Investments (Fixed Maturity Securities Available-For-Sale by Sector) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 307,421	$ 300,555
Allowance for Credit Loss for Debt Securities	(160)	(184)	$ (183)
Gross Unrealized Gains	4,981	6,876
Gross Unrealized Losses	31,199	25,835
Estimated Fair Value of Fixed Maturity Securities AFS	281,043	281,412
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	86,315	85,563
Allowance for Credit Loss for Debt Securities	(59)	(68)	(29)
Gross Unrealized Gains	1,331	1,894
Gross Unrealized Losses	8,213	6,672
Estimated Fair Value of Fixed Maturity Securities AFS	79,374	80,717
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	58,646	59,123
Allowance for Credit Loss for Debt Securities	(18)	(2)	(5)
Gross Unrealized Gains	1,478	1,750
Gross Unrealized Losses	6,347	5,427
Estimated Fair Value of Fixed Maturity Securities AFS	53,759	55,444
Foreign government
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	44,377	48,260
Allowance for Credit Loss for Debt Securities	(57)	(88)	(130)
Gross Unrealized Gains	1,256	1,754
Gross Unrealized Losses	5,326	4,437
Estimated Fair Value of Fixed Maturity Securities AFS	40,250	45,489
RMBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	37,085	31,479
Allowance for Credit Loss for Debt Securities	(1)	(1)	0
Gross Unrealized Gains	314	353
Gross Unrealized Losses	2,977	2,735
Estimated Fair Value of Fixed Maturity Securities AFS	34,421	29,096
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	38,963	35,374
Allowance for Credit Loss for Debt Securities	0	0
Gross Unrealized Gains	179	590
Gross Unrealized Losses	5,714	3,712
Estimated Fair Value of Fixed Maturity Securities AFS	33,428	32,252
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,973	17,910
Allowance for Credit Loss for Debt Securities	(9)	(7)	0
Gross Unrealized Gains	153	54
Gross Unrealized Losses	526	663
Estimated Fair Value of Fixed Maturity Securities AFS	20,591	17,294
Municipals
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,205	11,991
Allowance for Credit Loss for Debt Securities	0	0
Gross Unrealized Gains	166	408
Gross Unrealized Losses	1,498	1,228
Estimated Fair Value of Fixed Maturity Securities AFS	9,873	11,171
CMBS
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	9,857	10,855
Allowance for Credit Loss for Debt Securities	(16)	(18)	$ (19)
Gross Unrealized Gains	104	73
Gross Unrealized Losses	598	961
Estimated Fair Value of Fixed Maturity Securities AFS	$ 9,347	$ 9,949

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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