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Insurance and reinsurance contracts - Effect of insurance contracts initially recognised (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Insurance |  |
Effect of insurance contracts initially recognised |  |
Onerous contracts initially recognised | $ 7 | $ 7
New contracts in the year | 7 | 7
Insurance | Insurance acquisition cash flows |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 4,493 | 4,365
Onerous contracts initially recognised | 95 | 101
New contracts in the year | 4,588 | 4,466
Insurance | Claims and other directly attributable expenses |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 19,655 | 17,125
Onerous contracts initially recognised | 592 | 348
New contracts in the year | 20,247 | 17,473
Insurance | Estimate of present value of expected future cash outflows |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 24,148 | 21,490
Onerous contracts initially recognised | 687 | 449
New contracts in the year | 24,835 | 21,939
Insurance | Estimate of present value of expected future cash inflows |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | (26,861) | (23,916)
Onerous contracts initially recognised | (683) | (484)
New contracts in the year | (27,544) | (24,400)
Insurance | Risk adjustment for non-financial risk (RA) |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 312 | 253
Onerous contracts initially recognised | 3 | 42
New contracts in the year | 315 | 295
Insurance | Contractual service margin (CSM) |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 2,401 | 2,173
New contracts in the year | 2,401 | 2,173
RI |  |
Effect of insurance contracts initially recognised |  |
Onerous contracts initially recognised | (1) |
New contracts in the year | (1) |
RI | Estimate of present value of expected future cash outflows |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 2,329 | 1,022
Onerous contracts initially recognised |  | (1)
New contracts in the year | 2,329 | 1,021
RI | Estimate of present value of expected future cash inflows |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | (2,338) | (946)
Onerous contracts initially recognised | (1) |
New contracts in the year | (2,339) | (946)
RI | Risk adjustment for non-financial risk (RA) |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | (5) | (5)
New contracts in the year | (5) | (5)
RI | Contractual service margin (CSM) |  |
Effect of insurance contracts initially recognised |  |
Non-onerous contracts initially recognised | 14 | (71)
Onerous contracts initially recognised |  | 1
New contracts in the year | $ 14 | $ (70)

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- Definition The increase (decrease) in insurance contracts liability (asset) resulting from the effects of contracts initially recognised in the period. [Refer: Insurance contracts liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 107 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_107&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 104 -Subparagraph a -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_104_a_iii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in insurance contracts liability (asset) resulting from the effects of groups of onerous contracts initially recognised in the period. An insurance contract is onerous at the date of initial recognition if the fulfilment cash flows allocated to the contract, any previously recognised acquisition cash flows and any cash flows arising from the contract at the date of initial recognition in total are a net outflow. [Refer: Insurance contracts liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 17 -IssueDate 2024-01-01 -Paragraph 108 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_108_b&doctype=Standard -URIDate 2024-03-27 + Details
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