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Summary Of Accounting Policies And Accounting Changes (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accounting Policy Disclosures [Line Items]                      
Interest rate assumption, minimum                 3.00%    
Interest rate assumption, maximum                 7.00%    
Write-off of long-lived asset $ 0.0 $ 0.0 $ 11.1 $ 0.0 $ 0.0 $ 54.6 $ 0.0 $ 0.0 $ 11.1 $ 54.6 $ 0.0
Charge for goodwill impairment included in insurance expenses                   1.4  
Amortization expense                 9.0    
Life Insurance Product Line [Member]                      
Accounting Policy Disclosures [Line Items]                      
Present value of the future profits embedded in life insurance in force 32.5       36.5       32.5 36.5  
Expected Amortization Expense of Ending Present Value of Future Insurance Profits, Net of Interest Accrued [Abstract]                      
2016                 3.4    
2017                 3.2    
2018                 2.8    
2019                 2.4    
2020                 2.0    
Property and Casualty Insurance [Member]                      
Accounting Policy Disclosures [Line Items]                      
Present value of the future profits embedded in life insurance in force 11.2       $ 13.3       11.2 $ 13.3  
Broker Relationships [Member]                      
Accounting Policy Disclosures [Line Items]                      
Assets acquired $ 18.1               $ 18.1    
Useful life of intangibles acquired                 15 years