Closed Block (Liabilities and Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Closed Block Liabilities
Future policy benefits	$ 38,046	$ 38,758
Other policy-related balances	290	321
Policyholder dividends payable	253	337
Policyholder dividend obligation	1,682	2,969	$ 2,020	$ 428
Deferred income tax liability	210	130
Other liabilities	263	172
Total closed block liabilities	40,744	42,687
Assets Designated to the Closed Block
Fixed maturity securities available-for-sale, at estimated fair value	25,669	27,186
Equity securities, at estimated fair value	21	24
Mortgage loans	6,417	6,807
Policy loans	4,191	4,355
Real estate and real estate joint ventures	565	559
Other invested assets	535	468
Total investments	37,398	39,399
Cash and cash equivalents	126	0
Accrued investment income	384	402
Premiums, reinsurance and other receivables	50	50
Current income tax recoverable	81	28
Total assets designated to the closed block	38,039	39,879
Excess of closed block liabilities over assets designated to the closed block	2,705	2,808
AOCI:
Unrealized investment gains (losses), net of income tax	2,562	3,524
Unrealized gains (losses) on derivatives, net of income tax	107	23
Allocated to policyholder dividend obligation, net of income tax	(1,329)	(2,346)
Total amounts included in AOCI	1,340	1,201
Maximum future earnings to be recognized from closed block assets and liabilities	$ 4,045	$ 4,009