XML 268 R9.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Group statement of changes in equity (Parenthetical) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share buy-back	[1]	$ 1,135	$ 5,704	$ (2,397)
Own shares purchased from owners of Rio Tinto		$ 1,552	$ 5,386	$ 2,083
[1] In 2019, the total amount of US$1,135 million (2018: US$5,704 million, 2017: US$2,397 million) includes own shares purchased from the owners of Rio Tinto as per the cash flow statement of US$1,552 million (2018: US$5,386 million, 2017: US$2,083 million) and a financial liability recognised in respect of an irrevocable contract in place as at the reporting date to cover the share buy-back programme, less amounts paid during the year in respect of a similar irrevocable contract in place at the beginning of the year.

X

- Definition

The cash outflow to acquire or redeem entity's shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2019-01-01
-Paragraph 17
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_17_b&doctype=Standard
-URIDate 2019-03-27

+ Details

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

X

- Definition

Purchase of entity shares pursuant to share buy back.

+ References

No definition available.

+ Details

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