v2.4.0.6
Recent Accounting Pronouncements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Dec. 31, 2012
Previous Accounting Guidance [Member]
     
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Policy acquisition costs deferred $ 117.9 $ 374.7  
Deferred policy acquisition cost, amortization expense 117.7 358.0  
Accounting Standards Update 2010-26 [Member]
     
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Costs expected to be recognized in income, effect of adoption     43
Policy acquisition costs deferred 89.4 289.3  
Deferred policy acquisition cost, amortization expense $ 96.5 $ 316.8