Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Insurance premiums	$ 728	$ 782	$ 1,544	$ 1,572
Fee income	1,288	1,239	2,523	2,460
Net investment income	1,199	1,187	2,371	2,374
Realized gain (loss):
Total other-than-temporary impairment losses on securities	(36)	(14)	(92)	(35)
Portion of loss recognized in other comprehensive income	8	7	28	15
Net other-than-temporary impairment losses on securities recognized in earnings	(28)	(7)	(64)	(20)
Realized gain (loss), excluding other-than-temporary impairment losses on securities	(17)	17	(95)	(18)
Total realized gain (loss)	(45)	10	(159)	(38)
Amortization of deferred gain on business sold through reinsurance	18	18	37	37
Other revenues	119	145	235	280
Total revenues	3,307	3,381	6,551	6,685
Expenses
Interest credited	639	629	1,272	1,254
Benefits	1,208	1,220	2,540	2,456
Commissions and other expenses	978	1,014	1,953	2,027
Interest and debt expense	68	69	136	137
Total expenses	2,893	2,932	5,901	5,874
Income (loss) before taxes	414	449	650	811
Federal income tax expense (benefit)	89	105	117	167
Net income (loss)	325	344	533	644
Other comprehensive income (loss), net of tax	1,264	(1,709)	2,350	(1,152)
Comprehensive income (loss)	$ 1,589	$ (1,365)	$ 2,883	$ (508)
Net Income (Loss) Per Common Share - Basic
Net income (loss) (in dollars per share)	$ 1.37	$ 1.37	$ 2.23	$ 2.54
Net Income (Loss) Per Common Share - Diluted
Net income (loss) (in dollars per share)	1.35	1.35	2.17	2.50
Cash dividends declared per common share	$ 0.25	$ 0.20	$ 0.50	$ 0.40