Fair Value of Financial Instruments - Quantitative Information Regarding Significant Unobservable Inputs Used for Recurring Level 3 Fair Value Measurements of Financial Instruments (Details) $ in Millions	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 8,759	$ 8,286
Liabilities, fair value	4,134	3,397
FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities, fair value	$ 3,821	$ 3,115
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Market Value of Option
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0000	0.0000
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Swap rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0381	0.0388
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Mortality Multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	1.0000	1.0000
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0025	0.0025
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0200	0.0200
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0055	0.0048
Minimum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Option cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0007	0.0007
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Market Value of Option
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.3003	0.2390
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Swap rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0547	0.0473
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Mortality Multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	1.0000	1.0000
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.7000	0.7000
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.3448	0.2941
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0137	0.0144
Maximum \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Option cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0567	0.0497
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Market Value of Option
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0236	0.8700
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Swap rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0464	0.0431
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Mortality Multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	1.0000	1.0000
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0661	0.0657
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0274	0.0273
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0117	0.0130
Weighted Average \| FIA/ IUL embedded derivatives, included in contractholder funds \| Discounted Cash Flow \| Option cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0222	0.0189
Asset-backed securities \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 6,233	$ 5,916
Asset-backed securities \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 277	$ 347
Asset-backed securities \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.547	0.5285
Asset-backed securities \| Minimum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.3965	0.4143
Asset-backed securities \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.7190	1.1717
Asset-backed securities \| Maximum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0177	2.1050
Asset-backed securities \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9428	0.9418
Asset-backed securities \| Weighted Average \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.6208	0.6799
Commercial mortgage-backed securities \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value		$ 20
Commercial mortgage-backed securities \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 17	$ 17
Commercial mortgage-backed securities \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities		1.0902
Commercial mortgage-backed securities \| Minimum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.8476	0.7466
Commercial mortgage-backed securities \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities		1.0902
Commercial mortgage-backed securities \| Maximum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.7935	0.8848
Commercial mortgage-backed securities \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities		1.0902
Commercial mortgage-backed securities \| Weighted Average \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.8861	0.8274
Corporates \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 789	$ 602
Corporates \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	829	826
Corporates \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 10	$ 12
Corporates \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.4639	0.7916
Corporates \| Minimum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0000	0.0000
Corporates \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.4400	0.4400
Corporates \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0474	1.0253
Corporates \| Maximum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0312	1.0496
Corporates \| Maximum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0000	1.0000
Corporates \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9587	0.9416
Corporates \| Weighted Average \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.8985	0.8969
Corporates \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.7480	0.7702
Municipals \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 18
Municipals \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 31	$ 29
Municipals \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0120
Municipals \| Minimum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0211	0.9395
Municipals \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0120
Municipals \| Maximum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0211	0.9395
Municipals \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0120
Municipals \| Weighted Average \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	1.0211	0.9395
Residential mortgage-backed securities \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 25	$ 302
Residential mortgage-backed securities \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 3
Debt securities	0.9311
Residential mortgage-backed securities \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0000	0.0000
Residential mortgage-backed securities \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9045	0.9104
Residential mortgage-backed securities \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9000	0.8638
Foreign Governments \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 16	$ 16
Foreign Governments \| Minimum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9904	0.9978
Foreign Governments \| Maximum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9968	1.0229
Foreign Governments \| Weighted Average \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9924	1.0056
Short term investments \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 126
Short term investments \| Minimum \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short term investments	1.0000
Short term investments \| Maximum \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short term investments	1.0002
Short term investments \| Weighted Average \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Short term investments	1.0001
Preferred securities \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities		1.0000
Preferred securities \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	21.25
Preferred securities \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	1.0000
Preferred securities \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	21.25
Preferred securities \| Maximum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	1.0000
Preferred securities \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	21.25
Preferred securities \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	1.0000
Preferred securities \| Affiliated Entity \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 6
Preferred securities \| Affiliated Entity \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 1	$ 1
Equity securities \| Minimum \| Broker quoted/Market Comparable \| EBITDA multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	5.3	5.6
Equity securities \| Maximum \| Broker quoted/Market Comparable \| EBITDA multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	5.3	5.6
Equity securities \| Weighted Average \| Broker quoted/Market Comparable \| EBITDA multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	5.3	5.6
Equity securities \| Affiliated Entity \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 7	$ 6
Equity securities \| Affiliated Entity \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 7	$ 4
Equity securities \| Affiliated Entity \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	66.00	64.25
Equity securities \| Affiliated Entity \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	0.1260	0.1110
Equity securities \| Affiliated Entity \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	66.00	64.25
Equity securities \| Affiliated Entity \| Maximum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	0.1260	0.1110
Equity securities \| Affiliated Entity \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	66.00	64.25
Equity securities \| Affiliated Entity \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	0.1260	0.1110
Available-for-sale embedded derivative \| Black Scholes model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 26	$ 23
Available-for-sale embedded derivative \| Black Scholes model \| Market Value of Fund
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative asset	1.0000	1.0000
Secured borrowing receivable \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 10	$ 10
Secured borrowing receivable \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Secured borrowing receivable	1.0000	1.0000
Secured borrowing receivable \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Secured borrowing receivable	1.0000	1.0000
Secured borrowing receivable \| Weighted Average \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Secured borrowing receivable	1.0000	1.0000
Credit linked note \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 13	$ 15
Credit linked note \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Credit Linked Note	0.9699	0.9623
Investment in unconsolidated affiliates \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 197	$ 23
Investment in unconsolidated affiliates \| Minimum \| EBITDA multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in affiliate	5
Investment in unconsolidated affiliates \| Minimum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in affiliate		5
Investment in unconsolidated affiliates \| Maximum \| EBITDA multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in affiliate	14
Investment in unconsolidated affiliates \| Maximum \| Broker quoted/Market Comparable \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in affiliate		5.50
Investment in unconsolidated affiliates \| Weighted Average \| EBITDA multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in affiliate	12.1
Market risk benefits asset \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 118	$ 117
Market risk benefits asset \| Minimum \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0025	0.0025
Market risk benefits asset \| Minimum \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0200	0.0200
Market risk benefits asset \| Minimum \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0055	0.0048
Market risk benefits asset \| Minimum \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.0000	1.0000
Market risk benefits asset \| Minimum \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.5000	0.5000
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.1000	0.1000
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.2174	0.2174
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0137	0.0144
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.0000	1.0000
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.6000	0.6000
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0503	0.0469
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0249	0.0249
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0117	0.0130
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.0000	1.0000
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.5085	0.5094
Market risk benefits liability \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities, fair value	$ 313	$ 282
Market risk benefits liability \| Minimum \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0025	0.0025
Market risk benefits liability \| Minimum \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0200	0.0200
Market risk benefits liability \| Minimum \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0055	0.0048
Market risk benefits liability \| Minimum \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.0000	1.0000
Market risk benefits liability \| Minimum \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.5000	0.5000
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.1000	0.1000
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.2174	0.2174
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0137	0.0144
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.0000	1.0000
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.6000	0.6000
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0503	0.0469
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0249	0.0249
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0117	0.0130
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.0000	1.0000
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.5089	0.5094

Fair Value of Financial Instruments - Quantitative Information Regarding Significant Unobservable Inputs Used for Recurring Level 3 Fair Value Measurements of Financial Instruments (Details)
$ in Millions