Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Insurance premiums	$ 3,246	$ 2,988	$ 2,687
Fee income	5,045	4,673	4,069
Net investment income	4,827	4,859	4,754
Realized gain (loss):
Total other-than-temporary impairment losses on securities	(80)	(26)	(80)
Portion of loss recognized in other comprehensive income	26	10	10
Net other-than-temporary impairment losses on securities recognized in earnings	(54)	(16)	(70)
Realized gain (loss), excluding other-than-temporary impairment losses on securities	(97)	16	(65)
Total realized gain (loss)	(151)		(135)
Amortization of deferred gain on business sold through reinsurance	74	74	74
Other revenues	531	960	520
Total revenues	13,572	13,554	11,969
Expenses
Interest credited	2,508	2,532	2,510
Benefits	5,044	4,679	3,862
Commissions and other expenses	4,318	4,079	3,701
Interest and debt expense	272	267	265
Total expenses	12,142	11,557	10,338
Income (loss) from continuing operations before taxes	1,430	1,997	1,631
Federal income tax expense (benefit)	276	483	387
Income (loss) from continuing operations	1,154	1,514	1,244
Income (loss) from discontinued operations, net of federal income taxes		1
Net income (loss)	1,154	1,515	1,244
Unrealized investment gains (losses)	(2,229)	1,591	(2,335)
Foreign currency translation adjustment	(2)	2	(1)
Funded status of employee benefit plans	(20)	(60)	91
Total other comprehensive income (loss), net of tax	(2,251)	1,533	(2,245)
Comprehensive income (loss)	$ (1,097)	$ 3,048	$ (1,001)
Earnings (Loss) Per Common Share - Basic
Income (loss) from continuing operations (in dollars per share)	$ 4.60	$ 5.81	$ 4.68
Net income (loss) (in dollars per share)	4.60	5.81	4.68
Earnings (Loss) Per Common Share - Diluted
Income (loss) from continuing operations (in dollars per share)	4.51	5.67	4.52
Net income (loss) (in dollars per share)	4.51	5.67	4.52
Cash dividends declared per common share	$ 0.85	$ 0.68	$ 0.52