Principal subsidiaries - Additional Information (Details) - Amended and restated shareholders agreement - Erdenes Oyu Tolgoi LLC $ in Billions	Jan. 25, 2022 USD ($)
Disclosure of subsidiaries [line items]
Loan amount waived off	$ 2.4
Accrued interest	$ 1.0

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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