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Reserves for unpaid losses and loss adjustment expenses - Claim Development (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Other property                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance $ 1,719.7                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 1,273.1                  
All outstanding liabilities before 2009, net of reinsurance 4.2                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 450.8                  
Other property | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 93.1 $ 92.8 $ 94.6 $ 95.8 $ 93.1 $ 94.1 $ 94.2 $ 98.3 $ 108.7 $ 118.3
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 90.1 90.9 90.9 90.2 90.5 89.4 85.4 78.7 59.5 22.6
Other property | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 136.9 137.2 138.8 139.5 140.4 145.3 144.7 153.4 156.1  
Total IBNR liabilities plus expected development on reported claims 1.4                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 130.7 130.9 130.8 130.3 128.2 123.3 115.6 88.7 31.2  
Other property | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 131.6 132.8 132.5 131.8 133.7 141.7 150.9 163.5    
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 127.1 127.4 124.7 122.3 116.2 103.3 79.5 26.9    
Other property | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 133.6 133.7 135.7 140.4 144.8 150.0 163.4      
Total IBNR liabilities plus expected development on reported claims 1.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 126.0 125.1 119.8 116.5 108.2 85.4 20.1      
Other property | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 112.2 112.7 113.0 116.6 127.4 131.2        
Total IBNR liabilities plus expected development on reported claims (0.2)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 106.6 106.0 102.7 96.3 72.0 27.5        
Other property | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 113.0 115.3 115.1 117.6 115.0          
Total IBNR liabilities plus expected development on reported claims 1.0                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 106.7 104.5 96.2 69.4 19.0          
Other property | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 135.5 135.6 133.3 141.2            
Total IBNR liabilities plus expected development on reported claims 0.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 124.9 115.2 93.7 31.0            
Other property | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 219.8 215.2 196.2              
Total IBNR liabilities plus expected development on reported claims 0.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 181.8 128.9 31.5              
Other property | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 370.9 334.2                
Total IBNR liabilities plus expected development on reported claims 46.5                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 223.5 58.8                
Other property | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 273.1                  
Total IBNR liabilities plus expected development on reported claims 97.4                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 55.7                  
Property Catastrophe Excess                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 808.4                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 565.1                  
All outstanding liabilities before 2009, net of reinsurance 2.4                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 245.7                  
Property Catastrophe Excess | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 44.9 44.9 44.9 44.8 45.1 45.9 46.7 47.7 49.0 48.2
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 44.2 44.2 44.2 44.1 44.0 43.7 42.7 39.8 31.4 7.4
Property Catastrophe Excess | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 121.3 120.7 121.4 121.9 122.8 130.2 131.0 133.6 136.1  
Total IBNR liabilities plus expected development on reported claims (0.2)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 118.0 117.5 117.5 113.6 111.1 107.6 102.5 90.0 49.8  
Property Catastrophe Excess | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 116.6 116.6 116.6 117.4 121.0 142.7 153.2 148.6    
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 116.5 116.4 115.4 115.0 114.7 95.6 54.1 15.7    
Property Catastrophe Excess | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 46.5 46.3 51.1 50.6 52.6 59.2 70.8      
Total IBNR liabilities plus expected development on reported claims 0.5                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 44.5 43.3 41.5 40.5 35.8 26.2 2.8      
Property Catastrophe Excess | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 73.6 73.9 74.7 75.3 78.2 71.6        
Total IBNR liabilities plus expected development on reported claims 0.0                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 69.6 68.4 67.1 62.1 49.4 11.1        
Property Catastrophe Excess | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 54.8 54.9 54.9 57.7 56.2          
Total IBNR liabilities plus expected development on reported claims 0.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 49.5 47.9 42.3 36.1 9.4          
Property Catastrophe Excess | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 26.2 27.2 29.6 27.6            
Total IBNR liabilities plus expected development on reported claims 0.0                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 20.2 16.9 9.5 1.8            
Property Catastrophe Excess | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 42.8 48.2 50.6              
Total IBNR liabilities plus expected development on reported claims 1.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 31.9 25.7 10.4              
Property Catastrophe Excess | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 124.4 106.3                
Total IBNR liabilities plus expected development on reported claims 20.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 67.9 13.3                
