Fair Value of Financial Instruments - Schedule of Quantitative Information Regarding Significant Unobservable Inputs Used for Recurring Level 3 Fair Value Measurements of Financial Instruments (Details) $ in Millions	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 1,486	$ 1,433
Liabilities, fair value	6,505	5,843
Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	11,784	10,301
Liabilities, fair value	5
Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities, fair value	$ 5,727	$ 5,220
Minimum \| Indexed annuities/ 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 \| Indexed annuities/ 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 \| Indexed annuities/ 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	0.0048	0.0048
Minimum \| Indexed annuities/ 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 \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Mortality Multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.8000	0.8000
Minimum \| Indexed annuities/ 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 \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.5000	0.5000
Maximum \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.3704	0.3571
Maximum \| Indexed annuities/ 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	0.0095	0.0095
Maximum \| Indexed annuities/ 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	0.2078	0.2081
Maximum \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Mortality Multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	1.1500	1.1500
Maximum \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Option Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0570	0.0570
Weighted Average \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0655	0.0694
Weighted Average \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0271	0.0272
Weighted Average \| Indexed annuities/ 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	0.0075	0.0075
Weighted Average \| Indexed annuities/ 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	0.0276	0.0292
Weighted Average \| Indexed annuities/ 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 \| Indexed annuities/ IUL embedded derivatives, included in Contractholder funds \| Discounted Cash Flow \| Option Cost
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability	0.0275	0.0268
Asset-backed securities \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 111	$ 95
Asset-backed securities \| Minimum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0527	0.0483
Asset-backed securities \| Maximum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0743	0.0715
Asset-backed securities \| Weighted Average \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0645	0.0633
Corporates \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 672	$ 750
Corporates \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 9	$ 7
Corporates \| Minimum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0385	0.0200
Corporates \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.1333	0.1333
Corporates \| Maximum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.2339	0.2253
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 \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0641	0.0676
Corporates \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.9722	0.9645
Municipals \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 3
Municipals \| Minimum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0536
Municipals \| Maximum \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0536
Municipals \| Weighted Average \| Third-Party Valuation \| Offered Quotes
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0536
Residential mortgage-backed securities \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 3	$ 3
Residential mortgage-backed securities \| Minimum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0570	0.0589
Residential mortgage-backed securities \| Maximum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0570	0.0589
Residential mortgage-backed securities \| Weighted Average \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0570	0.0589
Foreign Governments \| Third-Party Valuation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 4	$ 4
Foreign Governments \| Minimum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0907	0.1214
Foreign Governments \| Maximum \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0907	0.1214
Foreign Governments \| Weighted Average \| Third-Party Valuation \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Debt securities	0.0907	0.1214
Preferred securities \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value		$ 1
Preferred securities \| Affiliated Entity \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 1
Preferred securities \| Affiliated Entity \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	1.0000	1.0000
Preferred securities \| Affiliated Entity \| Maximum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	1.0000	1.0000
Preferred securities \| Affiliated Entity \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	1.0000	1.0000
Equity securities \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value		$ 4
Equity securities \| Minimum \| Broker quoted/Market Comparable \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	5.6	5.8
Equity securities \| Maximum \| Broker quoted/Market Comparable \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	5.6	7.5
Equity securities \| Weighted Average \| Broker quoted/Market Comparable \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	5.6	7.0
Equity securities \| Affiliated Entity \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 4
Equity securities \| Affiliated Entity \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	0.1410	0.0480
Equity securities \| Affiliated Entity \| Maximum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	0.1410	0.1410
Equity securities \| Affiliated Entity \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Preferred/Equity securities	0.1410	0.0940
Investment in unconsolidated affiliates \| Broker quoted/Market Comparable
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 272	$ 272
Investment in unconsolidated affiliates \| Minimum \| Broker quoted/Market Comparable \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in unconsolidated affiliate	8.4	8.7
