v3.26.1
Fair Value (Quantitative Information) (Details)
Mar. 31, 2026
Dec. 31, 2025
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 0 - 40    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0001 0.0001
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 41 - 60    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0005 0.0005
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 61 - 115    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0035 0.0035
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 1 - 10    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0080 0.0080
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 11 - 20    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0330 0.0330
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 21 - 116    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0120 0.0120
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Utilization Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0020 0.0020
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Withdrawal Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0 0
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Long-Term Equity Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.1687 0.1687
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Nonperformance risk spread    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0037 0.0033
Minimum | U.S. corporate and foreign corporate | Valuation Technique, Matrix Pricing | Measurement Input, Offered Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 17 32
Minimum | U.S. corporate and foreign corporate | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0 0
Minimum | RMBS | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 32 33
Minimum | ABS & CLO | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 0 23
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 0 - 40    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0013 0.0013
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 41 - 60    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0068 0.0068
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 61 - 115    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 1 1
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 1 - 10    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.2010 0.2010
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 11 - 20    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.1055 0.1055
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 21 - 116    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.1055 0.1055
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Utilization Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.1625 0.1625
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Withdrawal Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0775 0.0775
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Long-Term Equity Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.2249 0.2249
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Nonperformance risk spread    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0076 0.0065
Maximum | U.S. corporate and foreign corporate | Valuation Technique, Matrix Pricing | Measurement Input, Offered Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 124 127
Maximum | U.S. corporate and foreign corporate | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 101 100
Maximum | RMBS | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 151 114
Maximum | ABS & CLO | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 166 142
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 0 - 40    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0005 0.0005
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 41 - 60    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0022 0.0022
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Mortality rates: Ages 61 - 115    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0123 0.0123
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 1 - 10    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.1337 0.1337
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 11 - 20    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0817 0.0817
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Lapse rates: Durations 21 - 116    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0748 0.0748
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Utilization Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0054 0.0054
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Withdrawal Rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0492 0.0492
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Long-Term Equity Volatility    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.1896 0.1896
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Measurement Input, Nonperformance risk spread    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
MRBs and Reinsured MRBs direct, assumed and ceded guaranteed minimum benefits 0.0058 0.0058
Weighted Average | U.S. corporate and foreign corporate | Valuation Technique, Matrix Pricing | Measurement Input, Offered Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 95 96
Weighted Average | U.S. corporate and foreign corporate | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 94 89
Weighted Average | RMBS | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 97 96
Weighted Average | ABS & CLO | Valuation Technique, Market Approach | Measurement Input, Quoted Price    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Securities, Available-for-sale, Measurement Input 99 100