13. Fair Value of Financial Instruments (Details 5) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Embedded Derivative (EIA VED) [Member]
Fair Value, Balance	$ 48.7
Valuation Techniques	Budget method
Unobservable Input	Swap curve
Range	0.24% - 2.32%
Embedded derivatives (EIA VED) [Member]
Fair Value, Balance	48.7
Valuation Techniques	Budget method
Unobservable Input	Mortality rate
Range	75% of A2000 basic table
EmbeddedDerivativeFinancialInstrumentsThreeMember
Fair Value, Balance	48.7
Valuation Techniques	Budget method
Unobservable Input	Lapse rate
Range	1.00% - 35.00%
EmbeddedDerivativeFinancialInstrumentsFourMember
Fair Value, Balance	48.7
Valuation Techniques	Budget method
Unobservable Input	CSA
Range	4.75%
Embedded derivatives (GMAB / GMWB) [Member]
Fair Value, Balance	35.7
Valuation Techniques	Risk neutral stochastic valuation methodology
Unobservable Input	Volatility surface
Range	11.75% - 48.97%
EmbeddedDerivativeFinancialInstrumentsSixMember
Fair Value, Balance	35.7
Valuation Techniques	Risk neutral stochastic valuation methodology
Unobservable Input	Swap curve
Range	0.24% - 2.98%
EmbeddedDerivativeFinancialInstrumentsSevenMember
Fair Value, Balance	35.7
Valuation Techniques	Risk neutral stochastic valuation methodology
Unobservable Input	Mortality rate
Range	75% of A2000 basic table
EmbeddedDerivativeFinancialInstrumentsEightMember
Fair Value, Balance	35.7
Valuation Techniques	Risk neutral stochastic valuation methodology
Unobservable Input	Lapse rate
Range	0.00% - 60.00%
EmbeddedDerivativeFinancialInstrumentsNineMember
Fair Value, Balance	$ 35.7
Valuation Techniques	Risk neutral stochastic valuation methodology
Unobservable Input	CSA
Range	4.75%