Goodwill (Changes in Goodwill by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 953		$ 953		$ 953
Accumulated impairment	(460)		(460)		(394)
Total goodwill, net	493		493		559
Impairments	(66)	(394)	(66)	(394)
Retail [Member]
Goodwill [Line Items]
Goodwill	241		241		241
Accumulated impairment	(241)		(241)		(218)
Total goodwill, net	0		0		23
Impairments			(23)
Corporate Benefit Funding [Member]
Goodwill [Line Items]
Goodwill	307		307		307
Accumulated impairment	0		0		0
Total goodwill, net	307		307		307
Impairments			0
Corporate & Other [Member]
Goodwill [Line Items]
Goodwill	405		405		405
Accumulated impairment	(219)		(219)		(176)
Total goodwill, net	186		186		229
Impairments			$ (43)