Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	$ 165,460	$ 62,019
Less than 12 months, Gross Unrealized Loss	$ 23,406	$ 1,264
Total number of securities in an unrealized loss position less than 12 months	15,204	4,774
Equal to or Greater than 12 Months, Estimated Fair Value	$ 41,420	$ 13,224
Equal to or Greater than 12 Months ,Gross Unrealized Loss	$ 10,889	$ 1,154
Total number of securities in an unrealized loss position equal or greater than 12 months	4,303	979
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	$ 55,210	$ 8,076
Less than 12 months, Gross Unrealized Loss	7,573	165
Equal to or Greater than 12 Months, Estimated Fair Value	6,484	1,499
Equal to or Greater than 12 Months ,Gross Unrealized Loss	1,965	116
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	31,932	10,011
Less than 12 months, Gross Unrealized Loss	5,999	404
Equal to or Greater than 12 Months, Estimated Fair Value	8,956	2,834
Equal to or Greater than 12 Months ,Gross Unrealized Loss	2,332	327
Foreign government
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	16,568	7,812
Less than 12 months, Gross Unrealized Loss	2,170	319
Equal to or Greater than 12 Months, Estimated Fair Value	8,308	5,377
Equal to or Greater than 12 Months ,Gross Unrealized Loss	2,874	502
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	20,436	14,419
Less than 12 months, Gross Unrealized Loss	2,784	138
Equal to or Greater than 12 Months, Estimated Fair Value	4,177	1,571
Equal to or Greater than 12 Months ,Gross Unrealized Loss	1,076	138
RMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	16,223	10,363
Less than 12 months, Gross Unrealized Loss	1,890	158
Equal to or Greater than 12 Months, Estimated Fair Value	6,650	417
Equal to or Greater than 12 Months ,Gross Unrealized Loss	1,628	30
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	10,924	8,150
Less than 12 months, Gross Unrealized Loss	712	39
Equal to or Greater than 12 Months, Estimated Fair Value	4,326	804
Equal to or Greater than 12 Months ,Gross Unrealized Loss	480	20
Municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	7,277	524
Less than 12 months, Gross Unrealized Loss	1,514	10
Equal to or Greater than 12 Months, Estimated Fair Value	482	65
Equal to or Greater than 12 Months ,Gross Unrealized Loss	199	3
CMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	6,890	2,664
Less than 12 months, Gross Unrealized Loss	764	31
Equal to or Greater than 12 Months, Estimated Fair Value	2,037	657
Equal to or Greater than 12 Months ,Gross Unrealized Loss	335	18
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	157,654	58,358
Less than 12 months, Gross Unrealized Loss	22,713	1,123
Equal to or Greater than 12 Months, Estimated Fair Value	38,785	12,022
Equal to or Greater than 12 Months ,Gross Unrealized Loss	$ 10,298	1,025
Total number of securities in an unrealized loss position equal or greater than 12 months	3,875
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	$ 7,806	3,661
Less than 12 months, Gross Unrealized Loss	693	141
Equal to or Greater than 12 Months, Estimated Fair Value	2,635	1,202
Equal to or Greater than 12 Months ,Gross Unrealized Loss	$ 591	$ 129
Total number of securities in an unrealized loss position equal or greater than 12 months	428

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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