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Reinsurance (Tables) | 9 Months Ended
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Sep. 30, 2024
Reinsurance Disclosures [Abstract] |
schedule of reinsurance recoverable on ceded insurance |
|  | September 30, 2024 |  | December 31, 2023
(in millions of U.S. dollars) | Net Reinsurance Recoverable (1) |  | Valuation allowance |  | Net Reinsurance Recoverable (1) |  | Valuation allowance
Reinsurance recoverable on unpaid losses and loss expenses | $ | 17,631 |  |  | $ | 307 |  |  | $ | 17,884 |  |  | $ | 285 |
Reinsurance recoverable on paid losses and loss expenses | 1,975 |  |  | 81 |  |  | 2,068 |  |  | 82 |
Reinsurance recoverable on losses and loss expenses | $ | 19,606 |  |  | $ | 388 |  |  | $ | 19,952 |  |  | $ | 367 |
Reinsurance recoverable on policy benefits | $ | 292 |  |  | $ | — |  |  | $ | 280 |  |  | $ | — |
(1)Net of valuation allowance for uncollectible reinsurance.
Reinsurance Recoverable, Allowance for Credit Loss [Table Text Block] | The following table presents a roll-forward of valuation allowance for uncollectible reinsurance related to Reinsurance recoverable on losses and loss expenses:
| Nine Months Ended
| September 30
(in millions of U.S. dollars) | 2024 |  | 2023
Valuation allowance for uncollectible reinsurance - beginning of period | $ | 367 |  |  | $ | 351 |
Provision for uncollectible reinsurance | 24 |  |  | 27 |
Write-offs charged against the valuation allowance | (4) |  |  | (8) |
Foreign exchange revaluation | 1 |  |  | — |
Valuation allowance for uncollectible reinsurance - end of period | $ | 388 |  |  | $ | 370 |

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- Definition Tabular disclosure of allowance for credit loss on reinsurance recoverable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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