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Reinsurance (Tables) | 9 Months Ended
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Sep. 30, 2021
Reinsurance Disclosures [Abstract] |
schedule of reinsurance recoverable on ceded insurance |
|  | September 30, 2021 |  | December 31, 2020
(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 | $ | 15,550 |  |  | $ | 269 |  |  | $ | 14,647 |  |  | $ | 257 |
Reinsurance recoverable on paid losses and loss expenses | 1,098 |  |  | 56 |  |  | 945 |  |  | 57 |
Reinsurance recoverable on losses and loss expenses | $ | 16,648 |  |  | $ | 325 |  |  | $ | 15,592 |  |  | $ | 314 |
Reinsurance recoverable on policy benefits | $ | 206 |  |  | $ | 4 |  |  | $ | 206 |  |  | $ | 5 |
(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 loss and loss expenses:
| Nine Months Ended
| September 30
(in millions of U.S. dollars) | 2021 |  | 2020
Valuation allowance for uncollectible reinsurance - beginning of period | $ | 314 |  |  | $ | 316 |
Provision for uncollectible reinsurance | 16 |  |  | 21 |
Write-offs charged against the valuation allowance | (4) |  |  | (19) |
Foreign exchange revaluation | (1) |  |  | 2 |
Valuation allowance for uncollectible reinsurance - end of period | $ | 325 |  |  | $ | 320 |

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- Definition schedule of reinsurance recoverable on ceded insurance + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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