Property Catastrophe Excess | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 157.3                  
Total IBNR liabilities plus expected development on reported claims 60.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 2.8                  
Agriculture                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 235.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 194.5                  
All outstanding liabilities before 2009, net of reinsurance 0.1                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 40.9                  
Agriculture | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 8.6 8.6 8.6 8.6 8.6 8.5 8.7 8.7 10.0 11.9
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 8.4 8.4 8.4 8.4 8.4 8.4 8.6 8.6 9.0 2.2
Agriculture | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 10.7 10.7 10.7 10.7 10.7 10.7 10.9 10.8 12.8  
Total IBNR liabilities plus expected development on reported claims (0.3)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 10.7 10.7 10.7 10.7 10.6 10.6 10.8 10.7 0.5  
Agriculture | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 21.7 21.7 21.7 21.7 21.7 21.7 21.6 21.5    
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 21.6 21.6 21.6 21.6 21.6 21.6 21.3 1.0    
Agriculture | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 46.9 46.9 46.9 45.7 45.8 45.8 41.0      
Total IBNR liabilities plus expected development on reported claims (0.3)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 46.9 46.9 46.9 45.6 45.7 45.4 19.0      
Agriculture | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 12.8 12.8 13.0 12.9 10.8 9.1        
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 12.8 12.8 13.0 12.8 10.6 7.1        
Agriculture | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 8.8 8.8 8.4 8.1 9.6          
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 8.9 8.8 8.8 8.1 6.5          
Agriculture | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 9.5 9.5 9.2 7.0            
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 9.3 9.0 7.8 1.5            
Agriculture | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 29.9 30.8 33.5              
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 29.6 28.1 10.1              
Agriculture | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 47.0 50.5                
Total IBNR liabilities plus expected development on reported claims 2.5                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 43.7 9.2                
Agriculture | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 39.4                  
Total IBNR liabilities plus expected development on reported claims 33.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 2.6                  
Global Accident & Health                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 1,467.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 1,322.9                  
All outstanding liabilities before 2009, net of reinsurance 3.5                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 148.2                  
Global Accident & Health | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 79.0 79.0 79.0 78.9 79.0 78.9 79.2 81.3 84.3 86.6
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 78.8 78.8 78.8 78.7 78.6 78.5 77.7 76.1 67.7 27.7
Global Accident & Health | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 121.6 121.7 121.8 121.8 121.8 122.1 122.9 125.4 118.4  
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 121.9 121.9 121.9 121.8 121.7 121.4 119.2 102.2 53.1  
Global Accident & Health | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 171.4 171.5 171.6 171.7 171.7 172.3 176.7 161.3    
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 171.6 171.6 171.6 171.5 171.1 166.1 139.2 71.2    
Global Accident & Health | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 146.6 146.7 146.8 147.1 147.8 160.1 163.4      
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 146.6 146.6 146.6 146.4 146.0 136.0 72.1      
Global Accident & Health | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 116.8 117.6 118.2 118.7 123.2 125.6        
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 116.2 116.7 115.5 114.1 103.6 54.4        
Global Accident & Health | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 129.6 130.6 130.6 132.2 131.1          
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 126.6 126.6 124.8 111.3 59.3          
Global Accident & Health | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 144.8 146.1 149.5 153.5            
Total IBNR liabilities plus expected development on reported claims 0.7                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 143.4 141.8 130.3 75.7            
Global Accident & Health | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 186.7 190.9 176.7              
Total IBNR liabilities plus expected development on reported claims 5.0                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 143.7 131.9 97.7              
Global Accident & Health | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 168.3 176.4                
Total IBNR liabilities plus expected development on reported claims 13.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 146.0 95.7                
Global Accident & Health | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 202.8                  
Total IBNR liabilities plus expected development on reported claims 52.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 128.1                  
Aviation & Space                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 373.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 296.1                  
All outstanding liabilities before 2009, net of reinsurance 9.4                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 86.6                  
Aviation & Space | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 35.8 31.9 31.9 34.2 35.1 35.3 36.9 35.0 34.0 30.9
