Name:	axs_AlternativeInvestmentsFairValueDisclosurePercentageOfTotal
Namespace Prefix:	axs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The fair value of the entity's investments in hedge and credit funds which are not currently accepting redemption requests.

No definition available.

Name:	axs_AlternativeInvestmentsFairValueRedemptionRequestsNotAccepted
Namespace Prefix:	axs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The percentage of the entity's total investment in hedge and credit funds not currently accepting redemption requests which relates to a leveraged bank loan fund in a period of planned principal distribution with a target completion date within the following financial year.

No definition available.

Name:	axs_AlternativeInvestmentsFairValueRedemptionRequestsNotAcceptedpercentagerelatedToFundScheduledToDistributePrincipalWithinFollowingFinancialYear
Namespace Prefix:	axs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

States the notice requirement (for example, 30 to 60 days) the entity is required to deliver before it can redeem its investment, or portion thereof, for each of those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments), by major category.

No definition available.

Name:	axs_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionNoticePeriodDays
Namespace Prefix:	axs_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The total fair value of investments that cannot be redeemed because of a lockup restriction (i.e. the initial period of time an investor is required to hold the security before obtaining the ability to redeem) as of the statement of financial position date.

No definition available.

Name:	axs_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLockupRestriction
Namespace Prefix:	axs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The percentage of the total value of investments that cannot be redeemed because of a lockup restriction (i.e. the initial period of time an investor is required to hold the security before obtaining the ability to redeem) as of the statement of financial position date.

No definition available.

Name:	axs_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLockupRestrictionPercentage
Namespace Prefix:	axs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

This element represents the total fair market value of investments in certain entities that calculate net asset value per share (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements, but may also be used in both the balance sheet and disclosure in the same submission. This item represents alternative investments as of the balance sheet date which may include investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds, and any other investment in which investee management calculates net asset value per share as the primary metric for investment value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph a

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph a

-URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Subparagraph (a)

-Paragraph 6A

-URI http://asc.fasb.org/extlink&oid=6925170&loc=SL6742756-110258