XML 90 R66.htm IDEA: XBRL DOCUMENT
v3.10.0.1

INVESTMENTS - Amortized cost or cost and fair values (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Fixed maturities |  |
Amortized cost | $ 11,616,312 | $ 12,611,219
Gross unrealized gains | 33,874 | 101,660
Gross unrealized losses | (214,839) | (90,873)
Fair value | 11,435,347 | 12,622,006
Non-credit OTTI in AOCI | (857) | (853)
U.S. government and agency |  |
Fixed maturities |  |
Amortized cost | 1,520,142 | 1,727,643
Gross unrealized gains | 4,232 | 1,735
Gross unrealized losses | (8,677) | (16,909)
Fair value | 1,515,697 | 1,712,469
Non-credit OTTI in AOCI | 0 | 0
Non-U.S. government |  |
Fixed maturities |  |
Amortized cost | 507,550 | 798,582
Gross unrealized gains | 1,586 | 17,240
Gross unrealized losses | (16,120) | (9,523)
Fair value | 493,016 | 806,299
Non-credit OTTI in AOCI | 0 | 0
Corporate debt |  |
Fixed maturities |  |
Amortized cost | 4,990,279 | 5,265,795
Gross unrealized gains | 15,086 | 61,922
Gross unrealized losses | (128,444) | (29,851)
Fair value | 4,876,921 | 5,297,866
Non-credit OTTI in AOCI | 0 | 0
Agency RMBS |  |
Fixed maturities |  |
Amortized cost | 1,666,684 | 2,414,720
Gross unrealized gains | 6,508 | 8,132
Gross unrealized losses | (29,884) | (27,700)
Fair value | 1,643,308 | 2,395,152
Non-credit OTTI in AOCI | 0 | 0
CMBS |  |
Fixed maturities |  |
Amortized cost | 1,103,507 | 776,715
Gross unrealized gains | 2,818 | 4,138
Gross unrealized losses | (13,795) | (3,125)
Fair value | 1,092,530 | 777,728
Non-credit OTTI in AOCI | 0 | 0
Non-Agency RMBS |  |
Fixed maturities |  |
Amortized cost | 40,732 | 45,713
Gross unrealized gains | 1,237 | 1,917
Gross unrealized losses | (1,282) | (799)
Fair value | 40,687 | 46,831
Non-credit OTTI in AOCI | (857) | (853)
ABS |  |
Fixed maturities |  |
Amortized cost | 1,651,350 | 1,432,884
Gross unrealized gains | 1,493 | 5,391
Gross unrealized losses | (15,240) | (1,994)
Fair value | 1,637,603 | 1,436,281
Non-credit OTTI in AOCI | 0 | 0
Municipals |  |
Fixed maturities |  |
Amortized cost | 136,068 | 149,167
Gross unrealized gains | 914 | 1,185
Gross unrealized losses | (1,397) | (972)
Fair value | 135,585 | 149,380
Non-credit OTTI in AOCI | $ 0 | $ 0

X
- Definition Accumulated other comprehensive loss related to portion of other than temporary impairment (OTTI) due to factors other than credit losses on debt securities categorized as available-for-sale that an entity does not intend to sell and which it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis of the debt security. + References No definition available. + Details
Name: | axs_AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossAvailableForSaleDebtSecurities
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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: |