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