Fair Value (Quantitative Information) (Details)	Mar. 31, 2025	Dec. 31, 2024
Minimum | Foreign currency exchange rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	111	131
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	0
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	0.0004	0.0004
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	0
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	0.0014	0.0014
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	0.0039	0.0039
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	0.0039	0.0039
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	0.1423	0.1423
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	0.0012	0.0011
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	46	47
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	32	13
Minimum | U.S. corporate and foreign corporate | Valuation Technique, Consensus Pricing Model | Measurement Input, Offered Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Measurement Input	47	47
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	34	0
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	3	4
Maximum | Foreign currency exchange rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	189	230
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	0.0015	0.0015
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	0.0079	0.0079
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	0.15	0.15
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	0.15	0.15
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	0.22
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	0.20	0.20
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	0.2227	0.2227
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	0.0156	0.0146
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	125	126
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	100	102
Maximum | U.S. corporate and foreign corporate | Valuation Technique, Consensus Pricing Model | Measurement Input, Offered Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Measurement Input	100	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	131	128
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	194	113
Weighted Average | Foreign currency exchange rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	177	222
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	0.0114	0.0114
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	0.1286	0.1286
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	0.0605	0.0605
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	0.0820	0.0820
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	0.0079	0.0079
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	0.0477	0.0477
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	0.1877	0.1877
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	0.0064	0.0064
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	92	92
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	96	95
Weighted Average | U.S. corporate and foreign corporate | Valuation Technique, Consensus Pricing Model | Measurement Input, Offered Price
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt Securities, Available-for-sale, Measurement Input	94	96
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	95	95
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	97