Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Insurance premiums	$ 774	$ 708	$ 2,382	$ 2,252
Fee income	1,401	1,376	4,148	3,899
Net investment income	1,239	1,259	3,738	3,630
Realized gain (loss):
Total other-than-temporary impairment losses on securities	(9)	(22)	(17)	(113)
Portion of loss recognized in other comprehensive income	1	9	1	37
Net other-than-temporary impairment losses on securities recognized in earnings	(8)	(13)	(16)	(76)
Realized gain (loss), excluding other-than-temporary impairment losses on securities	(48)	50	(89)	(45)
Total realized gain (loss)	(56)	37	(105)	(121)
Amortization of deferred gain on business sold through reinsurance		18	22	55
Other revenues	153	127	403	361
Total revenues	3,511	3,525	10,588	10,076
Expenses
Interest credited	647	642	1,940	1,914
Benefits	1,261	922	3,839	3,462
Commissions and other expenses	1,020	1,283	3,068	3,236
Interest and debt expense	63	66	190	202
Strategic digitization expense	10		33
Total expenses	3,001	2,913	9,070	8,814
Income (loss) before taxes	510	612	1,518	1,262
Federal income tax expense (benefit)	92	145	254	260
Net income (loss)	418	467	1,264	1,002
Other comprehensive income (loss), net of tax	148	182	1,293	2,532
Comprehensive income (loss)	$ 566	$ 649	$ 2,557	$ 3,534
Net Income (Loss) Per Common Share
Basic (in dollars per share)	$ 1.89	$ 2.02	$ 5.66	$ 4.24
Diluted (in dollars per share)	1.87	2.00	5.58	4.17
Cash dividends declared per common share	$ 0.29	$ 0.25	$ 0.87	$ 0.75