Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities by Sector) (Details) $ in Millions	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	$ 56,585	$ 16,729
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	$ 8,269	$ 305
Fixed maturity securities in continuous unrealized loss position, less than 12 months, number of securities	7,987	2,423
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	$ 8,055	$ 1,658
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	$ 2,302	$ 145
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, number of securities	1,377	368
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	$ 26,073	$ 5,051
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	4,173	111
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	2,653	887
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	931	76
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	8,553	2,016
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	1,906	60
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	1,050	305
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	442	43
RMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	5,277	3,481
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	572	50
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	1,806	32
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	382	1
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	3,410	1,712
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	286	40
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	1,076	222
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	321	20
CMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	5,919	1,390
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	565	21
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	603	95
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	126	3
State and political subdivision
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	2,172	347
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	364	6
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	94	6
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	29	0
ABS
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	4,333	2,454
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	265	13
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	773	93
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	71	1
Foreign government
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	848	278
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	138	4
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	0	18
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	$ 0	$ 1

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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