XML 125 R99.htm IDEA: XBRL DOCUMENT
v3.25.0.1

RESERVE FOR LOSSES AND LOSS EXPENSES - Reconciliation of Development Tables to Consolidated Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | $ 10,565,875 |  |  |
Reinsurance recoverable on unpaid claims | 6,840,897 | $ 6,323,083 | $ 5,831,172 | $ 5,017,611
Gross outstanding liabilities | 17,406,772 |  |  |
Unallocated claims adjustment expenses | 212,623 |  |  |
Foreign exchange and other | (10,992) |  |  |
Ceded reserves related to retroactive transactions | (389,474) |  |  |
Reserve for losses and loss expenses | 17,218,929 | $ 16,434,018 | $ 15,168,863 | $ 14,653,094
Insurance |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 5,738,936 |  |  |
Reinsurance recoverable on unpaid claims | 4,796,155 |  |  |
Gross outstanding liabilities | 10,535,091 |  |  |
Insurance | Property |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 810,674 |  |  |
Reinsurance recoverable on unpaid claims | 476,362 |  |  |
Gross outstanding liabilities | 1,287,036 |  |  |
Insurance | Accident and health |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 134,285 |  |  |
Reinsurance recoverable on unpaid claims | 9,565 |  |  |
Gross outstanding liabilities | 143,850 |  |  |
Insurance | Marine and aviation |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 795,884 |  |  |
Reinsurance recoverable on unpaid claims | 348,062 |  |  |
Gross outstanding liabilities | 1,143,946 |  |  |
Insurance | Cyber |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 370,549 |  |  |
Reinsurance recoverable on unpaid claims | 455,301 |  |  |
Gross outstanding liabilities | 825,850 |  |  |
Insurance | Professional lines |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 2,034,530 |  |  |
Reinsurance recoverable on unpaid claims | 1,365,043 |  |  |
Gross outstanding liabilities | 3,399,573 |  |  |
Insurance | Credit and political risk |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 184,012 |  |  |
Reinsurance recoverable on unpaid claims | 35,302 |  |  |
Gross outstanding liabilities | 219,314 |  |  |
Insurance | Liability |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 1,409,002 |  |  |
Reinsurance recoverable on unpaid claims | 2,106,520 |  |  |
Gross outstanding liabilities | 3,515,522 |  |  |
Reinsurance |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 4,826,939 |  |  |
Reinsurance recoverable on unpaid claims | 2,044,742 |  |  |
Gross outstanding liabilities | 6,871,681 |  |  |
Reinsurance | Accident and health |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 187,670 |  |  |
Reinsurance recoverable on unpaid claims | 61,724 |  |  |
Gross outstanding liabilities | 249,394 |  |  |
Reinsurance | Marine and aviation |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 149,344 |  |  |
Reinsurance recoverable on unpaid claims | 26,273 |  |  |
Gross outstanding liabilities | 175,617 |  |  |
Reinsurance | Professional lines |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 943,175 |  |  |
Reinsurance recoverable on unpaid claims | 440,572 |  |  |
Gross outstanding liabilities | 1,383,747 |  |  |
Reinsurance | Liability |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 1,611,231 |  |  |
Reinsurance recoverable on unpaid claims | 813,796 |  |  |
Gross outstanding liabilities | 2,425,027 |  |  |
Reinsurance | Agriculture |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 177,971 |  |  |
Reinsurance recoverable on unpaid claims | 10,917 |  |  |
Gross outstanding liabilities | 188,888 |  |  |
Reinsurance | Credit and surety |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 306,042 |  |  |
Reinsurance recoverable on unpaid claims | 132,474 |  |  |
Gross outstanding liabilities | 438,516 |  |  |
Reinsurance | Motor |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 934,447 |  |  |
Reinsurance recoverable on unpaid claims | 352,438 |  |  |
Gross outstanding liabilities | 1,286,885 |  |  |
Reinsurance | Run-off lines |  |  |  |
Claims Development [Line Items] |  |  |  |
Net outstanding liabilities | 517,059 |  |  |
Reinsurance recoverable on unpaid claims | 206,548 |  |  |
Gross outstanding liabilities | $ 723,607 |  |  |

X
- Definition Undiscounted amount, before reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References No definition available. + Details
Name: | axs_ShortDurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseGross
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4E Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4D Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4B Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4B + Details
Name: | us-gaap_ClaimsDevelopmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(13)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after valuation allowance, recoverable under reinsurance contracts for losses reported to the ceding insurer but not yet paid and amounts expected for incurred losses and settlement expenses, which have not yet been reported to the ceding insurer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4C Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 310 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477363/944-310-50-2 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479838/944-20-50-5 Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477409/944-310-45-6 + Details
Name: | us-gaap_ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4B + Details
Name: | us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of reconciling item for the reconciliation of the liability in the disclosure of claims development (in excess of) less than the liability for unpaid claims and claims adjustment expense for short-duration insurance contracts, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4C + Details
Name: | us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimAdjustmentExpenseOtherReconcilingItem
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of accumulated increase (decrease) to the liability for unpaid claims and claim adjustment expenses used for claim development from a foreign exchange rate (gain) loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4C + Details
Name: | us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedForeignExchange
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability for unallocated claim adjustment expense for short-duration insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 9E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-9E Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-4C + Details
Name: | us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=axs_InsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_PropertyLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_AccidentAndHealthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_MarineAndAviationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_CyberLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProfessionalLiabilityInsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_CreditAndPoliticalRiskLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_LiabilityLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=axs_ReinsuranceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_AgricultureLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_CreditandSuretyBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=axs_MotorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=axs_RunOffLinesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |