Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash Flows from Operating Activities
Net income (loss)	$ 133	$ 407
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	(78)	(5)
Trading securities purchases, sales and maturities, net	(1,210)	38
Change in premiums and fees receivable	(38)	(85)
Change in accrued investment income	(54)	(43)
Change in future contract benefits and other contract holder funds	(397)	365
Change in reinsurance related assets and liabilities	(330)	(520)
Change in accrued expenses	(71)	(111)
Change in federal income tax accruals	(15)	76
Realized (gain) loss	351	(22)
Amortization of deferred (gain) loss on business sold through reinsurance	(7)	1
Change in cash management agreement	(12)	128
Other	91	141
Net cash provided by (used in) operating activities	(1,637)	370
Cash Flows from Investing Activities
Purchases of available-for-sale securities and equity securities	(4,353)	(2,005)
Sales of available-for-sale securities and equity securities	2,371	430
Maturities of available-for-sale securities	1,427	1,353
Purchases of alternative investments	(174)	(63)
Sales and repayments of alternative investments	32	31
Issuance of mortgage loans on real estate	(1,099)	(546)
Repayment and maturities of mortgage loans on real estate	240	253
Issuance and repayment of policy loans, net	10	11
Net change in collateral on investments, derivatives and related settlements	567	(108)
Other	(64)	(33)
Net cash provided by (used in) investing activities	(1,043)	(677)
Cash Flows from Financing Activities
Issuance (payment) of short-term debt	398	29
Deposits of fixed account values, including the fixed portion of variable	4,037	2,759
Withdrawals of fixed account values, including the fixed portion of variable	(1,559)	(1,486)
Transfers to and from separate accounts, net	(507)	(686)
Common stock issued for benefit plans	(17)	(17)
Dividends paid	(200)
Net cash provided by (used in) financing activities	2,152	599
Net increase (decrease) in cash, invested cash and restricted cash	(528)	292
Cash, invested cash and restricted cash as of beginning-of-year	1,848	947
Cash, invested cash and restricted cash as of end-of-period	$ 1,320	$ 1,239