XML 68 R57.htm IDEA: XBRL DOCUMENT v3.10.0.1
Reinsurance (Schedule of Trust Assets and Reinsurance Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Dec. 31, 2016
Reinsurance [Line Items]        
Restricted cash and cash equivalents $ 338.0 $ 255.6 $ 313.9 $ 224.7
Restricted securities available for sale [1] 54.4 46.1    
Accounts payable and accrued liabilities 172.5 151.7    
Trust Assets [Member]        
Reinsurance [Line Items]        
Restricted cash and cash equivalents 0.4 0.8    
Restricted securities available for sale 54.4 46.1    
Unearned Premium [Member]        
Reinsurance [Line Items]        
Accounts payable and accrued liabilities 42.5 34.1    
Claims Reserve [Member]        
Reinsurance [Line Items]        
Accounts payable and accrued liabilities [2] $ 1.7 $ 1.0    
[1] Measured and recorded at fair value on a recurring basis.
[2] The claims reserve represents our liability for incurred-but-not-reported claims and is estimated based on historical claims experience.