Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Insurance premiums	$ 674	$ 630	$ 1,328	$ 1,219
Insurance fees	983	885	1,941	1,788
Net investment income	1,213	1,197	2,363	2,362
Realized gain (loss):
Total other-than-temporary impairment losses on securities	(20)	(50)	(39)	(147)
Portion of loss recognized in other comprehensive income	1	17	6	67
Net other-than-temporary impairment losses on securities recognized in earnings	(19)	(33)	(33)	(80)
Realized gain (loss), excluding other-than-temporary impairment losses on securities	2	76	(43)	37
Total realized gain (loss)	(17)	43	(76)	(43)
Amortization of deferred gain on business sold through reinsurance	19	19	37	37
Other revenues and fees	127	124	245	245
Total revenues	2,999	2,898	5,838	5,608
Expenses
Interest credited	627	617	1,244	1,244
Benefits	991	943	1,950	1,795
Commissions and other expenses	898	828	1,792	1,684
Interest and debt expense	65	68	129	135
Total expenses	2,581	2,456	5,115	4,858
Income (loss) from continuing operations before taxes	418	442	723	750
Federal income tax expense (benefit)	101	121	167	185
Income (loss) from continuing operations	317	321	556	565
Income (loss) from discontinued operations, net of federal income taxes				(1)
Net income (loss)	317	321	556	564
Other comprehensive income, net of tax	(1,688)	757	(1,915)	700
Comprehensive income (loss)	$ (1,371)	$ 1,078	$ (1,359)	$ 1,264
Earnings (Loss) Per Common Share - Basic
Income (loss) from continuing operations (in dollars per share)	$ 1.19	$ 1.14	$ 2.07	$ 1.97
Income (loss) from discontinued operations (in dollars per share)
Net income (loss) (in dollars per share)	$ 1.19	$ 1.14	$ 2.07	$ 1.97
Earnings (Loss) Per Common Share - Diluted
Income (loss) from continuing operations (in dollars per share)	$ 1.15	$ 1.09	$ 2.01	$ 1.93
Income (loss) from discontinued operations (in dollars per share)
Net income (loss) (in dollars per share)	$ 1.15	$ 1.09	$ 2.01	$ 1.93