Investment in unconsolidated affiliates \| Maximum \| Broker quoted/Market Comparable \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in unconsolidated affiliate	12.4	23.6
Investment in unconsolidated affiliates \| Weighted Average \| Broker quoted/Market Comparable \| EBITDA Multiple
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Investment in unconsolidated affiliate	9.8	14.6
Available-for-sale embedded derivative \| Black Scholes model
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 36	$ 32
Available-for-sale embedded derivative \| Black Scholes model \| Market Value of AnchorPath Fund
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative asset	1.0000	1.0000
Loan receivable \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 18	$ 11
Loan receivable \| Minimum \| Discounted Cash Flow \| Risk-Adjusted Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.0681	0.0722
Loan receivable \| Minimum \| Discounted Cash Flow \| Collateral Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.3500	0.3500
Loan receivable \| Maximum \| Discounted Cash Flow \| Risk-Adjusted Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.0681	0.0722
Loan receivable \| Maximum \| Discounted Cash Flow \| Collateral Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.3500	0.3500
Loan receivable \| Weighted Average \| Discounted Cash Flow \| Risk-Adjusted Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.0681	0.0722
Loan receivable \| Weighted Average \| Discounted Cash Flow \| Collateral Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loan receivable, measurement input	0.3500	0.3500
Other assets \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 140	$ 65
Other assets \| Minimum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets	0.0766	0.1060
Other assets \| Minimum \| Discounted Cash Flow \| Conditional Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets	0.0595	0.0624
Other assets \| Maximum \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets	0.1252	0.1200
Other assets \| Maximum \| Discounted Cash Flow \| Conditional Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets	0.1385	0.1199
Other assets \| Weighted Average \| Discounted Cash Flow \| Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets	0.0935	0.1130
Other assets \| Weighted Average \| Discounted Cash Flow \| Conditional Prepayment Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets	0.0819	0.0912
Market risk benefits asset \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Assets, fair value	$ 213	$ 189
Market risk benefits asset \| Minimum \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.8000	0.8000
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	0.0000	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	0.0048	0.0048
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 \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.1500	1.1500
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.3000	0.3000
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.2439	0.2439
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0095	0.0095
Market risk benefits asset \| Maximum \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.7500	0.7500
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 \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0501	0.0505
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0248	0.0248
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0075	0.0075
Market risk benefits asset \| Weighted Average \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.6237	0.6177
Contingent consideration \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities, fair value	$ 67	$ 74
Contingent consideration \| Minimum \| Discounted Cash Flow \| Risk-Adjusted Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.1250	0.1350
Contingent consideration \| Minimum \| Discounted Cash Flow \| EBITDA Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.3500	0.3500
Contingent consideration \| Minimum \| Discounted Cash Flow \| Counterparty Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.0600	0.0650
Contingent consideration \| Maximum \| Discounted Cash Flow \| Risk-Adjusted Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.1250	0.1350
Contingent consideration \| Maximum \| Discounted Cash Flow \| EBITDA Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.3500	0.3500
Contingent consideration \| Maximum \| Discounted Cash Flow \| Counterparty Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.0600	0.0650
Contingent consideration \| Weighted Average \| Discounted Cash Flow \| Risk-Adjusted Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.1250	0.1350
Contingent consideration \| Weighted Average \| Discounted Cash Flow \| EBITDA Volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.3500	0.3500
Contingent consideration \| Weighted Average \| Discounted Cash Flow \| Counterparty Discount Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent consideration	0.0600	0.0650
Market risk benefits liability \| Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities, fair value	$ 711	$ 549
Market risk benefits liability \| Minimum \| Discounted Cash Flow \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.8000	0.8000
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	0.0000	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	0.0048	0.0048
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 \| Mortality
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	1.1500	1.1500
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.3000	0.3000
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.2439	0.2439
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0095	0.0095
Market risk benefits liability \| Maximum \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.7500	0.7500
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 \| Surrender Rates
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0501	0.0505
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| Partial Withdrawals
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0248	0.0248
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| Non-Performance Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.0075	0.0075
Market risk benefits liability \| Weighted Average \| Discounted Cash Flow \| GMWB Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Market risk benefit	0.6237	0.6177

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