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Property, plant and equipment - Summary of owned and leased assets (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, plant and equipment [abstract]
Property, plant and equipment – owned	$ 63,793	$ 62,007
Right of use assets – leased	1,134	875
Net book value	$ 64,927	$ 62,882

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- References

No definition available.

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

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- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2021-01-01
-Paragraph 53
-Subparagraph j
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_j&doctype=Standard
-URIDate 2021-03-24

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Balance Type:	debit
Period Type:	instant

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- Definition

Property, Plant and Equipment And Right Of Use Assets, Lease

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No definition available.

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Namespace Prefix:	rio_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Property, Plant and Equipment, Owned

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No definition available.

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Namespace Prefix:	rio_
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Balance Type:	debit
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