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SUBSEQUENT EVENTS (Details) - Subsequent Event - USD ($)
Apr. 01, 2019
Apr. 03, 2019
Senior Notes | Senior Notes Due 2019 Axis Specialty Finance PLC 2014    
Subsequent Event [Line Items]    
Maturities of senior debt $ 250,000,000  
Debt instrument, interest rate, stated percentage 2.65%  
Senior Notes | Senior Notes Due 2045 Axis Specialty Finance PLC 2014    
Subsequent Event [Line Items]    
Debt instrument, interest rate, stated percentage   5.15%
Debt instrument, face amount   $ 250,000,000
AXIS Specialty Finance PLC    
Subsequent Event [Line Items]    
Ownership percentage by parent 100.00%