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Changes in accounting policies - Impact on equity attributable to owners due to amendments (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Jan. 01, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
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Other Disclosures [Line Items] |  |  |  |  |  |  |  |
Equity attributable to owners of Rio Tinto | $ 51,625 |  | $ 50,634 | [1] |  | $ 51,930 |  | $ 47,570
Opening Balance |  |  |  |  |  |  |  |
Other Disclosures [Line Items] |  |  |  |  |  |  |  |
Equity attributable to owners of Rio Tinto |  | $ 50,175 |  |  | $ 51,415 |  | $ 47,054 |
Impact of IAS 12 amendments |  |  |  |  |  |  |  |
Other Disclosures [Line Items] |  |  |  |  |  |  |  |
Equity attributable to owners of Rio Tinto |  |  | $ 459 |  |  | $ 515 |  | $ 516
[1] | Comparative information has been restated to reflect the adoption of narrow scope amendments to IAS12 'Income Taxes', refer to note 2 for details.

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