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Investment in Associates and joint ventures - Summary of Investments in Associates (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Beginning balance | $ 36 |  |  |  |
Share of profits/(losses) | (31) | $ 59 | [1] | $ 8 | [1]
Ending balance | 48 | 36 |  |  |
Investments accounted for using equity method | 48 | 36 | [2] |  |
Cost [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Beginning balance | 89 | 132 |  |  |
Additions | 3 | 1 |  |  |
Share of profits/(losses) | 13 | (41) |  |  |
System Fund share of losses | (3) | (1) |  |  |
Dividends and distributions | (1) | (1) |  |  |
Exchange and other adjustments |  | (1) |  |  |
Ending balance | 101 | 89 |  | 132 |
Accumulated impairment [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Beginning balance | (53) | (55) |  |  |
Impairment reversal |  | 2 |  |  |
Ending balance | (53) | (53) |  | $ (55) |
Joint ventures [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Investments accounted for using equity method | 2 |  |  |  |
Barclay associate [member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Investments accounted for using equity method | 3 |  |  |  |
Other associates [Member] |  |  |  |  |
Disclosure of associates and joint ventures [line items] |  |  |  |  |
Investments accounted for using equity method | $ 43 | $ 36 |  |  |
[1] | Re-presented for the adoption of IFRS 17 ‘Insurance Contracts’ and to combine System Fund revenues and reimbursables (see New accounting standards and other presentational changes).
[2] | Re-presented for the adoption of IFRS 17 ‘Insurance Contracts’ (see New accounting standards and other presentational changes).

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- Definition The amount of dividends received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph B12 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_B12_a&doctype=Appendix&subtype=B -URIDate 2023-03-23 + Details
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- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 24 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_24_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph B16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_e&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries reported in separate financial statements] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2023-01-01 -Paragraph 10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=27&code=ifrs-tx-2023-en-r&anchor=para_10&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 28 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_28_e&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2023-01-01 -Paragraph 23 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2023-en-r&anchor=para_23_g&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 82 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_82_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Additions to associates and joint ventures. + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information about associate and joint ventures associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition Increase through reversal of impairment charges related to associates and joint ventures. + References No definition available. + Details
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