Reinsurance Reinsurance (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Reinsurance [Abstract]
Gross Fee Income Earned Premium and Other Life	$ 769	$ 913	$ 1,573	$ 1,908
Assumed Premiums Earned, Life	32	34	35	35
Ceded Premiums Earned, Life	(405)	(175)	(814)	(349)
Net Fee Income Earned Premium and Other Life	$ 396	$ 772	$ 794	$ 1,594