XML 130 R115.htm IDEA: XBRL DOCUMENT v3.6.0.2
Statutory Requirements (Narrative) (Details) - USD ($)
$ in Millions
9 Months Ended 10 Months Ended 12 Months Ended
Oct. 01, 2016
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2017
Statutory Accounting Practices [Line Items]          
Retained earnings available for payment of dividends or distribution to shareholders       $ 1,400.0  
Decrease in statutory capital requirement $ 500.0        
Assets held in trust   $ 2,500.0 $ 2,500.0 $ 2,700.0  
Renaissance Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Dividends and return of capital     245.0    
RenaissanceRe Specialty Risks Ltd.          
Statutory Accounting Practices [Line Items]          
Dividends and return of capital   680.0      
Bermuda          
Statutory Accounting Practices [Line Items]          
Early warning level threshold, percent of risk-based capital model of BMA       120.00%  
Bermuda | Renaissance Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Unrecorded liabilities, exempt by regulatory authority   390.4 390.4    
U.S.          
Statutory Accounting Practices [Line Items]          
Retained earnings available for payment of dividends or distribution to shareholders       $ 26.0  
U.S. | Scenario, Forecast          
Statutory Accounting Practices [Line Items]          
Retained earnings available for payment of dividends or distribution to shareholders         $ 25.4
New York | Multi-Beneficiary Reinsurance Trust | Renaissance Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Assets held in trust   505.0 505.0 673.2  
New York | Multi-Beneficiary Reinsurance Trust | Renaissance Reinsurance Ltd. | Minimum          
Statutory Accounting Practices [Line Items]          
Assets held in trust   378.8 378.8 608.3  
New York | Multi-Beneficiary Reinsurance Trust | DaVinci Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Assets held in trust   135.3 135.3 136.7  
New York | Multi-Beneficiary Reinsurance Trust | DaVinci Reinsurance Ltd. | Minimum          
Statutory Accounting Practices [Line Items]          
Assets held in trust   100.1 100.1 90.4  
New York | Multi-Beneficiary Reduced Collateral Reinsurance Trust | Renaissance Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Assets held in trust   41.7 41.7 39.5  
New York | Multi-Beneficiary Reduced Collateral Reinsurance Trust | Renaissance Reinsurance Ltd. | Minimum          
Statutory Accounting Practices [Line Items]          
Assets held in trust   15.2 15.2 14.9  
New York | Multi-Beneficiary Reduced Collateral Reinsurance Trust | DaVinci Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Assets held in trust   18.9 18.9 19.1  
New York | Multi-Beneficiary Reduced Collateral Reinsurance Trust | DaVinci Reinsurance Ltd. | Minimum          
Statutory Accounting Practices [Line Items]          
Assets held in trust   $ 10.4 $ 10.4 $ 14.1  
FLORIDA | Multi-Beneficiary Reduced Collateral Reinsurance Trust | Renaissance Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Multi-beneficiary reduced collateral reinsurance trust collateral reduction       20.00%  
FLORIDA | Multi-Beneficiary Reduced Collateral Reinsurance Trust | DaVinci Reinsurance Ltd.          
Statutory Accounting Practices [Line Items]          
Multi-beneficiary reduced collateral reinsurance trust collateral reduction       50.00%