XML 108 R84.htm IDEA: XBRL DOCUMENT
v3.10.0.1

DERIVATIVE INSTRUMENTS - Balance sheet classification of derivatives recorded at fair value (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Asset derivative fair value | $ 8,237 | $ 5,125
Liability derivative fair value | 14,522 | 14,386
Not Designated as Hedging Instruments | Other assets |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Asset derivative fair value | 8,237 | 5,125
Not Designated as Hedging Instruments | Other liabilities |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Liability derivative fair value | 14,522 | 14,386
Not Designated as Hedging Instruments | Investment Portfolio | Foreign exchange forward contracts |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Derivative notional amount | 79,336 | 137,422
Not Designated as Hedging Instruments | Investment Portfolio | Foreign exchange forward contracts | Other assets |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Asset derivative fair value | 262 | 10
Not Designated as Hedging Instruments | Investment Portfolio | Foreign exchange forward contracts | Other liabilities |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Liability derivative fair value | 531 | 619
Not Designated as Hedging Instruments | Investment Portfolio | Interest rate swaps |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Derivative notional amount | 150,000 | 191,000
Not Designated as Hedging Instruments | Investment Portfolio | Interest rate swaps | Other assets |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Asset derivative fair value | 0 | 448
Not Designated as Hedging Instruments | Investment Portfolio | Interest rate swaps | Other liabilities |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Liability derivative fair value | 1,116 | 1,556
Not Designated as Hedging Instruments | Underwriting Portfolio | Foreign exchange forward contracts |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Derivative notional amount | 737,419 | 698,959
Not Designated as Hedging Instruments | Underwriting Portfolio | Foreign exchange forward contracts | Other assets |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Asset derivative fair value | 7,975 | 4,667
Not Designated as Hedging Instruments | Underwriting Portfolio | Foreign exchange forward contracts | Other liabilities |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Liability derivative fair value | 2,576 | 701
Not Designated as Hedging Instruments | Underwriting Portfolio | Derivatives - Other underwriting-related derivatives |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Derivative notional amount | 85,000 | 85,000
Not Designated as Hedging Instruments | Underwriting Portfolio | Derivatives - Other underwriting-related derivatives | Other assets |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Asset derivative fair value | 0 | 0
Not Designated as Hedging Instruments | Underwriting Portfolio | Derivatives - Other underwriting-related derivatives | Other liabilities |  |
Derivative Fair Values on Consolidated Balance Sheet [Line Items] |  |
Liability derivative fair value | $ 10,299 | $ 11,510

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
Name: | us-gaap_DerivativeAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
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 No definition available. + Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | axs_RelatedPortfolioAxis=axs_InvestmentPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | axs_RelatedPortfolioAxis=axs_UnderwritingPortfolioMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=axs_OtherUnderwritingRelatedDerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |