Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net income (loss)	$ 52	$ 252
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Realized (gain) loss	24	362
Trading securities purchases, sales and maturities, net	235	(1,209)
Amortization of deferred gain on business sold through reinsurance	(11)	(8)
Deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads deferrals and interest, net of amortization	(169)	(70)
Change in premiums and fees receivable	(97)	(37)
Change in accrued investment income	(37)	(65)
Change in future contract benefits and other contract holder funds	1,389	(348)
Change in reinsurance related assets and liabilities	(653)	(299)
Change in accrued expenses	(317)	(56)
Change in federal income tax accruals	(18)	16
Other	57	131
Net cash provided by (used in) operating activities	455	(1,331)
Cash Flows from Investing Activities
Purchases of available-for-sale securities and equity securities	(3,590)	(4,404)
Sales of available-for-sale securities and equity securities	395	2,381
Maturities of available-for-sale securities	1,317	1,456
Purchases of alternative investments	(79)	(174)
Sales and repayments of alternative investments	55	32
Issuance of mortgage loans on real estate	(839)	(1,103)
Repayment and maturities of mortgage loans on real estate	227	242
Issuance (repayment) of policy loans, net	(94)	11
Net change in collateral on investments, derivatives and related settlements	3,411	488
Other	(61)	(62)
Net cash provided by (used in) investing activities	742	(1,133)
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities	(300)
Issuance of long-term debt, net of issuance costs	499
Deposits of fixed account values, including the fixed portion of variable	3,917	4,042
Withdrawals of fixed account values, including the fixed portion of variable	(1,684)	(1,570)
Transfers to and from separate accounts, net	323	(507)
Common stock issued for benefit plans	(9)	(26)
Repurchase of common stock	(225)	(150)
Dividends paid to common stockholders	(79)	(77)
Net cash provided by (used in) financing activities	2,442	1,712
Net increase (decrease) in cash, invested cash and restricted cash	3,639	(752)
Cash, invested cash and restricted cash as of beginning-of-year	2,563	2,345
Cash, invested cash and restricted cash as of end-of-period	$ 6,202	$ 1,593