Fair Value of Financial Instruments - Fair Value Inputs Quantitative Information (Details) $ in Millions	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Assets
Fair Value	$ 90,682	$ 88,738
Market risk benefit assets	4,565	3,894
Liabilities
Market risk benefit liabilities	(1,272)	(1,716)
Corporate bonds
Assets
Fair Value	70,234	69,657
State and municipal bonds
Assets
Fair Value	2,567	2,790
ABS
Assets
Fair Value	13,444	12,171
CMBS
Assets
Fair Value	1,643	1,424
Hybrid and redeemable preferred securities
Assets
Fair Value	262	247
Significant Unobservable Inputs (Level 3)
Assets
Equity securities	5	5
Market risk benefit assets	4,565	3,894
Embedded derivative asset	1,132	940
Liabilities
Embedded derivative liability	(12,176)	(9,013)
Market risk benefit liabilities	(1,272)	(1,716)
Significant Unobservable Inputs (Level 3) | Corporate bonds
Assets
Fair Value	183	186
Significant Unobservable Inputs (Level 3) | State and municipal bonds
Assets
Fair Value		5
Significant Unobservable Inputs (Level 3) | ABS
Assets
Fair Value	11	12
Significant Unobservable Inputs (Level 3) | CMBS
Assets
Fair Value	8	8
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Assets
Fair Value	24	7
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs
Assets
Market risk benefit assets	2	2
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs
Liabilities
Market risk benefit liabilities	$ (341)	$ (239)
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input	0.045	0.045
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | Corporate bonds
Assets
Fixed maturity AFS and trading securities, measurement input	0	(0.002)
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | State and municipal bonds
Assets
Fixed maturity AFS and trading securities, measurement input		0.009
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.015	0.018
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.021	0.023
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input	0.014	0.014
Significant Unobservable Inputs (Level 3) | Minimum | Lapse
Assets
Embedded derivative asset, measurement input	0	0
Liabilities
Embedded derivative liability, measurement input	0	0
Significant Unobservable Inputs (Level 3) | Minimum | Lapse | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Minimum | Lapse | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Minimum | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.85	0.85
Significant Unobservable Inputs (Level 3) | Minimum | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.85	0.85
Significant Unobservable Inputs (Level 3) | Minimum | Claims Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.60	0.60
Significant Unobservable Inputs (Level 3) | Minimum | Claims Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.60	0.60
Significant Unobservable Inputs (Level 3) | Minimum | Premiums Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.80	0.80
Significant Unobservable Inputs (Level 3) | Minimum | Premiums Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.80	0.80
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.0027	0.0051
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0027	0.0051
Significant Unobservable Inputs (Level 3) | Minimum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Minimum | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input	0.045	0.045
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | Corporate bonds
Assets
Fixed maturity AFS and trading securities, measurement input	0.042	0.037
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | State and municipal bonds
Assets
Fixed maturity AFS and trading securities, measurement input		0.022
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.015	0.018
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.021	0.023
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input	0.020	0.015
Significant Unobservable Inputs (Level 3) | Maximum | Lapse
Assets
Embedded derivative asset, measurement input	0.09	0.09
Liabilities
Embedded derivative liability, measurement input	0.09	0.09
Significant Unobservable Inputs (Level 3) | Maximum | Lapse | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.30	0.30
Significant Unobservable Inputs (Level 3) | Maximum | Lapse | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.30	0.30
Significant Unobservable Inputs (Level 3) | Maximum | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Maximum | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Maximum | Claims Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Maximum | Claims Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Maximum | Premiums Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	1.15	1.15
Significant Unobservable Inputs (Level 3) | Maximum | Premiums Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	1.15	1.15
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.0224	0.0213
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0224	0.0213
Significant Unobservable Inputs (Level 3) | Maximum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.29	0.29
Significant Unobservable Inputs (Level 3) | Maximum | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.29	0.29
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input	0.045	0.045
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | Corporate bonds
Assets
Fixed maturity AFS and trading securities, measurement input	0.020	0.021
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | State and municipal bonds
Assets
Fixed maturity AFS and trading securities, measurement input		0.021
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.015	0.018
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.021	0.023
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input	0.018	0.015
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.94	0.94
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.94	0.94
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.0181	0.0178
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0181	0.0178
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.1447	0.1392
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.1447	0.1392