Fair Value Measurements (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Withdrawal Utilization [Member] Level 3 [Member]	Jun. 30, 2014 Withdrawal Utilization [Member] Level 3 [Member] Maximum [Member]	Jun. 30, 2014 Withdrawal Utilization [Member] Level 3 [Member] Minimum [Member]	Jun. 30, 2014 Withdrawal Rates [Member] Level 3 [Member]	Jun. 30, 2014 Withdrawal Rates [Member] Level 3 [Member] Maximum [Member]	Jun. 30, 2014 Withdrawal Rates [Member] Level 3 [Member] Minimum [Member]	Jun. 30, 2014 Lapse Rates [Member] Level 3 [Member]	Jun. 30, 2014 Lapse Rates [Member] Level 3 [Member] Maximum [Member]	Jun. 30, 2014 Lapse Rates [Member] Level 3 [Member] Minimum [Member]	Jun. 30, 2014 Reset Elections [Member] Level 3 [Member]	Jun. 30, 2014 Reset Elections [Member] Level 3 [Member] Maximum [Member]	Jun. 30, 2014 Reset Elections [Member] Level 3 [Member] Minimum [Member]	Jun. 30, 2014 Equity Volatility [Member] Level 3 [Member]	Jun. 30, 2014 Equity Volatility [Member] Level 3 [Member] Maximum [Member]	Jun. 30, 2014 Equity Volatility [Member] Level 3 [Member] Minimum [Member]	Jun. 30, 2014 Policyholder Behavior Assumptions [Member]	Jun. 30, 2014 Monthly N.A.V Calulation [Member] Alternative Assets [Member] Limited Partnerships and Other Alternative Investments [Member] Level 3 [Member]	Dec. 31, 2013 Monthly N.A.V Calulation [Member] Alternative Assets [Member] Limited Partnerships and Other Alternative Investments [Member] Level 3 [Member]
Fair value Measurement Significant Unobservable Input [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value Based on Inputs																			$ 0	$ 108,000,000
Fair Value Inputs [Abstract]
Range of Values-Unobservable Inputs				100.00%	20.00%		8.00%	0.00%		75.00%	0.00%		75.00%	20.00%		50.00%	10.00%
Positive or negative relationship of change in input to change in fair value measurement			Increase			Increase			Decrease			Increase			Increase
Pre-tax realized gains	$ (107,000,000)	$ (111,000,000)																$ 0