XML 326 R123.htm IDEA: XBRL DOCUMENT v3.10.0.1

Finance income and finance costs - Summary of finance income and finance costs (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Material Income And Expense [Abstract]
Premium charges for redemption of bonds	$ 72	$ 238	$ 441
Unamortized Debt Issuance Costs and Fees	9	14	42
Fair value hedge adjustment	16	$ 4	$ (159)
Reclassification of cost of hedging out of reserves	$ 3

X

- References

No definition available.

+ Details

Name:	ifrs-full_MaterialIncomeAndExpenseAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash outflow for debt issue costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2017-01-01
-Paragraph 17
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_17&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_PaymentsForDebtIssueCosts
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Fair value hedge adjustment.

+ References

No definition available.

+ Details

Name:	rio_FairValueHedgeAdjustment
Namespace Prefix:	rio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Reclassification of cost of hedging to income statement and recognised within finance costs.

+ References

No definition available.

+ Details

Name:	rio_ReclassificationOfCostOfHedgingToIncomeStatementAndRecognisedWithinFinanceCosts
Namespace Prefix:	rio_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The premium charge associated with the redemption of bonds.

+ References

No definition available.

+ Details

Name:	rio_RedemptionPremiumAmount
Namespace Prefix:	rio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration