XML 87 R56.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

SEGMENT INFORMATION - Gross premiums written (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Gross premiums written | $ 6,898,858 | $ 6,910,065 | $ 5,556,273
Bermuda |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Gross premiums written | 738,258 | 606,452 | 529,425
Ireland |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Gross premiums written | 1,679,646 | 1,805,882 | 1,569,956
U.S. |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Gross premiums written | 3,090,547 | 2,811,537 | 2,814,933
Lloyd's of London |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Gross premiums written | $ 1,390,407 | $ 1,686,194 | $ 641,959

X
- Definition Amount of direct and assumed premiums written. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
Name: | us-gaap_PremiumsWrittenGross
Namespace Prefix: | us-gaap_
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_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_BM
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_IE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=axs_CountriesOtherThanBermudaIrelandAndUSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |