Fair Value (Quantitative Information) (Details)	Sep. 30, 2023	Dec. 31, 2022
Minimum | Interest rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	433	372
Minimum | Foreign currency exchange rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	216	74
Minimum | Credit | Measurement Input, Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0	84
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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0004	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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0	0.0023
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0039	0.0040
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0039	0.0049
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0010	0.0049
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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0792	0.0826
Minimum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Nonperformance risk spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0041	0.0034
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	13	0
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	4	20
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	84	5
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	0	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	3
Maximum | Interest rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	462	392
Maximum | Foreign currency exchange rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	415	1,938
Maximum | Credit | Measurement Input, Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0	138
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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0075	0.0075
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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.2010	0.3750
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.15	0.3575
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.15	0.3575
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.22	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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.2185	0.2201
Maximum | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Nonperformance risk spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0179	0.0177
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	120	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	127	109
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	101	99
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	112	106
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	100	102
Weighted Average | Interest rate | Measurement Input, Swap Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	451	381
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	244	208
Weighted Average | Credit | Measurement Input, Credit Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative Asset (Liability) Net, Measurement Input	0	101
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]
Market Risk Benefits and Reinsured Market Risk Benefits 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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0022	0.0020
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0123	0.0144
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0872	0.0896
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0434	0.0652
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0459	0.0289
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0044	0.0038
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0447	0.0402
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]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.1855	0.1849
Weighted Average | Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits | Nonperformance risk spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market Risk Benefits and Reinsured Market Risk Benefits direct, assumed and ceded guaranteed minimum benefits	0.0073	0.0075
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	86	87
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	90	90
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	95	93
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	93	93
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	92	91