Fair Value of Financial Instruments - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	$ 266,110	$ 274,026
Liabilities	(17,118)	(19,925)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	936	808
Liabilities	0	0
Significant Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	248,522	256,411
Liabilities	(2,691)	(3,469)
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	16,652	16,807
Liabilities	(14,427)	(16,456)
Corporate bonds | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	62,299	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	55,348	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	6,951	7,025
U.S. government bonds | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	537	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	517	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	2,122	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	2,122	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	1,780	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	1,761	1,691
RMBS | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	19	12
CMBS | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,746	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	1,716	1,575
CMBS | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	30	8
ABS | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	14,131	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	11,500	11,670
ABS | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,631	2,099
Hybrid and redeemable preferred securities | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	260	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	46	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	133	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	81	72
Trading securities | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,969	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	1,682	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	287	265
Equity securities | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	340	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	0	0
Equity securities | Significant Observable Inputs (Level 2) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	311	260
Equity securities | Significant Unobservable Inputs (Level 3) | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	29	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	11,103	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	11,093	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	10	3
Other investments – short-term investments | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	483	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	468	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	15	23
MRB assets | Fixed maturity AFS securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,157	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	4,157	4,860
Ceded MRBs | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	102	14
Ceded MRBs | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(2,103)	(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	102	14
Ceded MRBs | Significant Unobservable Inputs (Level 3) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(2,103)	(2,763)
Indexed annuity ceded embedded derivatives | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,918	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	1,918	1,970
LPR ceded derivative | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	190	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	190	190
Separate account assets | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	162,506	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	373	391
Separate account assets | Significant Observable Inputs (Level 2) | Other assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	162,133	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	(10,807)	(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	(10,807)	(12,449)
Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	586	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	678	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	(1,306)	(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	(1,306)	(1,046)
Derivative liabilities | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(3,488)	(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	(3,369)	(4,256)
Derivative liabilities | Significant Unobservable Inputs (Level 3) | Other liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	$ (119)	$ (139)