XML 83 R62.htm IDEA: XBRL DOCUMENT
v3.22.4

INVESTMENTS - Summary of Fixed Maturities and Equities in an Unrealized Loss Position (Details) $ in Thousands | Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
--- | --- | ---
Fixed maturities |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 3,615,234 | $ 390,141
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 6,269,478 | 6,197,689
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 9,884,712 | 6,587,830
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (497,762) | (17,715)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (358,826) | (76,531)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | $ (856,588) | $ (94,246)
Number of positions in an unrealized loss | security | 4,525 | 2,333
Continuous unrealized loss position | security | 1,842 | 344
Fixed maturities | Below Investment Grade or Not Rated |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | $ (64,000) | $ (8,000)
U.S. government and agency |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 467,032 | 101,776
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 1,414,181 | 2,014,880
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 1,881,213 | 2,116,656
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (41,365) | (4,852)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (56,424) | (15,795)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (97,789) | (20,647)
Non-U.S. government |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 207,637 | 11,011
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 298,048 | 463,498
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 505,685 | 474,509
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (33,027) | (1,830)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (19,885) | (7,855)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (52,912) | (9,685)
Corporate debt |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 1,562,355 | 152,962
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 2,350,504 | 1,681,859
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 3,912,859 | 1,834,821
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (268,289) | (6,542)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (150,701) | (31,570)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (418,990) | (38,112)
Agency RMBS |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 220,595 | 41,024
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 771,191 | 503,988
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 991,786 | 545,012
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (40,469) | (1,678)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (58,832) | (7,103)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (99,301) | (8,781)
CMBS |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 343,494 | 30,128
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 599,877 | 347,515
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 943,371 | 377,643
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (40,888) | (1,001)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (41,257) | (3,686)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (82,145) | (4,687)
Non-agency RMBS |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 75,137 | 4,481
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 53,484 | 109,937
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 128,621 | 114,418
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (14,691) | (523)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (3,834) | (1,500)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (18,525) | (2,023)
ABS |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 685,990 | 43,466
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 686,190 | 1,040,363
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 1,372,180 | 1,083,829
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (48,913) | (1,152)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (21,808) | (8,513)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | (70,721) | (9,665)
Municipals |  |
Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | 52,994 | 5,293
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | 96,003 | 35,649
Debt Securities, Available-for-Sale, Unrealized Loss Position, Total | 148,997 | 40,942
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (10,120) | (137)
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (6,085) | (509)
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | $ (16,205) | $ (646)

X
- Definition Debt Securities, Available-For-Sale, Unrealized Loss Position, Fair Value + References No definition available. + Details
Name: | axs_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueAbstract
Namespace Prefix: | axs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=us-gaap_ExternalCreditRatingNonInvestmentGradeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesSecuritizedLoansAndReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |