Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 95,285	$ 165,460
Less than 12 months Gross Unrealized Loss	$ 7,583	$ 23,406
Total number of securities in an unrealized loss position less than 12 months	9,207	15,204
Equal to or Greater than 12 Months Estimated Fair Value	$ 100,405	$ 41,420
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 19,841	$ 10,889
Total number of securities in an unrealized loss position equal or greater than 12 months	9,689	4,303
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 33,635	$ 55,210
Less than 12 months Gross Unrealized Loss	2,628	7,573
Equal to or Greater than 12 Months Estimated Fair Value	24,769	6,484
Equal to or Greater than 12 Months Gross Unrealized Loss	5,000	1,965
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	18,388	31,932
Less than 12 months Gross Unrealized Loss	1,999	5,999
Equal to or Greater than 12 Months Estimated Fair Value	21,446	8,956
Equal to or Greater than 12 Months Gross Unrealized Loss	5,004	2,332
Foreign government
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	8,993	16,568
Less than 12 months Gross Unrealized Loss	719	2,170
Equal to or Greater than 12 Months Estimated Fair Value	14,933	8,308
Equal to or Greater than 12 Months Gross Unrealized Loss	3,078	2,874
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	13,610	20,436
Less than 12 months Gross Unrealized Loss	1,001	2,784
Equal to or Greater than 12 Months Estimated Fair Value	7,617	4,177
Equal to or Greater than 12 Months Gross Unrealized Loss	1,835	1,076
RMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	9,719	16,223
Less than 12 months Gross Unrealized Loss	583	1,890
Equal to or Greater than 12 Months Estimated Fair Value	12,075	6,650
Equal to or Greater than 12 Months Gross Unrealized Loss	2,262	1,628
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	3,998	10,924
Less than 12 months Gross Unrealized Loss	138	712
Equal to or Greater than 12 Months Estimated Fair Value	10,890	4,326
Equal to or Greater than 12 Months Gross Unrealized Loss	854	480
Municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	3,067	7,277
Less than 12 months Gross Unrealized Loss	275	1,514
Equal to or Greater than 12 Months Estimated Fair Value	3,770	482
Equal to or Greater than 12 Months Gross Unrealized Loss	1,054	199
CMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	3,875	6,890
Less than 12 months Gross Unrealized Loss	240	764
Equal to or Greater than 12 Months Estimated Fair Value	4,905	2,037
Equal to or Greater than 12 Months Gross Unrealized Loss	754	335
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	90,702	157,654
Less than 12 months Gross Unrealized Loss	7,360	22,713
Equal to or Greater than 12 Months Estimated Fair Value	95,314	38,785
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 18,978	10,298
Total number of securities in an unrealized loss position equal or greater than 12 months	8,880
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 4,583	7,806
Less than 12 months Gross Unrealized Loss	223	693
Equal to or Greater than 12 Months Estimated Fair Value	5,091	2,635
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 863	$ 591
Total number of securities in an unrealized loss position equal or greater than 12 months	809

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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