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Deferred Policy Acquisition Costs and Deferred Sales Inducements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Deferred Policy Acquisition Costs [Line Items]      
Deferred policy acquisition costs, unlocking adjustment $ (18.5) $ 3.7 $ (9.1)
Deferred sales inducements, unlocking adjustment $ (11.1) $ (0.2) $ (5.0)