v2.4.0.6

DERIVATIVE INSTRUMENTS (DETAILS 4) (USD $) In Millions, unless otherwise specified | Dec. 31, 2009
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DERIVATIVE INSTRUMENTS [Abstract] |
Face value of asset back note collateralized by a portfolio of life settlement contracts | $ 400
Term (in years) of asset back note collateralized by a portfolio of life settlement contracts | 10

X
- Definition Face value of an insured asset-backed note collateralized by a portfolio of life settlement contracts and cash. + References No definition available. + Details
Name: | axs_InsuredAssetBackedSecurityCollateralizedByLifeSettlementContractsFaceValue
Namespace Prefix: | axs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term (in years) of an insured asset-backed note collateralized by a portfolio of life settlement contracts and cash. + References No definition available. + Details
Name: | axs_InsuredAssetBackedSecurityCollateralizedByLifeSettlementContractsTerm
Namespace Prefix: | axs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration