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10. Fair Value of Financial Instruments (Details 7) (Level 3 [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Policy Loans [Member]
   
Carrying Amounts and Fair Values of Financial Instruments:    
Carrying Value of Financial instruments $ 61.0  
Fair Value of Financial instruments 60.6  
Policy Loans [Member] | As restated and amended [Member]
   
Carrying Amounts and Fair Values of Financial Instruments:    
Carrying Value of Financial instruments   62.5
Fair Value of Financial instruments   62.1
Investment Contracts [Member]
   
Carrying Amounts and Fair Values of Financial Instruments:    
Carrying Value of Financial instruments 2,349.8  
Fair Value of Financial instruments 2,355.4  
Investment Contracts [Member] | As restated and amended [Member]
   
Carrying Amounts and Fair Values of Financial Instruments:    
Carrying Value of Financial instruments   1,724.4
Fair Value of Financial instruments   1,732.2
Cash and cash equivalent [Member] | As restated and amended [Member]
   
Carrying Amounts and Fair Values of Financial Instruments:    
Carrying Value of Financial instruments 83.1 49.5
Fair Value of Financial instruments $ 83.1 $ 49.5