Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities
Net income (loss)	$ 239	$ 243
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads deferrals and interest, net of amortization	(77)	(44)
Trading securities purchases, sales and maturities, net	12	15
Change in premiums and fees receivable	(60)	(29)
Change in accrued investment income	(63)	(45)
Change in future contract benefits and other contract holder funds	(203)	(144)
Change in reinsurance related assets and liabilities	(112)	(2)
Change in federal income tax accruals	66	187
Realized (gain) loss	54	85
Amortization of deferred gain on business sold through reinsurance	(19)	(19)
(Gain) loss on disposal of discontinued operations		1
Other	(88)	34
Net cash provided by (used in) operating activities	(251)	282
Cash Flows from Investing Activities
Purchases of available-for-sale securities	(3,194)	(2,497)
Sales of available-for-sale securities	189	185
Maturities of available-for-sale securities	1,882	1,341
Purchases of other investments	(629)	(830)
Sales or maturities of other investments	573	780
Increase (decrease) in payables for collateral on investments	(74)	(858)
Other	(36)	(34)
Net cash provided by (used in) investing activities	(1,289)	(1,913)
Cash Flows from Financing Activities
Issuance of long-term debt, net of issuance costs		298
Deposits of fixed account values, including the fixed portion of variable	2,517	2,391
Withdrawals of fixed account values, including the fixed portion of variable	(1,281)	(1,320)
Transfers to and from separate accounts, net	(684)	(556)
Common stock issued for benefit plans and excess tax benefits	(2)	(3)
Repurchase of common stock	(100)	(150)
Dividends paid to common and preferred stockholders	(33)	(23)
Net cash provided by (used in) financing activities	417	637
Net increase (decrease) in cash and invested cash, including discontinued operations	(1,123)	(994)
Cash and invested cash, including discontinued operations, as of beginning-of-year	4,230	4,510
Cash and invested cash, including discontinued operations, as of end-of-period	$ 3,107	$ 3,516