XML 81 R67.htm IDEA: XBRL DOCUMENT v3.6.0.2
Reserve For Losses And Loss Expenses (Claims Development - Reinsurance) (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Claims Development [Line Items]              
Other reserves not included in the loss development triangles $ 43.6            
Liability for losses and loss expenses, net of reinsurance 4,900.4            
Reinsurance | Property              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 1,021.3            
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 777.5            
Other reserves not included in the loss development triangles 1.9            
Liability for losses and loss expenses, net of reinsurance 245.7            
Reinsurance | Property | 2016              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 180.4            
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 52.8            
Total IBNR 74.4            
Reinsurance | Property | 2015              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 174.4 $ 202.1          
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 104.2 53.9          
Total IBNR 26.3            
Reinsurance | Property | 2014              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 152.8 165.0 $ 196.5        
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 131.0 112.8 57.5        
Total IBNR 5.2            
Reinsurance | Property | 2013              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 123.1 133.6 143.7 $ 176.3      
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 115.7 110.6 84.8 29.7      
Total IBNR 2.9            
Reinsurance | Property | 2012              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 124.5 126.9 131.2 143.0 $ 190.9    
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 114.6 111.7 105.8 87.8 38.5    
Total IBNR 3.1            
Reinsurance | Property | 2011              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 199.2 197.8 199.4 207.2 223.9 $ 219.8  
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 193.9 190.5 182.1 162.9 116.6 53.4  
Total IBNR 1.2            
Reinsurance | Property | 2010              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 67.0 67.9 68.0 68.6 73.0 78.7 $ 80.3
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 65.2 64.8 63.2 57.6 50.2 38.2 11.1
Total IBNR 0.6            
Reinsurance | Casualty              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 1,292.3            
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 487.9            
Other reserves not included in the loss development triangles 225.9            
Liability for losses and loss expenses, net of reinsurance 1,030.3            
Reinsurance | Casualty | 2016              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 130.2            
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 1.8            
Total IBNR 120.5            
Reinsurance | Casualty | 2015              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 157.5 159.2          
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 14.5 1.5          
Total IBNR 123.6            
Reinsurance | Casualty | 2014              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 182.0 179.5 167.2        
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 31.0 12.5 1.7        
Total IBNR 120.0            
Reinsurance | Casualty | 2013              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 214.9 198.6 192.5 177.4      
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 81.4 60.2 22.4 7.8      
Total IBNR 92.8            
Reinsurance | Casualty | 2012              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 231.2 223.8 216.9 214.7 190.5    
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 127.5 92.5 57.3 39.2 12.6    
Total IBNR 68.9            
Reinsurance | Casualty | 2011              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 180.5 185.6 192.7 189.4 184.6 165.2  
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 105.0 93.2 71.3 49.0 26.9 8.4  
Total IBNR 51.8            
Reinsurance | Casualty | 2010              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 196.0 197.9 213.2 223.2 225.9 222.1 200.0
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 126.8 114.5 97.9 76.3 58.6 32.2 2.6
Total IBNR 48.4            
Reinsurance | Specialty and other              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 632.8            
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 460.4            
Other reserves not included in the loss development triangles 3.3            
Liability for losses and loss expenses, net of reinsurance 175.7            
Reinsurance | Specialty and other | 2016              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 118.4            
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 9.8            
Total IBNR 101.6            
Reinsurance | Specialty and other | 2015              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 128.0 130.0          
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 95.3 7.2          
Total IBNR 23.9            
Reinsurance | Specialty and other | 2014              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 118.4 124.8 121.0        
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 107.7 102.8 14.8        
Total IBNR 6.2            
Reinsurance | Specialty and other | 2013              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 102.0 100.3 106.7 111.6      
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 93.3 92.0 75.7 3.3      
Total IBNR 4.2            
Reinsurance | Specialty and other | 2012              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 136.5 137.2 138.3 132.0 123.1    
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 127.9 125.5 121.8 108.0 24.5    
Total IBNR 4.5            
Reinsurance | Specialty and other | 2011              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 21.4 22.1 22.7 21.9 26.9 30.0  
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 19.0 18.4 17.5 16.3 12.7 3.2  
Total IBNR 1.5            
Reinsurance | Specialty and other | 2010              
Claims Development [Line Items]              
Incurred Claims and Loss Adjustment Expenses, Net of Reinsurance 8.1 8.3 8.6 8.8 9.0 7.7 11.3
Cumulative Paid Claims and Loss Adjustment Expenses, Net of Reinsurance 7.3 $ 7.1 $ 7.0 $ 6.5 $ 6.1 $ 4.1 $ 2.1
Total IBNR $ 0.4