Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash Flows from Operating Activities
Net income (loss)	$ 208	$ 300
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	5	(42)
Trading securities purchases, sales and maturities, net	28	12
Change in premiums and fees receivable	(25)	21
Change in accrued investment income	(38)	(80)
Change in future contract benefits and other contract holder funds	262	162
Change in reinsurance related assets and liabilities	(286)	(178)
Change in federal income tax accruals	(38)	(28)
Realized (gain) loss	114	48
Amortization of deferred gain on business sold through reinsurance	(18)	(18)
Other	83	99
Net cash provided by (used in) operating activities	295	296
Cash Flows from Investing Activities
Purchases of available-for-sale securities	(3,291)	(2,629)
Sales of available-for-sale securities	1,502	142
Maturities of available-for-sale securities	1,269	1,041
Purchases of other investments	(5,230)	(3,646)
Sales or maturities of other investments	4,713	3,455
Increase (decrease) in payables for collateral on investments	357	634
Other	(27)	(32)
Net cash provided by (used in) investing activities	(707)	(1,035)
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	2,672	2,464
Withdrawals of fixed account values, including the fixed portion of variable	(1,413)	(1,408)
Transfers to and from separate accounts, net	(549)	(657)
Common stock issued for benefit plans and excess tax benefits	(7)	12
Repurchase of common stock	(200)	(350)
Dividends paid to common stockholders	(60)	(52)
Net cash provided by (used in) financing activities	443	307
Net increase (decrease) in cash and invested cash	31	(432)
Cash and invested cash as of beginning-of-year	3,146	3,919
Cash and invested cash as of end-of-year	$ 3,177	$ 3,487