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Risk and sensitivity analysis - Sensitivity to insurance risk (Details) - Insurance risk - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Maintenance expenses |  |
Risk and sensitivity analysis |  |
Reasonably possible increase in assumption (as a percent) | 10.00% | 10.00%
Net effect on shareholders' equity, Gross of reinsurance from increase in assumption | $ (73) | $ (77)
Net effect on shareholders' equity, Net of reinsurance from increase in assumption | (72) | (71)
Net effect on profit after tax attributable to equity holders, Gross of reinsurance from increase in assumption | (73) | (77)
Net effect on profit after tax attributable to equity holders, net of reinsurance from increase in assumption | (72) | (71)
Net effect on CSM, Gross of reinsurance from increase in assumption | (422) | (420)
Net effect on CSM, Net of reinsurance from increase in assumption | (424) | (427)
Net effect on pre-tax adjusted operating profit from increase in assumption | $ (67) | $ (61)
Lapse rates |  |
Risk and sensitivity analysis |  |
Reasonably possible increase in assumption (as a percent) | 10.00% | 10.00%
Net effect on shareholders' equity, Gross of reinsurance from increase in assumption | $ (97) | $ (88)
Net effect on shareholders' equity, Net of reinsurance from increase in assumption | (72) | (76)
Net effect on profit after tax attributable to equity holders, Gross of reinsurance from increase in assumption | (97) | (88)
Net effect on profit after tax attributable to equity holders, net of reinsurance from increase in assumption | (72) | (76)
Net effect on CSM, Gross of reinsurance from increase in assumption | (1,435) | (1,363)
Net effect on CSM, Net of reinsurance from increase in assumption | (1,593) | (1,496)
Net effect on pre-tax adjusted operating profit from increase in assumption | $ (105) | $ (95)
Mortality and morbidity |  |
Risk and sensitivity analysis |  |
Reasonably possible increase in assumption (as a percent) | 5.00% | 5.00%
Net effect on shareholders' equity, Gross of reinsurance from increase in assumption | $ (110) | $ (131)
Net effect on shareholders' equity, Net of reinsurance from increase in assumption | (108) | (96)
Net effect on profit after tax attributable to equity holders, Gross of reinsurance from increase in assumption | (110) | (131)
Net effect on profit after tax attributable to equity holders, net of reinsurance from increase in assumption | (108) | (96)
Net effect on CSM, Gross of reinsurance from increase in assumption | (689) | (638)
Net effect on CSM, Net of reinsurance from increase in assumption | (269) | (261)
Net effect on pre-tax adjusted operating profit from increase in assumption | $ (97) | $ (85)

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- Definition The increase (decrease) in equity that would have been caused by a reasonably possible increase in the risk variable that arises from contracts within the scope of IFRS 17. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 128 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 128 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in equity, before mitigation by reinsurance contracts held, that would have been caused by a reasonably possible increase in the risk variable that arises from contracts within the scope of IFRS 17. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 128 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in profit (loss) that would have been caused by a reasonably possible increase in the risk variable that arises from contracts within the scope of IFRS 17. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 128 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a_i&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 128 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_128_a_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in contractual service margin, that would have been caused by a reasonably possible increase in the risk variable that arises from contracts within the scope of IFRS 17. + References No definition available. + Details
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