Fair Value of Financial Instruments - Fair Value Inputs Quantitative Information (Details) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Assets
Fixed maturity available-for-sale securities, at fair value	$ 81,900	$ 82,300
Market risk benefit assets	4,860	3,894
Liabilities
Market risk benefit liabilities	(1,046)	(1,716)
Corporate bonds
Assets
Fixed maturity available-for-sale securities, at fair value	61,833	63,866
State and municipal bonds
Assets
Fixed maturity available-for-sale securities, at fair value	2,148	2,542
CMBS
Assets
Fixed maturity available-for-sale securities, at fair value	1,583	1,344
ABS
Assets
Fixed maturity available-for-sale securities, at fair value	13,769	12,043
Hybrid and redeemable preferred securities
Assets
Fixed maturity available-for-sale securities, at fair value	241	$ 232
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		0.0051
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		0.0213
Maximum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.29
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		0.0178
Weighted Average Range | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input		0.1392
Significant Unobservable Inputs (Level 3)
Assets
Equity securities	5	$ 5
Market risk benefit assets	4,860	3,894
Liabilities
Embedded derivative liability	(12,402)	(9,013)
Market risk benefit liabilities	(1,046)	(1,716)
Significant Unobservable Inputs (Level 3) | Corporate bonds
Assets
Fixed maturity available-for-sale securities, at fair value	185	183
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) | CMBS
Assets
Fixed maturity available-for-sale securities, at fair value	8	8
Significant Unobservable Inputs (Level 3) | ABS
Assets
Fixed maturity available-for-sale securities, at fair value	10	12
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Assets
Fixed maturity available-for-sale securities, at fair value	19	7
Significant Unobservable Inputs (Level 3) | Other assets – ceded MRBs
Assets
Market risk benefit assets	14	274
Significant Unobservable Inputs (Level 3) | Other assets - indexed annuity ceded embedded derivatives
Assets
Embedded derivative asset	1,970	940
Significant Unobservable Inputs (Level 3) | Other assets - LPR ceded derivative
Assets
Embedded derivative asset	190	206
Significant Unobservable Inputs (Level 3) | Other liabilities – ceded MRBs
Liabilities
Market risk benefit liabilities	$ (2,763)	$ (1,149)
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		0.021
Significant Unobservable Inputs (Level 3) | Liquidity/Duration Adjustment | CMBS
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		0.018
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		0.0158
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 | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.019	0.023
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.013	0.018
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
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	0.001
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	0.0025
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0025	0.0051
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0025	0.0051
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	0.031	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 | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.019	0.023
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.013	0.018
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input	0.019	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	0.0200
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	0.0200
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0200	0.0213
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0200	0.0213
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	0.29
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	0.017
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.019
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.013
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
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.92
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.92	0.94
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.0158
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other assets - LPR ceded derivative
Assets
Embedded derivative asset, measurement input	0.0140
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.0158	0.0178
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.1450
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.1450	0.1392