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 35.9 32.0 31.2 31.7 28.5 27.6 26.4 21.4 16.6 7.9
Aviation & Space | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 41.9 41.6 42.1 42.3 43.2 44.7 47.2 47.5 42.5  
Total IBNR liabilities plus expected development on reported claims (0.5)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 41.0 39.9 39.7 38.8 37.8 36.2 31.5 22.1 12.0  
Aviation & Space | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 35.1 35.8 34.5 34.7 35.9 37.9 42.3 46.9    
Total IBNR liabilities plus expected development on reported claims (0.2)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 34.7 34.8 34.1 32.7 31.5 28.6 22.7 10.2    
Aviation & Space | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 29.6 29.5 28.4 28.2 30.2 34.3 35.6      
Total IBNR liabilities plus expected development on reported claims (0.2)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 28.7 28.2 27.3 24.6 22.6 18.4 7.6      
Aviation & Space | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 33.0 32.9 32.0 33.4 36.4 40.6        
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 29.2 28.5 26.7 24.0 19.9 13.5        
Aviation & Space | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 34.3 34.2 35.0 38.2 35.7          
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 28.2 26.2 23.6 17.9 8.0          
Aviation & Space | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 39.0 40.0 35.9 39.5            
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 33.5 27.1 21.1 10.5            
Aviation & Space | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 33.6 32.6 32.1              
Total IBNR liabilities plus expected development on reported claims 1.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 26.9 19.7 7.8              
Aviation & Space | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 43.0 34.0                
Total IBNR liabilities plus expected development on reported claims 5.9                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 23.7 9.0                
Aviation & Space | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 48.0                  
Total IBNR liabilities plus expected development on reported claims 19.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 14.3                  
Trade credit                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 202.7                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 165.1                  
All outstanding liabilities before 2009, net of reinsurance 4.5                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 42.1                  
Trade credit | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 10.1 9.4 9.3 9.3 9.4 9.4 9.7 9.8 10.0 9.4
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 10.0 9.1 9.1 9.1 9.0 8.9 8.8 8.5 7.7 3.4
Trade credit | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 9.8 9.8 9.6 9.7 9.8 9.7 9.6 12.3 14.1  
Total IBNR liabilities plus expected development on reported claims (0.3)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 9.5 9.4 9.3 9.1 9.0 8.6 7.7 5.2 1.8  
Trade credit | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 26.3 26.5 26.5 27.1 27.1 27.4 29.0 29.2    
Total IBNR liabilities plus expected development on reported claims (0.2)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 25.8 25.7 26.0 25.7 24.8 23.5 17.5 6.5    
Trade credit | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 32.0 32.4 32.4 32.8 32.5 34.3 34.5      
Total IBNR liabilities plus expected development on reported claims (0.3)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 31.9 31.9 32.1 31.8 31.0 26.8 14.7      
Trade credit | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 27.4 27.9 27.3 27.5 28.4 29.5        
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 24.5 24.4 24.0 22.8 19.8 11.6        
Trade credit | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 21.1 21.4 23.5 22.7 22.8          
Total IBNR liabilities plus expected development on reported claims 0.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 19.7 19.2 17.7 13.7 7.8          
Trade credit | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 18.4 19.2 19.7 20.2            
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 16.6 15.7 12.2 4.5            
Trade credit | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 12.5 13.2 15.3              
Total IBNR liabilities plus expected development on reported claims 0.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 10.6 8.9 4.6              
Trade credit | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 20.1 19.2                
Total IBNR liabilities plus expected development on reported claims 6.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 8.8 3.0                
Trade credit | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 25.0                  
Total IBNR liabilities plus expected development on reported claims 13.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 7.7                  
Environmental                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.4                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 0.4                  
Environmental | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.4                  
Total IBNR liabilities plus expected development on reported claims 0.4                  
Marine                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 274.4                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 215.9                  
All outstanding liabilities before 2009, net of reinsurance 0.4                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 58.9                  
Marine | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 24.0 24.1 23.8 24.2 24.1 24.0 24.4 24.8 25.8 27.9
Total IBNR liabilities plus expected development on reported claims (0.1)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 23.2 23.1 23.0 22.8 22.6 21.7 19.8 17.5 12.5 3.6
