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INVESTMENTS (DETAILS 9) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Value of reverse repurchase agreements	$ 123us-gaap_SecuritiesForReverseRepurchaseAgreements	$ 110us-gaap_SecuritiesForReverseRepurchaseAgreements
Minimum required collateral for reverse repurchase agreements, expressed as a percentage of loan principal	102.00%axs_SecuritiesPurchasedUnderAgreementsToResellRequiredCollateralPercentageOfPrincipal

X

- Definition

Minimum value of securities received as collateral against securities purchased under agreement to resell, expressed as a percentage of loan principal.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

X

- Details

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X

- Definition

The carrying value of securities purchased to be resold in reverse repurchase transactions as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(m)(2)(i))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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