Fair Value of Financial Instruments - Fair Value Inputs Quantitative Information (Details)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Assets
Fixed maturity available-for-sale securities, at fair value	$ 82,300,000,000	$ 99,465,000,000
Market risk benefit assets	3,894,000,000	2,807,000,000
Liabilities
Market risk benefit liabilities	(1,716,000,000)	(2,078,000,000)
Corporate bonds
Assets
Fixed maturity available-for-sale securities, at fair value	63,866,000,000	79,166,000,000
State and municipal bonds
Assets
Fixed maturity available-for-sale securities, at fair value	2,542,000,000	4,885,000,000
CMBS
Assets
Fixed maturity available-for-sale securities, at fair value	1,344,000,000	1,667,000,000
ABS
Assets
Fixed maturity available-for-sale securities, at fair value	12,043,000,000	10,899,000,000
Hybrid and redeemable preferred securities
Assets
Fixed maturity available-for-sale securities, at fair value	232,000,000	$ 350,000,000
Minimum | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.85
Minimum | Claims Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.60
Minimum | Premiums Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.80
Minimum | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.0035
Minimum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.01
Maximum | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		1
Maximum | Claims Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		1
Maximum | Premiums Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		1.15
Maximum | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.0241
Maximum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.28
Weighted Average Range | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.94
Weighted Average Range | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.0173
Weighted Average Range | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.1447
Significant Unobservable Inputs (Level 3)
Assets
Equity securities	5,000,000	$ 4,000,000
Market risk benefit assets	3,894,000,000	2,807,000,000
Liabilities
Embedded derivative liability	(9,013,000,000)	(4,845,000,000)
Market risk benefit liabilities	(1,716,000,000)	(2,078,000,000)
Significant Unobservable Inputs (Level 3) | Corporate bonds
Assets
Fixed maturity available-for-sale securities, at fair value	183,000,000	201,000,000
Significant Unobservable Inputs (Level 3) | State and municipal bonds
Assets
Fixed maturity available-for-sale securities, at fair value	5,000,000	35,000,000
Significant Unobservable Inputs (Level 3) | CMBS
Assets
Fixed maturity available-for-sale securities, at fair value	8,000,000
Significant Unobservable Inputs (Level 3) | ABS
Assets
Fixed maturity available-for-sale securities, at fair value	12,000,000	15,000,000
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Assets
Fixed maturity available-for-sale securities, at fair value	7,000,000	3,000,000
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs
Assets
Market risk benefit assets	274,000,000	540,000,000
Significant Unobservable Inputs (Level 3) | Other assets - indexed annuity ceded embedded derivatives
Assets
Embedded derivative asset	940,000,000	525,000,000
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative
Assets
Embedded derivative asset	206,000,000	212,000,000
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs
Liabilities
Market risk benefit liabilities	$ (1,149,000,000)	$ (246,000,000)
Significant Unobservable Inputs (Level 3) | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input		0.045
Significant Unobservable Inputs (Level 3) | Liquidity/Duration Adjustment | Corporate bonds
Assets
Fixed maturity AFS and trading securities, measurement input		0.021
Significant Unobservable Inputs (Level 3) | Liquidity/Duration Adjustment | State and municipal bonds
Assets
Fixed maturity AFS and trading securities, measurement input		0.023
Significant Unobservable Inputs (Level 3) | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input		0.014
Significant Unobservable Inputs (Level 3) | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input		0.015
Significant Unobservable Inputs (Level 3) | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input		0.0175
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	(0.002)	(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	0.012
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.023
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.018	0.014
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	0.015
Significant Unobservable Inputs (Level 3) | Minimum | Lapse
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 assets - indexed annuity ceded embedded derivatives
Assets
Embedded derivative asset, measurement input	0	0
Significant Unobservable Inputs (Level 3) | Minimum | Lapse | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.001	0
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
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
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
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	0.0051
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0051	0.0035
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0051	0.0035
Significant Unobservable Inputs (Level 3) | Minimum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	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	0.037	0.042
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | State and municipal bonds
Assets
Fixed maturity AFS and trading securities, measurement input	0.022	0.024
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.023
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.018	0.014
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input	0.015	0.015
Significant Unobservable Inputs (Level 3) | Maximum | Lapse
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 assets - indexed annuity ceded embedded derivatives
Assets
Embedded derivative asset, measurement input	0.09	0.09
Significant Unobservable Inputs (Level 3) | Maximum | Lapse | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0200	0.0155
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
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
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
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	0.0213
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0213	0.0241
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0213	0.0241
Significant Unobservable Inputs (Level 3) | Maximum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.29
Significant Unobservable Inputs (Level 3) | Maximum | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.29	0.28
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input	0.045
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | Corporate bonds
Assets
Fixed maturity AFS and trading securities, measurement input	0.021
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 | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.023
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.018
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	0.015
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.94
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	0.0178
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0158
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0178	0.0173
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.1392
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.1392	0.1447