Fair Value Measurements (Details Textual 1) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Fair Value Measurements - Financial Instruments Excluding Guaranteed Living Benefits (Textual) [Abstract]
Transfer of amount from level 2 to 1	$ 0
Investment sales receivable	1,500,000,000		2,400,000,000
Derivatives priced by valuation models	98.00%		97.00%
Credit standing adjustment	(2,000,000)		(1,000,000)
Gain (loss) on derivative, net	(80,000,000)	(432,000,000)
Behavior Risk Margin	101,000,000		108,000,000
Derivative Liabilities [Member]
Fair Value Measurements - Financial Instruments Excluding Guaranteed Living Benefits (Textual) [Abstract]
Cash collateral liability	114,000,000		128,000,000
US Treasury Securities [Member]
Fair Value Measurements - Financial Instruments Excluding Guaranteed Living Benefits (Textual) [Abstract]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	1,300,000,000	115,000,000
Policyholder Behavior Assumptions [Member]
Fair Value Measurements - Financial Instruments Excluding Guaranteed Living Benefits (Textual) [Abstract]
Gain (loss) on derivative, net	$ 0	$ 1,000,000