XML 64 R53.htm IDEA: XBRL DOCUMENT
v3.7.0.1

RESERVE FOR LOSSES AND LOSS EXPENSES (Details 2) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 13, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Mar. 20, 2017 | Mar. 19, 2017
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Current year |  |  |  | $ 1,308,000 | $ 1,279,369 |  |
Foreign exchange and other |  |  |  | (242,973) | 106,629 |  |
Net favorable (adverse) prior year reserve development |  | $ 70,933 | $ 77,719 | 95,727 | 148,113 |  |
Short Tail Lines Insurance And Reinsurance Business [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Net favorable (adverse) prior year reserve development |  | 31,000 | 27,000 | 35,000 | 75,000 |  |
Professional Lines Insurance And Reinsurance Business [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Net favorable (adverse) prior year reserve development |  | 22,000 | 15,000 | 46,000 | 16,000 |  |
Liability Reinsurance Business [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Net favorable (adverse) prior year reserve development |  | $ 16,000 | 15,000 | 39,000 | 22,000 |  |
Liability Insurance Business [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Net favorable (adverse) prior year reserve development |  |  |  | (7,000) |  |  |
Motor Reinsurance Business [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Net favorable (adverse) prior year reserve development |  |  | $ 17,000 | (20,000) | 33,000 |  |
Ogden rate |  |  |  |  |  | (0.75%) | 2.50%
Catastrophe and Weather-related Events [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Current year |  |  |  | $ 85,000 | $ 124,000 |  |
Discontinued Operations, Disposed of by Means Other than Sale [Member] |  |  |  |  |  |  |
Additional Information Related to Net Incurred Losses [Line Items] |  |  |  |  |  |  |
Liability for unpaid claims and claims adjustment Eexpense | $ (223,000) |  |  |  |  |  |
Reduction in reinsurance recoverables on unpaid and paid loses by | $ 223,000 |  |  |  |  |  |

X
- Definition Disposal Group, Not Discontinued Operation, Reduction In Reinsurance Recoverables, Unpaid And Paid Losses + References No definition available. + Details
Name: | axs_DisposalGroupNotDiscontinuedOperationReductionInReinsuranceRecoverablesUnpaidAndPaidLosses
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The effect of exchange rate changes on foreign-denominated balances 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. The balance may include other non-material items. + References No definition available. + Details
Name: | axs_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignExchangeAndOther
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Amount, after effects of reinsurance, of increase (decrease) in the liability for unpaid claims and claims adjustment expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 + Details
Name: | us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpensePeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The discount rate used to reduce the estimated amount of loss reserves on short-duration contracts to present value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65670685&loc=d3e14881-158438 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.N.Q1) -URI http://asc.fasb.org/extlink&oid=27015749&loc=d3e569934-122904 + Details
Name: | us-gaap_ShortDurationContractsDiscountedLiabilitiesDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, after effects of reinsurance, of expense for claims incurred in the current reporting period and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 + Details
Name: | us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65670824&loc=d3e14764-158437 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 + Details
Name: | us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_NoncatastrophicEventAxis=axs_ShortTailReservingClassInsuranceAndReinsuranceBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NoncatastrophicEventAxis=axs_ProfessionalLinesInsuranceAndReinsuranceBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NoncatastrophicEventAxis=axs_LiabilityReinsuranceBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NoncatastrophicEventAxis=axs_LiabilityInsuranceBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NoncatastrophicEventAxis=axs_MotorReinsuranceBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LiabilityForCatastropheClaimsByCatastrophicEventAxis=us-gaap_CatastropheMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfByMeansOtherThanSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |