Investments in subsidiary undertakings, joint ventures and associates - Equity method and fair value through profit or loss (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Investments in subsidiary undertakings, joint ventures and associates
Fair value of associates accounted for at fair value through profit or loss where there are published price quotations	$ 600	$ 500
Share of profit from joint ventures and associates, net of related tax	477	(91)	$ (85)
Other comprehensive income in the joint ventures and associates	0
Unrecognised share of losses of a joint venture	0
Unrecognised share of losses of a associate	0
Contingent liabilities in relation to interests in joint ventures	0
Contingent liabilities in relation to interests in associates	0
Capital commitments in relation to interests in joint ventures	0
Capital commitments in relation to interests in associates	0
Shareholder-backed \| Operating segments
Investments in subsidiary undertakings, joint ventures and associates
Share of profit from joint ventures and associates, net of related tax	477	(91)	(85)
Shareholder-backed \| Operating segments \| Mainland China
Investments in subsidiary undertakings, joint ventures and associates
Share of profit from joint ventures and associates, net of related tax	159	(577)	(345)
Shareholder-backed \| Operating segments \| Malaysia
Investments in subsidiary undertakings, joint ventures and associates
Share of profit from joint ventures and associates, net of related tax	21	18	16
Shareholder-backed \| Operating segments \| Growth markets and other
Investments in subsidiary undertakings, joint ventures and associates
Share of profit from joint ventures and associates, net of related tax	104	310	100
Taxes included in share of profit from joint ventures and associates	(44)	191	72
Shareholder-backed \| Operating segments \| Insurance operations
Investments in subsidiary undertakings, joint ventures and associates
Share of profit from joint ventures and associates, net of related tax	284	(249)	(229)
Shareholder-backed \| Operating segments \| Eastspring
Investments in subsidiary undertakings, joint ventures and associates
Share of profit from joint ventures and associates, net of related tax	$ 193	$ 158	$ 144

The commitments that the entity has relating to its joint ventures as specified in paragraphs B18-B20 of IFRS 12. [Refer: Total for all joint ventures [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph 23
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_23_a&doctype=Standard
-URIDate 2024-03-27

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The amount of contingent liabilities incurred in relation to interests in joint ventures. [Refer: Classes of contingent liabilities [domain]; Total for all joint ventures [member]]

+ References

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The amount of contingent liabilities incurred relating to the entity's interests in associates. [Refer: Total for all associates [member]; Classes of contingent liabilities [domain]]

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The fair value of investments in associates if there are quoted market prices for the investment. [Refer: Total for all associates [member]; Investments in associates reported in separate financial statements]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2024-01-01
-Paragraph 21
-Subparagraph b
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_21_b_iii&doctype=Standard
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The entity's share of the other comprehensive income of associates and joint ventures accounted for using the equity method, net of tax. [Refer: Total for all associates [member]; Investments accounted for using equity method; Total for all joint ventures [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2024-01-01
-Paragraph B16
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2024-en-r&anchor=para_B16_c&doctype=Appendix&subtype=B
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The entity's share of the profit (loss) from continuing operations of associates and joint ventures accounted for using the equity method. [Refer: Total for all associates [member]; Continuing operations, unless line item indicates otherwise [member]; Investments accounted for using equity method; Total for all joint ventures [member]; Profit (loss) from continuing operations]

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The amount of the unrecognised share of associates' losses if the entity has stopped recognising its share of losses when applying the equity method. [Refer: Total for all associates [member]]

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The amount of the unrecognised share of joint ventures' losses if the entity has stopped recognising its share of losses when applying the equity method. [Refer: Total for all joint ventures [member]]

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Capital commitments in relation to interests in associates

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

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Taxes included in share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method

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