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Market Risk Benefits - Unobservable Inputs for Fair Value Measurement (Details) - Retirement and Income Solutions - Individual variable annuities | Sep. 30, 2025 | Dec. 31, 2024
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Minimum | Long-term interest rate |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0471 | 0.0478
Minimum | Long-term equity market volatility |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.178 | 0.181
Minimum | Nonperformance risk |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0043 | 0.004
Minimum | Lapse rate |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.009 | 0.009
Maximum | Long-term interest rate |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0473 | 0.0485
Maximum | Long-term equity market volatility |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.3841 | 0.3553
Maximum | Nonperformance risk |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0103 | 0.011
Maximum | Lapse rate |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.55 | 0.55
Weighted average input | Long-term interest rate |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0472 | 0.0481
Weighted average input | Long-term equity market volatility |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.22 | 0.2176
Weighted average input | Nonperformance risk |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0087 | 0.0089
Weighted average input | Lapse rate |  |
Unobservable Inputs for Fair Value Measurement |  |
Market risk benefits, measurement input | 0.0626 | 0.0579

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