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Non-controlling interests material to the Group - Reallocation of net asset value (Details) - USD ($) $ in Millions |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 25, 2022 | Jan. 25, 2022 | Jun. 30, 2022 | Jun. 30, 2021
Disclosure of classes of share capital [line items] |  |  |  |
Change in equity interest held by Rio Tinto |  |  | $ 0 | $ 0
Equity issued to holders of non-controlling interests |  |  | 22 | 28
Retained earnings |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Change in equity interest held by Rio Tinto | $ (490) | $ 6 | (484) | 37
Equity issued to holders of non-controlling interests | (711) |  | (711) |
Non-controlling interests |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Change in equity interest held by Rio Tinto | 490 | $ (6) | 484 | (37)
Equity issued to holders of non-controlling interests | $ 711 |  | 733 | $ 28
Non-controlling interests | Subsidiaries other than Turquoise Hill |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Equity issued to holders of non-controlling interests |  |  | $ 22 |

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- Definition The increase (decrease) in equity through changes in ownership interests in subsidiaries that do not result in loss of control. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 106 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_106_d_iii&doctype=Standard -URIDate 2021-03-24 + Details
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