Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities by Sector) (Details) $ in Millions	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	$ 8,056	$ 20,825
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	$ 648	$ 1,460
Fixed maturity securities in continuous unrealized loss position, less than 12 months, number of securities	1,313	3,356
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	$ 37,860	$ 36,595
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	$ 5,188	$ 6,388
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, number of securities	5,035	5,195
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	$ 4,126	$ 10,758
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	394	719
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	18,777	17,329
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	2,637	3,146
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	1,380	3,269
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	179	351
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	5,203	5,502
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	812	1,117
RMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	822	1,227
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	48	82
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	4,338	4,624
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	523	785
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	587	2,384
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	10	116
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	2,229	1,858
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	591	575
ABS
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	513	717
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	2	10
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	749	1,076
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	54	65
CMBS
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	323	1,326
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	3	90
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	4,227	4,338
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	219	325
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	251	871
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	7	63
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	1,777	1,435
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	290	304
Foreign government
Debt Securities, Available-for-sale [Line Items]
Fixed maturity securities in continuous unrealized loss position, less than 12 months, estimated fair value	54	273
Fixed maturity securities in continuous unrealized loss position, less than 12 months, gross unrealized losses	5	29
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, estimated fair value	560	433
Fixed maturity securities in continuous unrealized loss position, 12 months or greater, gross unrealized losses	$ 62	$ 71