Condensed Financial Information (Parent Company) (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Condensed Statements of Cash Flows
Net cash provided by (used in) operating activities	$ (7)	$ (782)	$ 1,249
Cash flows from investing activities
Sales, maturities and repayments of fixed maturity securities	5,922	10,647	12,406
Sales, maturities and repayments of equity securities	30	50	128
Sales, maturities and repayments of mortgage loans	1,206	2,075	2,891
Sales, maturities and repayments of limited partnerships and limited liability companies	205	252	271
Purchases of fixed maturity securities	(8,699)	(15,720)	(21,036)
Purchases of equity securities	(4)	(14)	(18)
Purchases of mortgage loans	(813)	(5,321)	(6,929)
Purchases of limited partnerships and limited liability companies	(453)	(814)	(837)
Cash received in connection with freestanding derivatives	5,048	4,439	3,956
Cash paid in connection with freestanding derivatives	(5,422)	(4,270)	(4,590)
Receipts on loans to affiliate	125	0	0
Issuances of loans to affiliate	0	(125)	(1)
Net change in policy loans	(40)	(29)	15
Net change in short-term investments	(259)	365	1,223
Net change in other invested assets	(109)	(372)	(24)
Net cash provided by (used in) investing activities	(3,263)	(8,837)	(12,545)
Cash flows from financing activities
Policyholder account balances: Deposits	21,514	31,190	15,520
Policyholder account balances: Withdrawals	(17,641)	(19,960)	(4,100)
Net change in payables for collateral under securities loaned and other transactions	(887)	(1,706)	1,016
Dividends paid to parent	(266)	0	(550)
Financing element on certain derivative instruments and other derivative related transactions, net	91	(178)	(368)
Net cash provided by (used in) financing activities	2,683	9,467	11,516
Change in cash, cash equivalents and restricted cash	(587)	(152)	220
Cash, cash equivalents and restricted cash, beginning of year	3,752	3,904	3,684
Cash, cash equivalents and restricted cash, end of year	3,165	3,752	3,904
Supplemental disclosures of cash flow information
Net cash paid (received) for interest	71	69	67
Net cash paid (received) for income tax	0	(12)	53
Non-cash transactions:
Transfer of fixed maturity securities from affiliates	0	99	0
Transfer from investments to affiliates	0	95	0
Parent Company
Condensed Statements of Cash Flows
Net cash provided by (used in) operating activities	238	(938)	1,285
Cash flows from investing activities
Sales, maturities and repayments of fixed maturity securities	5,561	9,701	11,647
Sales, maturities and repayments of equity securities	18	48	107
Sales, maturities and repayments of mortgage loans	1,180	2,036	2,814
Sales, maturities and repayments of limited partnerships and limited liability companies	197	249	271
Purchases of fixed maturity securities	(7,587)	(14,364)	(18,942)
Purchases of equity securities	(3)	(14)	(8)
Purchases of mortgage loans	(775)	(4,864)	(6,680)
Purchases of limited partnerships and limited liability companies	(449)	(807)	(837)
Cash received in connection with freestanding derivatives	4,505	4,327	3,489
Cash paid in connection with freestanding derivatives	(5,207)	(3,833)	(4,471)
Receipts on loans to affiliate	125	0	0
Issuances of loans to affiliate	0	(125)	0
Returns of capital and dividends from subsidiaries	25	30	24
Capital contributions to subsidiaries	0	(100)	0
Net change in policy loans	(40)	(29)	15
Net change in short-term investments	(261)	351	1,021
Net change in other invested assets	(4,530)	(381)	(33)
Net cash provided by (used in) investing activities	(7,241)	(7,775)	(11,583)
Cash flows from financing activities
Policyholder account balances: Deposits	24,917	29,938	14,210
Policyholder account balances: Withdrawals	(17,305)	(19,680)	(3,890)
Net change in payables for collateral under securities loaned and other transactions	(737)	(1,569)	821
Dividends paid to parent	(266)	0	(550)
Financing element on certain derivative instruments and other derivative related transactions, net	(26)	(183)	(368)
Net cash provided by (used in) financing activities	6,583	8,506	10,223
Change in cash, cash equivalents and restricted cash	(420)	(207)	(75)
Cash, cash equivalents and restricted cash, beginning of year	3,102	3,309	3,384
Cash, cash equivalents and restricted cash, end of year	2,682	3,102	3,309
Supplemental disclosures of cash flow information
Net cash paid (received) for interest	65	65	65
Net cash paid (received) for income tax	(20)	(56)	45
Parent Company | Fixed maturity securities
Non-cash transactions:
Transfer of fixed maturity securities from affiliates	103	589	240
Transfer from investments to affiliates	234	296	722
Parent Company | Limited partnerships and limited liability companies
Non-cash transactions:
Transfer from investments to affiliates	0	587	0
Parent Company | Mortgage loans
Non-cash transactions:
Transfer from investments to affiliates	$ 0	$ 89	$ 0