Marine | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 31.1 31.3 31.6 32.9 33.3 32.4 32.7 35.1 32.3  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 28.7 28.5 27.5 26.7 21.3 19.5 17.1 12.2 5.0  
Marine | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 31.5 31.6 31.5 32.1 31.1 30.6 32.8 36.6    
Total IBNR liabilities plus expected development on reported claims (0.3)                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 29.6 29.1 28.7 27.9 25.1 21.6 14.3 4.3    
Marine | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 36.3 36.8 37.9 37.5 36.1 33.4 27.3      
Total IBNR liabilities plus expected development on reported claims 1.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 32.6 31.0 29.1 27.1 24.2 14.7 5.2      
Marine | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 18.0 18.1 18.3 19.3 20.5 23.3        
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 14.9 14.4 14.0 12.6 9.3 2.8        
Marine | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 17.9 18.2 19.5 21.6 23.3          
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 15.8 15.0 13.7 10.3 4.1          
Marine | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 28.8 29.2 31.5 29.5            
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 26.2 21.8 11.8 4.3            
Marine | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 28.4 29.2 28.3              
Total IBNR liabilities plus expected development on reported claims 1.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 21.4 17.5 6.8              
Marine | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 35.1 37.5                
Total IBNR liabilities plus expected development on reported claims 6.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 18.2 7.2                
Marine | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 23.3                  
Total IBNR liabilities plus expected development on reported claims 9.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 5.3                  
Surety                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 5.4                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 2.7                  
All outstanding liabilities before 2009, net of reinsurance 1.8                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 4.5                  
Surety | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.1 0.1 0.3 0.3 0.4 0.4 0.2 0.1 0.1  
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1    
Surety | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.4 0.4 0.6 0.6 0.5 0.3    
Total IBNR liabilities plus expected development on reported claims 0.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1    
Surety | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.3 0.3 0.4 0.4 0.6 0.6 0.5      
Total IBNR liabilities plus expected development on reported claims 0.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.2 0.2 0.1 0.1 0.1      
Surety | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.9 0.7 0.5 0.7 0.9 1.0        
Total IBNR liabilities plus expected development on reported claims 0.7                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.6 0.5 0.3 0.2 0.1 0.1        
Surety | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 1.3 1.1 1.0 1.1 1.2          
Total IBNR liabilities plus expected development on reported claims 1.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.9 0.7 0.4 0.2            
Surety | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.8 1.0 1.2 1.0            
Total IBNR liabilities plus expected development on reported claims 0.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.4 0.3 0.2 0.1            
Surety | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5                  
Total IBNR liabilities plus expected development on reported claims 0.4                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.3                  
Surety | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.4 0.6                
Total IBNR liabilities plus expected development on reported claims 0.3                  
Surety | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.9                  
Total IBNR liabilities plus expected development on reported claims 0.9                  
Contingency                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 79.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 66.0                  
All outstanding liabilities before 2009, net of reinsurance (0.1)                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 13.7                  
Contingency | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 6.3 6.4 6.3 6.3 6.2 6.2 6.2 6.3 6.4 6.9
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 6.4 6.3 6.2 6.2 6.2 6.1 6.1 6.1 5.9 4.9
Contingency | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 4.2 4.1 4.1 4.1 4.3 4.4 4.5 6.0 5.6  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 4.1 4.1 4.1 4.1 3.9 3.5 3.5 3.4 1.9  
Contingency | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 6.6 6.6 6.6 6.5 6.5 6.6 7.1 7.8    
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 6.5 6.5 6.5 6.4 6.4 6.4 5.7 2.1    
Contingency | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 8.0 8.0 8.2 8.4 8.6 8.5 9.5      
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 8.0 8.0 8.2 8.4 8.4 7.1 5.2      
Contingency | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 3.5 3.5 3.5 3.6 4.2 5.4        
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 3.3 3.3 3.3 3.2 3.0 1.8        
Contingency | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 4.7 4.7 5.2 7.0 4.2          
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 4.5 4.5 4.4 3.7 1.6          
Contingency | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 8.9 9.0 9.7 10.0            
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 7.8 7.8 7.2 2.8            
Contingency | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 17.4 18.4 18.0              
Total IBNR liabilities plus expected development on reported claims 0.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 16.4 15.6 12.1              
