Closed Block (Liabilities and Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Closed Block Liabilities
Future policy benefits	$ 37,214	$ 38,046
Other policy-related balances	273	290
Policyholder dividends payable	181	253
Policyholder dividend obligation	0	1,682	$ 2,969	$ 2,020
Deferred income tax liability	0	210
Other liabilities	455	263
Total closed block liabilities	38,123	40,744
Assets Designated to the Closed Block
Fixed maturity securities available-for-sale, at estimated fair value	19,648	25,669
Equity securities, at estimated fair value	13	21
Mortgage loans	6,564	6,417
Policy loans	4,084	4,191
Real estate and real estate joint ventures	635	565
Other invested assets	692	535
Total investments	31,636	37,398
Cash and cash equivalents	437	126
Accrued investment income	375	384
Premiums, reinsurance and other receivables	52	50
Current income tax recoverable	88	81
Deferred income tax asset	423	0
Total assets designated to the closed block	33,011	38,039
Excess of closed block liabilities over assets designated to the closed block	5,112	2,705
AOCI:
Unrealized investment gains (losses), net of income tax	(1,357)	2,562
Unrealized gains (losses) on derivatives, net of income tax	262	107
Allocated to policyholder dividend obligation, net of income tax	0	(1,329)
Total amounts included in AOCI	(1,095)	1,340
Maximum future earnings to be recognized from closed block assets and liabilities	$ 4,017	$ 4,045