Closed Block (Revenues and Expenses) (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
Revenues
Premiums	$ 478	$ 512	$ 1,431	$ 1,538
Net investment income	514	555	1,576	1,644
Net investment gains (losses)	(7)	6	20	30
Net derivative gains (losses)	(16)	(9)	(1)	(7)
Total revenues	969	1,064	3,026	3,205
Expenses
Policyholder benefits and claims	651	654	1,963	2,016
Policyholder dividends	251	278	740	821
Other expenses	39	45	124	136
Total expenses	941	977	2,827	2,973
Revenues, net of expenses before provision for income tax expense (benefit)	28	87	199	232
Provision for income tax expense (benefit)	10	30	70	82
Revenues, net of expenses and provision for income tax expense (benefit) from continuing operations	18	57	129	150
Revenues, net of expenses and provision for income tax expense (benefit) from discontinued operations	0	0	0	4
Revenues, net of expenses and provision for income tax expense (benefit)	$ 18	$ 57	$ 129	$ 154