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Fair Value of Financial Instruments (Fair Value Inputs Quantitative Information) (Details) $ in Millions | Mar. 31, 2023 USD ($) item | Dec. 31, 2022 USD ($) item
--- | --- | ---
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | $ 270,220 | $ 261,515
Market risk benefit assets | $ | 3,445 | 2,807
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ | (11,857) | (10,335)
Market risk benefit liabilities | $ | 1,976 | $ 2,078
Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Maximum [Member] | Equity Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Equity securities, measurement input |  | 4.5
Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Weighted Average [Member] | Equity Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Equity securities, measurement input |  | 4.5
Significant Unobservable Inputs (Level 3) [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | 8,872 | $ 8,667
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ | (8,503) | (7,669)
Significant Unobservable Inputs (Level 3) [Member] | MRB Assets [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | 3,445 | $ 2,807
Significant Unobservable Inputs (Level 3) [Member] | Ceded MRBs [Member] | Other Assets [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | 6 |
Significant Unobservable Inputs (Level 3) [Member] | Ceded MRBs [Member] | Minimum [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 0.35
Significant Unobservable Inputs (Level 3) [Member] | Ceded MRBs [Member] | Maximum [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 2.41
Significant Unobservable Inputs (Level 3) [Member] | Ceded MRBs [Member] | Weighted Average [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 1.73
Significant Unobservable Inputs (Level 3) [Member] | MRB Liabilities [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ | (1,976) | $ (2,078)
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Corporate Bonds [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | 228 | 204
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | State And Municipal Bonds [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | 36 | 35
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | ABS [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | 13 | 15
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Hybrid And Redeemable Preferred Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | $ 3 | 3
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Equity Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ |  | $ 4
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Minimum [Member] | Corporate Bonds [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | (0.2) | (0.2)
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Minimum [Member] | State And Municipal Bonds [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 1.5 | 1.2
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Minimum [Member] | ABS [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 2.5 | 1.4
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Minimum [Member] | Hybrid And Redeemable Preferred Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 1.2 | 1.5
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Minimum [Member] | Equity Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Equity securities, measurement input |  | 4.5
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Maximum [Member] | Corporate Bonds [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 4.5 | 4.2
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Maximum [Member] | State And Municipal Bonds [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 2.5 | 2.4
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Maximum [Member] | ABS [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 2.5 | 1.4
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Maximum [Member] | Hybrid And Redeemable Preferred Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 1.2 | 1.5
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Weighted Average [Member] | Corporate Bonds [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 2.4 | 2.1
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Weighted Average [Member] | State And Municipal Bonds [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 2.5 | 2.3
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Weighted Average [Member] | ABS [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 2.5 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Fixed Maturity AFS Securities [Member] | Weighted Average [Member] | Hybrid And Redeemable Preferred Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Fixed maturity AFS and trading securities, measurement input | 1.2 | 1.5
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Equity Securities [Member] | Equity Securities [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | $ 4 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Equity Securities [Member] | Minimum [Member] | Equity Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Equity securities, measurement input | 4.5 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Equity Securities [Member] | Maximum [Member] | Equity Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Equity securities, measurement input | 4.5 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Equity Securities [Member] | Weighted Average [Member] | Equity Securities [Member] | Liquidity/Duration Adjustment [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Equity securities, measurement input | 4.5 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Other Assets [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ |  | $ 12
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 1
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 85
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 60
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 80
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 1
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Assets [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 1 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Assets [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 85 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Assets [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 60 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Assets [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 80 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Assets [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 0.79 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Assets [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 1 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 30
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 100
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 100
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 115
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 28
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Assets [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 30 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Assets [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 100 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Assets [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 100 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Assets [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 115 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Assets [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 3.27 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Assets [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 28 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 94
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 14.47
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Other Assets [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 94 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Other Assets [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 2.59 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Other Assets [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 14.82 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ |  | $ 525
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Other Assets [Member] |  |
Assets Fair Value Disclosure [Abstract] |  |
Assets Fair Value Disclosure | $ | $ 305 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Minimum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 0
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Minimum [Member] | Other Assets [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 0 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Maximum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input |  | 9
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Maximum [Member] | Other Assets [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative assets, measurement input | 9 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Future contract benefits - indexed annuity and IUL contracts embedded derivatives [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ |  | $ (4,845)
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Future contract benefits - indexed annuity and IUL contracts embedded derivatives [Member] | Minimum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 0
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Future contract benefits - indexed annuity and IUL contracts embedded derivatives [Member] | Maximum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 9
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Future contract benefits - indexed annuity and IUL contracts embedded derivatives [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Future Contract Benefits [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ | $ (5,788) |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Future contract benefits - indexed annuity and IUL contracts embedded derivatives [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Minimum [Member] | Future Contract Benefits [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 0 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Future contract benefits - indexed annuity and IUL contracts embedded derivatives [Member] | Indexed Annuity Ceded Embedded Derivatives [Member] | Maximum [Member] | Future Contract Benefits [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 9 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ | $ (252) |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Other Liabilities [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Liabilities measured at fair value | $ |  | $ (205)
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 1
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 85
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 60
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 80
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 0.35
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 1
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Liabilities [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 1 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Liabilities [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 85 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Liabilities [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 60 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Liabilities [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 80 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Liabilities [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 0.79 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Minimum [Member] | Other Liabilities [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 1 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 30
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 100
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 100
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 115
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 2.41
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 28
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Liabilities [Member] | Long-Term Lapse Rate [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | (30) |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Liabilities [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 100 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Liabilities [Member] | Claims Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 100 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Liabilities [Member] | Premiums Utilization Factor [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 115 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Liabilities [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 3.27 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Maximum [Member] | Other Liabilities [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 28 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 94
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 1.73
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input |  | 14.47
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Other Liabilities [Member] | Utilization Of Guaranteed Withdrawals [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 94 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Other Liabilities [Member] | NPR [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 2.59 |
Significant Unobservable Inputs (Level 3) [Member] | Discounted Cash Flow Valuation Technique [Member] | Ceded MRBs [Member] | Weighted Average [Member] | Other Liabilities [Member] | Volatility [Member] |  |
Liabilities Fair Value Disclosure [Abstract] |  |
Derivative liability, measurement input | 14.82 |

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