Closed Block (Liabilities and Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Closed Block Liabilities
Future policy benefits	$ 36,142	$ 37,222
Other policy-related balances	319	273
Policyholder dividends payable	174	181
Other liabilities	668	455
Total closed block liabilities	37,303	38,131
Assets Designated to the Closed Block
Fixed maturity securities available-for-sale, at estimated fair value	19,939	19,648
Equity securities, at estimated fair value	10	13
Mortgage loans	6,151	6,564
Policy loans	3,960	4,084
Real estate and real estate joint ventures	668	635
Other invested assets	496	692
Total investments	31,224	31,636
Cash and cash equivalents	717	437
Accrued investment income	383	375
Premiums, reinsurance and other receivables	54	52
Current income tax recoverable	3	88
Deferred income tax asset	312	423
Total assets designated to the closed block	32,693	33,011
Excess of closed block liabilities over assets designated to the closed block	4,610	5,120
AOCI:
Unrealized investment gains (losses), net of income tax	(820)	(1,357)
Unrealized gains (losses) on derivatives, net of income tax	130	262
Total amounts included in AOCI	(690)	(1,095)
Maximum future earnings to be recognized from closed block assets and liabilities	$ 3,920	$ 4,025