XML 177 R170.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Borrowings and other financial liabilities - Summary of borrowings and other financial liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure of borrowings and other financial liabilities [Line Items] |  |
Borrowings and other financial liabilities | $ 15,148 | $ 17,470
Total non-current borrowings including overdrafts (as above) | 14,624 | 16,913
Total current borrowings including overdrafts (as above) | 552 | 717
Total current borrowings and other financial liabilities | 904 | 922
Total other financial liabilities | 345 | 239
Total borrowings including overdrafts (as above) | 15,176 | 17,630
Total borrowings and other financial liabilities | 16,052 | 18,392
Derivative financial instruments [member] |  |
Disclosure of borrowings and other financial liabilities [Line Items] |  |
Borrowings and other financial liabilities | 481 | 517
Total other current financial liabilities | 50 | 6
Total other financial liabilities | 531 | 523
Other financial liability [Member] |  |
Disclosure of borrowings and other financial liabilities [Line Items] |  |
Borrowings and other financial liabilities | 43 | 40
Total other current financial liabilities | 302 | 199
Total other financial liabilities | 345 | 239
Total Other financial liabilities [member] |  |
Disclosure of borrowings and other financial liabilities [Line Items] |  |
Borrowings and other financial liabilities | 524 | 557
Total other current financial liabilities | 352 | 205
Total other financial liabilities | $ 876 | $ 762

X
- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current borrowings and current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_LongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities; Current financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2016-01-13 -Paragraph B13 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_B13_b&doctype=Appendix&seq=2 -URIDate 2016-03-31 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 54 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_54_m&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_OtherCurrentFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 54 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_54_m&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_OtherFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of non-current financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2016-01-13 -Paragraph B13 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2016-03-30&anchor=para_B13_c&doctype=Appendix&seq=2 -URIDate 2016-03-31 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 54 -Subparagraph m -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_54_m&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_OtherNoncurrentFinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2016-01-13 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_55&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_ShorttermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Disclosure of borrowings and other financial liabilities [Line Items] + References No definition available. + Details
Name: | rio_DisclosureOfBorrowingsAndOtherFinancialLiabilitiesLineItems
Namespace Prefix: | rio_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=rio_DerivativeFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=rio_OtherFinancialLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=rio_NetOtherFinancialLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |