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Closed Block (Details 3) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Change in maximum future earnings of the Closed Block      
Maximum future earnings to be recognized from Closed Block assets and liabilities, Beginning of year $ 723.8 $ 787.0 $ 847.6
Maximum future earnings to be recognized from Closed Block assets and liabilities, End of year 685.3 723.8 787.0
Closed Block revenues, net of Closed Block expenses, income taxes and funding adjustment charges $ (38.5) $ (63.2) $ (60.6)