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	$ 280,688	$ 274,026
Liabilities	(22,193)	(19,925)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	959	808
Liabilities	0	0
Significant Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	261,654	256,411
Liabilities	(5,086)	(3,469)
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	18,075	16,807
Liabilities	(17,107)	(16,456)
Corporate bonds | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	62,731	61,833
Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Corporate bonds | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	55,491	54,808
Corporate bonds | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	7,240	7,025
U.S. government bonds | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	563	390
U.S. government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	543	370
U.S. government bonds | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	20	20
U.S. government bonds | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
State and municipal bonds | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,021	2,148
State and municipal bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
State and municipal bonds | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,021	2,148
State and municipal bonds | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Foreign government bonds | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	235	233
Foreign government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Foreign government bonds | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	235	233
Foreign government bonds | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
RMBS | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,903	1,703
RMBS | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
RMBS | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,824	1,691
RMBS | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	79	12
CMBS | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,887	1,583
CMBS | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
CMBS | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,846	1,575
CMBS | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	41	8
ABS | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	14,546	13,769
ABS | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
ABS | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	11,546	11,670
ABS | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	3,000	2,099
Hybrid and redeemable preferred securities | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	252	241
Hybrid and redeemable preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	43	47
Hybrid and redeemable preferred securities | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	118	122
Hybrid and redeemable preferred securities | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	91	72
Trading securities | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,894	2,005
Trading securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Trading securities | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,598	1,740
Trading securities | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	296	265
Equity securities | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	334	294
Equity securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2	0
Equity securities | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	254	260
Equity securities | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	78	34
Mortgage loans on real estate | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	232	232
Mortgage loans on real estate | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Mortgage loans on real estate | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Mortgage loans on real estate | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	232	232
Derivative investments | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	13,883	13,731
Derivative investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Derivative investments | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	13,818	13,728
Derivative investments | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	65	3
Other investments – short-term investments | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	336	392
Other investments – short-term investments | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Other investments – short-term investments | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	312	369
Other investments – short-term investments | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	24	23
MRB assets | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,577	4,860
MRB assets | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
MRB assets | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
MRB assets | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,577	4,860
Ceded MRBs | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	20	14
Ceded MRBs | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(2,541)	(2,763)
Ceded MRBs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Ceded MRBs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Ceded MRBs | Significant Observable Inputs (Level 2) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Ceded MRBs | Significant Observable Inputs (Level 2) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Ceded MRBs | Significant Unobservable Inputs (Level 3) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	20	14
Ceded MRBs | Significant Unobservable Inputs (Level 3) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(2,541)	(2,763)
Indexed annuity ceded embedded derivatives | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,134	1,970
Indexed annuity ceded embedded derivatives | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Indexed annuity ceded embedded derivatives | Significant Observable Inputs (Level 2) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Indexed annuity ceded embedded derivatives | Significant Unobservable Inputs (Level 3) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,134	1,970
LPR ceded derivative | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	198	190
LPR ceded derivative | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
LPR ceded derivative | Significant Observable Inputs (Level 2) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
LPR ceded derivative | Significant Unobservable Inputs (Level 3) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	198	190
Separate account assets | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	172,942	168,438
Separate account assets | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	371	391
Separate account assets | Significant Observable Inputs (Level 2) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	172,571	168,047
Separate account assets | Significant Unobservable Inputs (Level 3) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
RILA, fixed indexed annuity and IUL contracts | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(13,089)	(12,449)
RILA, fixed indexed annuity and IUL contracts | Quoted Prices in Active Markets for Identical Assets (Level 1) | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
RILA, fixed indexed annuity and IUL contracts | Significant Observable Inputs (Level 2) | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
RILA, fixed indexed annuity and IUL contracts | Significant Unobservable Inputs (Level 3) | Policyholder account balances
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	470	728
Reinsurance-related embedded derivatives | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Reinsurance-related embedded derivatives | Significant Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	562	787
Reinsurance-related embedded derivatives | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(92)	(59)
MRB liabilities | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(1,205)	(1,046)
MRB liabilities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
MRB liabilities | Significant Observable Inputs (Level 2) | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
MRB liabilities | Significant Unobservable Inputs (Level 3) | Policyholder account balances
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(1,205)	(1,046)
Derivative liabilities | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(5,828)	(4,395)
Derivative liabilities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	0	0
Derivative liabilities | Significant Observable Inputs (Level 2) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(5,648)	(4,256)
Derivative liabilities | Significant Unobservable Inputs (Level 3) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	$ (180)	$ (139)