Fair Value Measurements (Details Textual 1) (USD $)	3 Months Ended					3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 Derivative Liabilities [Member]	Dec. 31, 2013 Derivative Liabilities [Member]	Jun. 30, 2014 US Treasury Securities [Member]	Jun. 30, 2013 US Treasury Securities [Member]	Jun. 30, 2014 US Treasury Securities [Member]	Jun. 30, 2013 US Treasury Securities [Member]	Jun. 30, 2014 Policyholder Behavior Assumptions [Member]
Fair Value Measurements - Financial Instruments Excluding Guaranteed Living Benefits (Textual) [Abstract]
Fair Value, Assets Level One To Level Two Transfers, Amount						$ 309,000,000	$ 350,000,000	$ 1,600,000,000	$ 466,000,000
Transfer of amount from level 2 to 1	0
Cash collateral liability				203,000,000	128,000,000
Investment sales receivable	2,800,000,000		2,400,000,000
Derivatives priced by valuation models	97.00%		97.00%
Credit standing adjustment	(1,000,000)		(1,000,000)
Gain (loss) on derivative, net	(107,000,000)	(111,000,000)								0
Behavior Risk Margin	$ 90,000,000		$ 108,000,000