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.

No definition available.

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- Definition

The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2021-01-01
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2021-01-01
-Paragraph 16
-Subparagraph b
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-URIDate 2021-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-Subparagraph a
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-URIDate 2021-03-24

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- Definition

The proportion of the voting rights in a joint venture held by the entity. [Refer: Joint ventures [member]]

+ References

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- Definition

The number of shares in the entity held by the entity or by its subsidiaries or associates. [Refer: Associates [member]; Subsidiaries [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 79
-Subparagraph a
-Clause vi
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_79_a_vi&doctype=Standard
-URIDate 2021-03-24

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Principal joint ventures - Summary of joint ventures (Detail) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure of joint ventures [line items]
Number of shares held (in shares)	0	0	0
Minera Escondida Ltda
Disclosure of joint ventures [line items]
Group interest (%)	30.00%	30.00%
Minera Escondida Ltda \| BHP Billiton
Disclosure of joint ventures [line items]
Group interest (%)	57.50%
Sohar Aluminium Co. L.L.C.
Disclosure of joint ventures [line items]
Group interest (%)	20.00%	20.00%
Sohar Aluminium Co. L.L.C. \| Ordinary
Disclosure of joint ventures [line items]
Number of shares held (in shares)	37,500
Proportion of class held (%)	20.00%
Group interest (%)	20.00%