Interest in associates and joint ventures - Carrying amount of interests in associates and joint ventures (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Interests In Other Entities [Abstract]
Interests in associates	$ 28,777	$ 27,200
Interests in joint ventures	132	144
Interests in associates and joint ventures	$ 28,909	$ 27,344	$ 29,254

Interests In Other Entities [Abstract]

No definition available.

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- Definition

The amount of investments in associates in an entity's separate financial statements. [Refer: Total for all associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2024-01-01
-Paragraph 10
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2024-en-r&anchor=para_10&doctype=Standard
-URIDate 2024-03-27

+ Details

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- Definition

The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Total for all joint ventures [member]]

+ References

+ Details

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- Definition

The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Total for all associates [member]; Total for all joint ventures [member]; Total for all subsidiaries [member]; Investments in subsidiaries reported in separate financial statements]

+ References

+ Details

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