Fair Value Measurements Significant Unobservable Inputs (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Actuarial Assumptions, Lapses, threshold percentage	85.00%	85.00%
Actuarial Assumptions, Policyholder Deposits, threshold percentage	85.00%	85.00%
Fixed indexed annuities (FIA) | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Interest rate implied volatility	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits	0.00%	0.00%
Fixed indexed annuities (FIA) | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Interest rate implied volatility	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits	0.00%	0.00%
Fixed indexed annuities (FIA) | Investment Contract | Market Approach Valuation Technique | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Nonperformance risk	(0.10%)	0.10%
Actuarial Assumptions, Lapses	0.00%	0.00%
Fixed indexed annuities (FIA) | Investment Contract | Market Approach Valuation Technique | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Nonperformance risk	0.79%	1.30%
Actuarial Assumptions, Lapses	10.00%	10.00%
Stabilizer / MCG
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Percentage of Plans	100.00%	100.00%
Stabilizer / MCG | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Interest rate implied volatility	0.20%	0.10%
Nonperformance risk	(0.10%)	0.10%
Actuarial Assumptions, Lapses	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits	0.00%	0.00%
Actuarial Assumptions, Lapses under percent threshold	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits under percent threshold	0.00%	0.00%
Stabilizer / MCG | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Interest rate implied volatility	8.00%	7.60%
Nonperformance risk	0.79%	1.30%
Actuarial Assumptions, Lapses	55.00%	55.00%
Actuarial Assumptions, Policyholder Deposits	60.00%	60.00%
Actuarial Assumptions, Lapses under percent threshold	25.00%	25.00%
Actuarial Assumptions, Policyholder Deposits under percent threshold	30.00%	30.00%
Stabilizer (Investment Only) and MCG Contracts
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Percentage of Plans	88.00%	87.00%
Stabilizer (Investment Only) and MCG Contracts | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Actuarial Assumptions, Lapses	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits	0.00%	0.00%
Actuarial Assumptions, Lapses under percent threshold	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits under percent threshold	0.00%	0.00%
Stabilizer (Investment Only) and MCG Contracts | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Actuarial Assumptions, Lapses	30.00%	30.00%
Actuarial Assumptions, Policyholder Deposits	55.00%	55.00%
Actuarial Assumptions, Lapses under percent threshold	15.00%	15.00%
Actuarial Assumptions, Policyholder Deposits under percent threshold	20.00%	20.00%
Stabilizer with Recordkeeping Agreements
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Percentage of Plans	12.00%	13.00%
Stabilizer with Recordkeeping Agreements | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Actuarial Assumptions, Lapses	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits	0.00%	0.00%
Actuarial Assumptions, Lapses under percent threshold	0.00%	0.00%
Actuarial Assumptions, Policyholder Deposits under percent threshold	0.00%	0.00%
Stabilizer with Recordkeeping Agreements | Derivative Financial Instruments, Liabilities | Market Approach Valuation Technique | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Actuarial Assumptions, Lapses	55.00%	55.00%
Actuarial Assumptions, Policyholder Deposits	60.00%	60.00%
Actuarial Assumptions, Lapses under percent threshold	25.00%	25.00%
Actuarial Assumptions, Policyholder Deposits under percent threshold	30.00%	30.00%