Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income (loss)	$ 1,515	$ 1,244	$ 1,313
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	(517)	(529)	(219)
Trading securities purchases, sales and maturities, net	309	151	222
Change in premiums and fees receivable	(53)	(40)	28
Change in accrued investment income	(20)	(14)	(34)
Change in future contract benefits and other contract holder funds	524	(634)	(131)
Change in reinsurance related assets and liabilities	(9)	300	9
Change in federal income tax accruals	229	377	192
Realized (gain) loss		135	(74)
(Gain) loss on early extinguishment of debt			5
Amortization of deferred gain on business sold through reinsurance	(74)	(74)	(74)
Impairment of intangibles
(Gain) loss on disposal of discontinued operations	(1)		1
Proceeds from reinsurance recapture	422
Other	200	(117)	31
Net cash provided by (used in) operating activities	2,526	799	1,269
Cash Flows from Investing Activities
Purchases of available-for-sale securities	(8,636)	(10,880)	(11,161)
Sales of available-for-sale securities	1,118	975	1,134
Maturities of available-for-sale securities	5,212	6,171	5,974
Purchases of other investments	(4,925)	(2,543)	(2,345)
Sales or maturities of other investments	4,489	2,610	2,276
Increase (decrease) in payables for collateral on investments	1,019	(943)	448
Other	(82)	(100)	(183)
Net cash provided by (used in) investing activities	(1,805)	(4,710)	(3,857)
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities	(500)		(320)
Issuance of long-term debt, net of issuance costs		393	300
Proceeds from sales leaseback transaction	83
Deposits of fixed account values, including the fixed portion of variable	10,388	10,492	10,694
Withdrawals of fixed account values, including the fixed portion of variable	(5,840)	(5,296)	(5,691)
Transfers to and from separate accounts, net	(2,509)	(3,001)	(2,091)
Common stock issued for benefit plans and excess tax benefits	32	35	(1)
Repurchase of common stock	(650)	(450)	(492)
Dividends paid to common and preferred stockholders	(170)	(128)	(91)
Net cash provided by (used in) financing activities	834	2,045	2,308
Net increase (decrease) in cash and invested cash, including discontinued operations	1,555	(1,866)	(280)
Cash and invested cash, including discontinued operations, as of beginning-of-year	2,364	4,230	4,510
Cash and invested cash, including discontinued operations, as of end-of-year	$ 3,919	$ 2,364	$ 4,230