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SHAREHOLDERS' EQUITY (DETAILS 4) (Dividend Adjustment [Member], Common Stock [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Dividend Adjustment [Member] | Common Stock [Member] |
Out of period adjustment amount [Line Items] |
Out of period adjustment amount | $ 31 us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsAmount / us-gaap_QuantifyingMisstatementInCurrentYearFinancialStatementsByNatureOfErrorAxis = axs_DividendadjustmentMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember

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- Definition Amount of each individual error being corrected in the correcting adjustment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 1.N.Q3) -URI http://asc.fasb.org/extlink&oid=26874127&loc=d3e30840-122693 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 1 -Section N + Details
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- Details
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