Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Insurance premiums	$ 1,165	$ 801	$ 1,943	$ 1,608
Fee income	1,470	1,393	2,926	2,747
Net investment income	1,232	1,262	2,465	2,499
Realized gain (loss):
Total other-than-temporary impairment losses on securities	(1)	(4)	(3)	(8)
Portion of loss recognized in other comprehensive income
Net other-than-temporary impairment losses on securities recognized in earnings	(1)	(4)	(3)	(8)
Realized gain (loss), excluding other-than-temporary impairment losses on securities	(6)	(6)	8	(41)
Total realized gain (loss)	(7)	(10)	5	(49)
Amortization of deferred gain on business sold through reinsurance		4		22
Other revenues	160	127	290	250
Total revenues	4,020	3,577	7,629	7,077
Expenses
Interest credited	647	646	1,300	1,293
Benefits	1,661	1,287	3,019	2,578
Commissions and other expenses	1,177	1,034	2,234	2,048
Interest and debt expense	68	63	159	127
Strategic digitization expense	16	14	31	23
Total expenses	3,569	3,044	6,743	6,069
Income (loss) before taxes	451	533	886	1,008
Federal income tax expense (benefit)	66	122	134	162
Net income (loss)	385	411	752	846
Other comprehensive income (loss), net of tax	(1,032)	864	(2,671)	1,145
Comprehensive income (loss)	$ (647)	$ 1,275	$ (1,919)	$ 1,991
Net Income (Loss) Per Common Share
Basic (in dollars per share)	$ 1.76	$ 1.84	$ 3.45	$ 3.77
Diluted (in dollars per share)	1.70	1.81	3.34	3.70
Cash Dividends Declared Per Common Share	$ 0.33	$ 0.29	$ 0.66	$ 0.58