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Share capital - Rio Tinto Limited - Additional information (Detail) - – Rio Tinto Limited - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of classes of share capital [line items] |  |  |
Value of shares purchased by employee share ownership trusts | $ 44 | $ 78 | $ 84
Number of shares held (in shares) | 303,327 | 794,282 | 979,495

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- Definition The number of shares in the entity held by the entity or by its subsidiaries or associates. [Refer: Total for all associates [member]; Total for all subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 79 -Subparagraph a -Clause vi -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_79_a_vi&doctype=Standard -URIDate 2024-03-27 + Details
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