Fair Value of Financial Instruments - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	$ 293,011	$ 269,878
Liabilities	(21,257)	(16,962)
Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	70,234	69,657
U.S. government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	398	393
State and municipal bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,567	2,790
Foreign government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	252	283
RMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,882	1,773
CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,643	1,424
ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	13,444	12,171
Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	262	247
Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,206	2,359
Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	293	306
Mortgage loans on real estate
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	263	288
Derivative investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	16,143	11,496
Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	229	233
Cash and invested cash
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	6,013	3,365
MRB assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,565	3,894
Ceded MRBs
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2	2
Liabilities	(341)	(239)
Indexed annuity ceded embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,132	940
Separate account assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	171,483	158,257
RILA, fixed indexed annuity and IUL contracts
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(12,270)	(9,077)
Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(668)	(552)
MRB liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(1,272)	(1,716)
Derivative liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(6,706)	(5,378)
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	832	823
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	378	374
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	51	46
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	0	1
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) | Cash and invested cash
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	403	402
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	281,001	258,928
Liabilities	(7,821)	(4,555)
Significant Observable Inputs (Level 2) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	67,568	67,160
Significant Observable Inputs (Level 2) | U.S. government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	20	19
Significant Observable Inputs (Level 2) | State and municipal bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,567	2,785
Significant Observable Inputs (Level 2) | Foreign government bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	252	283
Significant Observable Inputs (Level 2) | RMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,869	1,760
Significant Observable Inputs (Level 2) | CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,622	1,416
Significant Observable Inputs (Level 2) | ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	11,343	10,687
Significant Observable Inputs (Level 2) | Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	134	153
Significant Observable Inputs (Level 2) | Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,932	2,075
Significant Observable Inputs (Level 2) | Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	258	263
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	16,134	10,874
Significant Observable Inputs (Level 2) | Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	209	233
Significant Observable Inputs (Level 2) | Cash and invested cash
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	6,013	3,365
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	171,080	157,855
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	(1,125)	237
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	(6,696)	(4,792)
Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	11,178	10,127
Liabilities	(13,436)	(12,407)
Significant Unobservable Inputs (Level 3) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,666	2,497
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	5
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	13	13
Significant Unobservable Inputs (Level 3) | CMBS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	21	8
Significant Unobservable Inputs (Level 3) | ABS
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2,101	1,484
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	77	48
Significant Unobservable Inputs (Level 3) | Trading securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	274	284
Significant Unobservable Inputs (Level 3) | Equity securities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	35	42
Significant Unobservable Inputs (Level 3) | Mortgage loans on real estate
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	263	288
Significant Unobservable Inputs (Level 3) | Derivative investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	9	622
Significant Unobservable Inputs (Level 3) | Other investments – short-term investments
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	20	0
Significant Unobservable Inputs (Level 3) | Cash and invested cash
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	0	0
Significant Unobservable Inputs (Level 3) | MRB assets
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	4,565	3,894
Significant Unobservable Inputs (Level 3) | Ceded MRBs
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	2	2
Liabilities	(341)	(239)
Significant Unobservable Inputs (Level 3) | Indexed annuity ceded embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Assets	1,132	940
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	(12,270)	(9,077)
Significant Unobservable Inputs (Level 3) | Reinsurance-related embedded derivatives
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	457	(789)
Significant Unobservable Inputs (Level 3) | MRB liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	(1,272)	(1,716)
Significant Unobservable Inputs (Level 3) | Derivative liabilities
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Liabilities	$ (10)	$ (586)