Fair Value of Financial Instruments - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	$ 284,974	$ 278,356
Liabilities	(20,603)	(18,301)
Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	67,372	66,450
U.S. government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	563	391
State and municipal bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,254	2,371
Foreign government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	239	237
RMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,063	1,863
CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,972	1,665
ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	14,658	13,880
Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	265	254
Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,909	2,025
Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	341	294
Mortgage loans on real estate
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	232	232
Derivative investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	14,013	13,887
Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	336	392
MRB assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,577	4,860
Ceded MRBs
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2	2
Liabilities	(341)	(381)
Indexed annuity ceded embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,236	1,115
Separate account assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	172,942	168,438
RILA, fixed indexed annuity and IUL contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(13,089)	(12,449)
Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(140)	(30)
MRB liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(1,205)	(1,046)
Derivative liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(5,828)	(4,395)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	963	810
Liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	544	371
Quoted Prices in Active Markets for Identical Assets (Level 1) | State and municipal bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | RMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	44	48
Quoted Prices in Active Markets for Identical Assets (Level 1) | Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage loans on real estate
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | MRB assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Ceded MRBs
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Indexed annuity ceded embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Separate account assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	371	391
Quoted Prices in Active Markets for Identical Assets (Level 1) | RILA, fixed indexed annuity and IUL contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | MRB liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Significant Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	271,208	265,955
Liabilities	(5,479)	(4,052)
Significant Observable Inputs (Level 2) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	64,296	63,585
Significant Observable Inputs (Level 2) | U.S. government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	19	20
Significant Observable Inputs (Level 2) | State and municipal bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,254	2,371
Significant Observable Inputs (Level 2) | Foreign government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	239	237
Significant Observable Inputs (Level 2) | RMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,984	1,851
Significant Observable Inputs (Level 2) | CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,931	1,657
Significant Observable Inputs (Level 2) | ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	11,658	11,781
Significant Observable Inputs (Level 2) | Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	129	133
Significant Observable Inputs (Level 2) | Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,613	1,760
Significant Observable Inputs (Level 2) | Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	254	260
Significant Observable Inputs (Level 2) | Mortgage loans on real estate
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Observable Inputs (Level 2) | Derivative investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	13,948	13,884
Significant Observable Inputs (Level 2) | Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	312	369
Significant Observable Inputs (Level 2) | MRB assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Observable Inputs (Level 2) | Ceded MRBs
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Liabilities	0	0
Significant Observable Inputs (Level 2) | Indexed annuity ceded embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Observable Inputs (Level 2) | Separate account assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	172,571	168,047
Significant Observable Inputs (Level 2) | RILA, fixed indexed annuity and IUL contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Significant Observable Inputs (Level 2) | Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	169	204
Significant Observable Inputs (Level 2) | MRB liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Significant Observable Inputs (Level 2) | Derivative liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(5,648)	(4,256)
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	12,803	11,591
Liabilities	(15,124)	(14,249)
Significant Unobservable Inputs (Level 3) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	3,076	2,865
Significant Unobservable Inputs (Level 3) | U.S. government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Unobservable Inputs (Level 3) | State and municipal bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Unobservable Inputs (Level 3) | Foreign government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Unobservable Inputs (Level 3) | RMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	79	12
Significant Unobservable Inputs (Level 3) | CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	41	8
Significant Unobservable Inputs (Level 3) | ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	3,000	2,099
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	92	73
Significant Unobservable Inputs (Level 3) | Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	296	265
Significant Unobservable Inputs (Level 3) | Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	83	34
Significant Unobservable Inputs (Level 3) | Mortgage loans on real estate
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	232	232
Significant Unobservable Inputs (Level 3) | Derivative investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	65	3
Significant Unobservable Inputs (Level 3) | Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	24	23
Significant Unobservable Inputs (Level 3) | MRB assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,577	4,860
Significant Unobservable Inputs (Level 3) | Ceded MRBs
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2	2
Liabilities	(341)	(381)
Significant Unobservable Inputs (Level 3) | Indexed annuity ceded embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,236	1,115
Significant Unobservable Inputs (Level 3) | Separate account assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Unobservable Inputs (Level 3) | RILA, fixed indexed annuity and IUL contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(13,089)	(12,449)
Significant Unobservable Inputs (Level 3) | Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(309)	(234)
Significant Unobservable Inputs (Level 3) | MRB liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(1,205)	(1,046)
Significant Unobservable Inputs (Level 3) | Derivative liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	$ (180)	$ (139)