Fair Value of Financial Instruments - Fair Value Inputs Quantitative Information (Details) $ in Millions	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Assets
Fixed maturity available-for-sale securities, at fair value	$ 81,880	$ 82,300
Market risk benefit assets	4,878	3,894
Liabilities
Market risk benefit liabilities	(1,266)	(1,716)
Corporate bonds
Assets
Fixed maturity available-for-sale securities, at fair value	63,290	63,866
State and municipal bonds
Assets
Fixed maturity available-for-sale securities, at fair value	2,493	2,542
CMBS
Assets
Fixed maturity available-for-sale securities, at fair value	1,403	1,344
ABS
Assets
Fixed maturity available-for-sale securities, at fair value	12,222	12,043
Hybrid and redeemable preferred securities
Assets
Fixed maturity available-for-sale securities, at fair value	228	232
Significant Unobservable Inputs (Level 3)
Assets
Equity securities	5	5
Market risk benefit assets	4,878	3,894
Liabilities
Embedded derivative liability	(10,803)	(9,013)
Market risk benefit liabilities	$ (1,266)	$ (1,716)
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input	0.045	0.045
Significant Unobservable Inputs (Level 3) | Minimum | Lapse
Liabilities
Embedded derivative liability, measurement input	0	0
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment
Assets
Equity securities, measurement input	0.045	0.045
Significant Unobservable Inputs (Level 3) | Maximum | Lapse
Liabilities
Embedded derivative liability, measurement input	0.09	0.09
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) | Corporate bonds
Assets
Fixed maturity available-for-sale securities, at fair value	$ 199	$ 183
Significant Unobservable Inputs (Level 3) | Corporate bonds | Minimum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	(0.001)	(0.002)
Significant Unobservable Inputs (Level 3) | Corporate bonds | Maximum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.038	0.037
Significant Unobservable Inputs (Level 3) | Corporate bonds | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.020	0.021
Significant Unobservable Inputs (Level 3) | State and municipal bonds
Assets
Fixed maturity available-for-sale securities, at fair value		$ 5
Significant Unobservable Inputs (Level 3) | State and municipal bonds | Minimum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input		0.009
Significant Unobservable Inputs (Level 3) | State and municipal bonds | Maximum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input		0.022
Significant Unobservable Inputs (Level 3) | State and municipal bonds | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input		0.021
Significant Unobservable Inputs (Level 3) | CMBS
Assets
Fixed maturity available-for-sale securities, at fair value	$ 8	$ 8
Significant Unobservable Inputs (Level 3) | CMBS | Minimum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.020	0.023
Significant Unobservable Inputs (Level 3) | CMBS | Maximum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.020	0.023
Significant Unobservable Inputs (Level 3) | CMBS | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.020	0.023
Significant Unobservable Inputs (Level 3) | ABS
Assets
Fixed maturity available-for-sale securities, at fair value	$ 11	$ 12
Significant Unobservable Inputs (Level 3) | ABS | Minimum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.016	0.018
Significant Unobservable Inputs (Level 3) | ABS | Maximum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.016	0.018
Significant Unobservable Inputs (Level 3) | ABS | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.016	0.018
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Assets
Fixed maturity available-for-sale securities, at fair value	$ 7	$ 7
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities | Minimum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.013	0.014
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities | Maximum | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.015	0.015
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities | Weighted Average Range | Liquidity/Duration Adjustment
Assets
Fixed maturity AFS and trading securities, measurement input	0.014	0.015
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs
Assets
Market risk benefit assets	$ 59	$ 274
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Minimum | Lapse
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Minimum | Utilization of GLB Withdrawls
Assets
Market risk benefit, measurement input	0.85	0.85
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Minimum | Claims Utilization Factor
Assets
Market risk benefit, measurement input	0.60	0.60
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Minimum | Premiums Utilization Factor
Assets
Market risk benefit, measurement input	0.80	0.80
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Minimum | Non-Performance Risk
Assets
Market risk benefit, measurement input	0.0031	0.0051
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Minimum | Volatility
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Maximum | Lapse
Assets
Market risk benefit, measurement input	0.30	0.30
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Maximum | Utilization of GLB Withdrawls
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Maximum | Claims Utilization Factor
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Maximum | Premiums Utilization Factor
Assets
Market risk benefit, measurement input	1.15	1.15
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Maximum | Non-Performance Risk
Assets
Market risk benefit, measurement input	0.0203	0.0213
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Maximum | Volatility
Assets
Market risk benefit, measurement input	0.29	0.29
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Weighted Average Range | Utilization of GLB Withdrawls
Assets
Market risk benefit, measurement input	0.94	0.94
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Weighted Average Range | Non-Performance Risk
Assets
Market risk benefit, measurement input	0.0162	0.0178
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs | Weighted Average Range | Volatility
Assets
Market risk benefit, measurement input	0.1414	0.1392
Significant Unobservable Inputs (Level 3) | Other assets - indexed annuity ceded embedded derivatives
Assets
Embedded derivative asset	$ 973	$ 940
Significant Unobservable Inputs (Level 3) | Other assets - indexed annuity ceded embedded derivatives | Minimum | Lapse
Assets
Embedded derivative asset, measurement input	0	0
Significant Unobservable Inputs (Level 3) | Other assets - indexed annuity ceded embedded derivatives | Maximum | Lapse
Assets
Embedded derivative asset, measurement input	0.09	0.09
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative
Assets
Embedded derivative asset	$ 201	$ 206
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative | Minimum | Lapse
Assets
Embedded derivative asset, measurement input	0.001	0.001
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative | Minimum | Non-Performance Risk
Assets
Embedded derivative asset, measurement input	0.0031	0.01
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative | Maximum | Lapse
Assets
Embedded derivative asset, measurement input	0.0200	0.0200
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative | Maximum | Non-Performance Risk
Assets
Embedded derivative asset, measurement input	0.0203	0.0213
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative | Weighted Average Range | Non-Performance Risk
Assets
Embedded derivative asset, measurement input	0.0141	0.0158
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs
Liabilities
Market risk benefit liabilities	$ (2,261)	$ (1,149)
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Minimum | Lapse
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Minimum | Utilization of GLB Withdrawls
Assets
Market risk benefit, measurement input	0.85	0.85
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Minimum | Claims Utilization Factor
Assets
Market risk benefit, measurement input	0.60	0.60
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Minimum | Premiums Utilization Factor
Assets
Market risk benefit, measurement input	0.80	0.80
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Minimum | Non-Performance Risk
Assets
Market risk benefit, measurement input	0.0031	0.0051
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Minimum | Volatility
Assets
Market risk benefit, measurement input	0.01	0.01
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Maximum | Lapse
Assets
Market risk benefit, measurement input	0.30	0.30
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Maximum | Utilization of GLB Withdrawls
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Maximum | Claims Utilization Factor
Assets
Market risk benefit, measurement input	1	1
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Maximum | Premiums Utilization Factor
Assets
Market risk benefit, measurement input	1.15	1.15
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Maximum | Non-Performance Risk
Assets
Market risk benefit, measurement input	0.0203	0.0213
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Maximum | Volatility
Assets
Market risk benefit, measurement input	0.29	0.29
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Weighted Average Range | Utilization of GLB Withdrawls
Assets
Market risk benefit, measurement input	0.94	0.94
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Weighted Average Range | Non-Performance Risk
Assets
Market risk benefit, measurement input	0.0162	0.0178
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs | Weighted Average Range | Volatility
Assets
Market risk benefit, measurement input	0.1414	0.1392