Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities
Net income (loss)	$ 1,154	$ 1,515	$ 1,244
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads deferrals and interest, net of amortization	(119)	(517)	(529)
Trading securities purchases, sales and maturities, net	146	309	151
Change in premiums and fees receivable	97	(53)	(40)
Change in accrued investment income	(21)	(20)	(14)
Change in future contract benefits and other contract holder funds	991	524	(634)
Change in reinsurance related assets and liabilities	(252)	(9)	300
Change in federal income tax accruals	61	229	377
Realized (gain) loss	151		135
Amortization of deferred gain on business sold through reinsurance	(74)	(74)	(74)
Proceeds From Reinsurance Recapture		422
Other	109	200	(117)
Net cash provided by (used in) operating activities	2,243	2,526	799
Cash Flows from Investing Activities
Purchases of available-for-sale securities	(9,429)	(8,636)	(10,880)
Sales of available-for-sale securities	1,351	1,118	975
Maturities of available-for-sale securities	4,408	5,212	6,171
Purchases of other investments	(15,323)	(4,925)	(2,543)
Sales or maturities of other investments	14,524	4,489	2,610
Increase (decrease) in payables for collateral on investments	251	1,019	(943)
Proceeds from sale of subsidiaries/businesses, net of cash disposed	75
Other	(80)	(82)	(100)
Net cash provided by (used in) investing activities	(4,223)	(1,805)	(4,710)
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities	(250)	(500)
Issuance of long-term debt, net of issuance costs	298		393
Proceeds from sales leaseback transaction	47	83
Deposits of fixed account values, including the fixed portion of variable	10,769	10,388	10,492
Withdrawals of fixed account values, including the fixed portion of variable	(6,126)	(5,840)	(5,296)
Transfers to and from separate accounts, net	(2,474)	(2,509)	(3,001)
Common stock issued for benefit plans and excess tax benefits	47	32	35
Repurchase of common stock	(900)	(650)	(450)
Dividends paid to common and preferred stockholders	(204)	(170)	(128)
Net cash provided by (used in) financing activities	1,207	834	2,045
Net increase (decrease) in cash and invested cash	(773)	1,555	(1,866)
Cash and invested cash as of beginning-of-year	3,919	2,364	4,230
Cash and invested cash as of end-of-year	$ 3,146	$ 3,919	$ 2,364