Fair Value of Financial Instruments - Fair Value Inputs Quantitative Information (Details) $ in Millions	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Assets
Fair Value	$ 90,680	$ 87,111
Market risk benefit assets	4,694	4,860
Liabilities
Market risk benefit liabilities	(1,190)	(1,046)
Corporate bonds
Assets
Fair Value	68,351	66,450
ABS
Assets
Fair Value	14,706	13,880
CMBS
Assets
Fair Value	2,150	1,665
Hybrid and redeemable preferred securities
Assets
Fair Value	257	254
Significant Unobservable Inputs (Level 3)
Assets
Equity securities	5	5
Market risk benefit assets	4,694	4,860
Embedded derivative asset	1,333	1,115
Liabilities
Embedded derivative liability	(14,829)	(12,402)
Market risk benefit liabilities	(1,190)	(1,046)
Significant Unobservable Inputs (Level 3) | Corporate bonds
Assets
Fair Value	248	187
Significant Unobservable Inputs (Level 3) | ABS
Assets
Fair Value	8	8
Significant Unobservable Inputs (Level 3) | CMBS
Assets
Fair Value	42	10
Significant Unobservable Inputs (Level 3) | Hybrid and redeemable preferred securities
Assets
Fair Value	40	19
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	$ (349)	$ (381)
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	0.000	0.000
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.014	0.019
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.017	0.013
Significant Unobservable Inputs (Level 3) | Minimum | Liquidity/Duration Adjustment | Hybrid and redeemable preferred securities
Assets
Fixed maturity AFS and trading securities, measurement input	0.010	0.014
Significant Unobservable Inputs (Level 3) | Minimum | Lapse
Assets
Embedded derivative asset, measurement input	0.000	0.000
Liabilities
Embedded derivative liability, measurement input	0.000	0.000
Significant Unobservable Inputs (Level 3) | Minimum | Lapse | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.010	0.010
Significant Unobservable Inputs (Level 3) | Minimum | Lapse | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.010	0.010
Significant Unobservable Inputs (Level 3) | Minimum | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.850	0.850
Significant Unobservable Inputs (Level 3) | Minimum | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.850	0.850
Significant Unobservable Inputs (Level 3) | Minimum | Claims Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.500	0.600
Significant Unobservable Inputs (Level 3) | Minimum | Claims Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.500	0.600
Significant Unobservable Inputs (Level 3) | Minimum | Premiums Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.800	0.800
Significant Unobservable Inputs (Level 3) | Minimum | Premiums Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.800	0.800
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.002	0.003
Significant Unobservable Inputs (Level 3) | Minimum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.002	0.003
Significant Unobservable Inputs (Level 3) | Minimum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.010	0.010
Significant Unobservable Inputs (Level 3) | Minimum | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.010	0.010
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	0.052	0.031
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.014	0.019
Significant Unobservable Inputs (Level 3) | Maximum | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.018	0.013
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	0.019
Significant Unobservable Inputs (Level 3) | Maximum | Lapse
Assets
Embedded derivative asset, measurement input	0.090	0.090
Liabilities
Embedded derivative liability, measurement input	0.090	0.090
Significant Unobservable Inputs (Level 3) | Maximum | Lapse | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.300	0.300
Significant Unobservable Inputs (Level 3) | Maximum | Lapse | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.300	0.300
Significant Unobservable Inputs (Level 3) | Maximum | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	1.000	1.000
Significant Unobservable Inputs (Level 3) | Maximum | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	1.000	1.000
Significant Unobservable Inputs (Level 3) | Maximum | Claims Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	1.000	1.000
Significant Unobservable Inputs (Level 3) | Maximum | Claims Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	1.000	1.000
Significant Unobservable Inputs (Level 3) | Maximum | Premiums Utilization Factor | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	1.150	1.150
Significant Unobservable Inputs (Level 3) | Maximum | Premiums Utilization Factor | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	1.150	1.150
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.018	0.020
Significant Unobservable Inputs (Level 3) | Maximum | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.018	0.020
Significant Unobservable Inputs (Level 3) | Maximum | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.270	0.290
Significant Unobservable Inputs (Level 3) | Maximum | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.270	0.290
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	0.017
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | ABS
Assets
Fixed maturity AFS and trading securities, measurement input	0.014	0.019
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Liquidity/Duration Adjustment | CMBS
Assets
Fixed maturity AFS and trading securities, measurement input	0.018	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	0.018
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.930	0.920
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Utilization of GLB Withdrawls | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.930	0.920
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.014	0.016
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Non-Performance Risk | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.014	0.016
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other assets – ceded MRBs
Assets
Market risk benefit, measurement input	0.151	0.145
Significant Unobservable Inputs (Level 3) | Weighted Average Range | Volatility | Other liabilities – ceded MRBs
Assets
Market risk benefit, measurement input	0.151	0.145