Contingency | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 10.7 9.8                
Total IBNR liabilities plus expected development on reported claims 1.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 7.1 3.0                
Contingency | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 9.5                  
Total IBNR liabilities plus expected development on reported claims 4.2                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 1.9                  
Casualty                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 66.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 4.9                  
All outstanding liabilities before 2009, net of reinsurance 4.0                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 65.4                  
Casualty | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1
Casualty | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5 0.6 0.6 0.9 1.1 1.4 1.6 1.5 1.7  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.4 0.4 0.3 0.4 0.2 0.1 0.1      
Casualty | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.2 0.3 0.3 0.4 0.4 0.5    
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.2 0.2 0.1 0.1        
Casualty | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5 0.5 0.5 0.5 0.4 0.2 0.2      
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.2 0.1 0.2 0.1          
Casualty | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5 0.5 0.4 0.4 0.4 0.4        
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.4 0.4 0.3 0.2 0.1 0.1        
Casualty | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5 0.5 0.5 0.4 0.4          
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.4 0.4 0.4 0.2 0.1          
Casualty | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5 0.6 0.8 0.5            
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.4 0.4 0.4 0.2            
Casualty | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.3 0.3 0.2              
Total IBNR liabilities plus expected development on reported claims 0.1                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.1 0.1                
Casualty | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 9.7 9.7                
Total IBNR liabilities plus expected development on reported claims 6.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.6                  
Casualty | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 53.4                  
Total IBNR liabilities plus expected development on reported claims 44.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 2.0                  
Runoff & Other                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 1,281.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 1,230.1                  
All outstanding liabilities before 2009, net of reinsurance 422.2                  
Liabilities for loss and allocated loss adjustment expenses, net of reinsurance 473.7                  
Runoff & Other | Accident Year, 2009                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 512.2 511.9 512.7 511.6 510.7 510.0 509.6 510.0 520.5 527.0
Total IBNR liabilities plus expected development on reported claims 7.9                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 499.6 498.9 496.5 495.1 492.1 488.3 483.8 480.3 402.5 $ 289.1
Runoff & Other | Accident Year, 2010                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 394.1 394.8 394.8 393.8 392.3 391.1 390.6 390.4 389.1  
Total IBNR liabilities plus expected development on reported claims 3.8                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 388.1 387.4 385.5 383.6 380.0 376.8 372.7 370.4 $ 225.7  
Runoff & Other | Accident Year, 2011                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 309.8 310.3 310.8 309.9 309.4 308.7 307.6 306.4    
Total IBNR liabilities plus expected development on reported claims 5.5                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 303.6 303.1 301.6 299.5 297.8 296.1 293.8 $ 291.8    
Runoff & Other | Accident Year, 2012                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 3.9 4.1 4.1 4.2 4.1 4.0 3.6      
Total IBNR liabilities plus expected development on reported claims 1.3                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 2.5 2.4 2.4 2.2 1.8 1.3 $ 0.3      
Runoff & Other | Accident Year, 2013                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.2 0.1 0.2 0.2 0.2 1.2        
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.1 0.1 0.1 0.1 0.1 $ 0.7        
Runoff & Other | Accident Year, 2014                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.5 0.4 0.3 0.2 $ 0.2          
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.3 0.2 0.1              
Runoff & Other | Accident Year, 2015                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 18.0 17.5 15.7 9.5            
Total IBNR liabilities plus expected development on reported claims 0.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 16.6 15.3 10.0 $ 5.2            
Runoff & Other | Accident Year, 2016                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 11.7 12.1 11.8              
Total IBNR liabilities plus expected development on reported claims 0.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 10.9 10.1 $ 6.2              
Runoff & Other | Accident Year, 2017                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 0.9 0.6                
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance 0.5 $ 0.4                
Runoff & Other | Accident Year, 2018                    
Reserves for unpaid losses and loss adjustment expenses                    
Incurred losses and allocated loss adjustment expenses, net of reinsurance 30.3                  
Total IBNR liabilities plus expected development on reported claims 6.6                  
Cumulative paid losses and allocated loss adjustment expenses, net of reinsurance $ 7.9