  | 2,052 |
Between 1 and 3 years |  | 439 |  |  | 531 |
Between 3 and 5 years |  | 66 |  |  | 58 |
After 5 years |  | 36 |  |  | - |
Total |  | 2,283 |  |  | 2,641 |
Group's share of joint venture capital commitments |  |  |  |  |  |
Within 1 year |  | 115 |  |  | 29 |
Between 1 and 3 years |  | 1 |  |  | - |
Total |  | 116 |  |  | 29 |
Summary of aggregate amount of minimum lease payments under non-cancellable operating leases | The aggregate amounts of minimum lease payments under non-cancellable operating leases are as follows:
|  | 2018 |  |  | 2017 |
| US$m |  | US$m |
Within 1 year |  | 475 |  |  | 397 |
Between 1 and 3 years |  | 587 |  |  | 542 |
Between 3 and 5 years |  | 270 |  |  | 313 |
After 5 years |  | 385 |  |  | 593 |
Total |  | 1,717 |  |  | 1,845 |
Summary of aggregate amount of future payment commitments under purchase obligations outstanding |
|  |  |  | Adjusted (a) |
| 2018 |  | 2017 |
| US$m |  | US$m |
Within 1 year |  | 2,804 |  |  | 2,874 |
Between 1 and 2 years |  | 1,565 |  |  | 1,712 |
Between 2 and 3 years |  | 1,344 |  |  | 1,401 |
Between 3 and 4 years |  | 1,097 |  |  | 1,282 |
Between 4 and 5 years |  | 882 |  |  | 1,026 |
After 5 years |  | 9,358 |  |  | 11,185 |
Total |  | 17,050 |  |  | 19,480 |
(a)The 2017 comparative has been amended to correctly reflect certain purchase obligations at 31 December 2017. The impact is a reduction in future payment commitments of US$309 million.
Summary of subsidiaries and joint operations contingent liabilities |
|  | 2018 |  |  | 2017 |
| US$m |  | US$m |
Contingent liabilities (subsidiaries and joint operations) |  |  |  |  |  |
Indemnities and other performance guarantees (a) (b) |  | 317 |  |  | 552 |
(a) | Indemnities and other performance guarantees represent the potential outflow of funds from the Group for the satisfaction of obligations including those under contractual arrangements (for example undertakings related to supplier agreements) not provided for in the balance sheet, where the likelihood of the guarantees or indemnities being called is assessed as possible rather than probable or remote.
(b) | There were no material contingent liabilities arising in relation to the Group’s joint ventures and associates.

X
- Definition The disclosure of commitments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_10_e&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfCommitmentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of contingent liabilities. [Refer: Contingent liabilities [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 86 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_86&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfContingentLiabilitiesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of a maturity analysis of operating lease payments. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2019-01-01 -Name IFRS -Number 16 -IssueDate 2017-01-01 -Paragraph 97 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=16&date=2017-03-01&anchor=para_97&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of aggregate amount of future payment commitments under purchase obligations outstanding. + References No definition available. + Details
Name: | rio_DisclosureOfAggregateAmountOfFuturePaymentCommitmentsUnderPurchaseObligationsOutstandingExplanatory
Namespace Prefix: | rio_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure Of Commitments And Contingent Liabilities [Abstract] + References No definition available. + Details
Name: | rio_DisclosureOfCommitmentsAndContingentLiabilitiesAbstract
Namespace Prefix: | rio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration