Market Risk Benefits - Significant Inputs and Assumptions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Market Risk Benefit [Line Items]
Market risk benefits	$ (1,092)	$ (919)	$ 335	$ 1,103
Utilization of guaranteed withdrawals
Market Risk Benefit [Line Items]
Increase (decrease) in net income from change in assumptions	(14)	(15)
Surrender rate
Market Risk Benefit [Line Items]
Increase (decrease) in net income from change in assumptions	$ (70)	$ (83)
Discounted cash flow \| Nonperformance risk
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.0065	0.0065
Minimum \| Discounted cash flow \| Utilization of guaranteed withdrawals
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.000	0.000
Minimum \| Discounted cash flow \| Surrender rate
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.004	0.004
Minimum \| Discounted cash flow \| Market volatility
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.000	0.000
Minimum \| Discounted cash flow \| Mortality rate
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.000	0.000
Maximum \| Discounted cash flow \| Utilization of guaranteed withdrawals
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.528	0.528
Maximum \| Discounted cash flow \| Surrender rate
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.750	0.750
Maximum \| Discounted cash flow \| Market volatility
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.249	0.246
Maximum \| Discounted cash flow \| Mortality rate
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.416	0.416
Weighted Average \| Discounted cash flow \| Utilization of guaranteed withdrawals
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.122	0.119
Weighted Average \| Discounted cash flow \| Surrender rate
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.036	0.033
Weighted Average \| Discounted cash flow \| Market volatility
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.112	0.103
Weighted Average \| Discounted cash flow \| Nonperformance risk
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.0065	0.0065
Weighted Average \| Discounted cash flow \| Mortality rate
Market Risk Benefit [Line Items]
Market risk benefits, measurement input	0.018	0.017