Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Details) $ in Millions		Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale	[1]	$ 219,767	$ 277,202
Embedded derivatives within Policyholder contract deposits		6,400	14,500
Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives within Policyholder contract deposits		920	1,200
Obligations of states, municipalities and political subdivisions
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 11,891	$ 14,527
Obligations of states, municipalities and political subdivisions | Minimum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0508	0.0274
Obligations of states, municipalities and political subdivisions | Maximum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0607	0.0333
Obligations of states, municipalities and political subdivisions | Weighted-average | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0557	0.0306
Obligations of states, municipalities and political subdivisions | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 815	$ 1,400
Corporate debt
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 133,336	$ 175,608
Corporate debt | Minimum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0342	0.0223
Corporate debt | Maximum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.1451	0.0769
Corporate debt | Weighted-average | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0792	0.0496
Corporate debt | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 2,059	$ 1,561
RMBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 18,507	$ 27,287
RMBS | Minimum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0558	0.0169
RMBS | Minimum | Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0478	0.0525
RMBS | Minimum | Loss severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.4465	0.2613
RMBS | Minimum | Constant default rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0087	0.0115
RMBS | Maximum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0722	0.0397
RMBS | Maximum | Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.1005	0.1770
RMBS | Maximum | Loss severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.7604	0.7193
RMBS | Maximum | Constant default rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0279	0.0585
RMBS | Weighted-average | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0640	0.0283
RMBS | Weighted-average | Constant prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0742	0.1147
RMBS | Weighted-average | Loss severity
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.6035	0.4903
RMBS | Weighted-average | Constant default rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0183	0.0350
RMBS | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 5,530	$ 9,916
CDO/ABS | Minimum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0572	0.0184
CDO/ABS | Maximum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0799	0.0477
CDO/ABS | Weighted-average | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0685	0.0331
CDO/ABS | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 8,802	$ 8,229
CMBS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 13,931	$ 15,809
CMBS | Minimum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0516	0.0150
CMBS | Maximum | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0947	0.0501
CMBS | Weighted-average | Yield
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Derivative asset, measurement input		0.0731	0.0325
CMBS | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Bonds available for sale		$ 553	$ 580
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | Equity volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0605	0.0595
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | Base lapse rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0016	0.0016
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | Dynamic lapse multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.2000	0.2000
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | Mortality multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.3800	0.3800
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.9000	0.9000
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | Equity / interest rate correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.1000	0.2000
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Minimum | NPA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0013	0.0001
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | Equity volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.4805	0.4665
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | Base lapse rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.1260	0.1260
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | Dynamic lapse multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		1.8600	1.8600
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | Mortality multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		1.4700	1.4700
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		1.0000	1.0000
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | Equity / interest rate correlation
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.3000	0.4000
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Maximum | NPA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0229	0.0140
Variable annuity guaranteed minimum withdrawal benefits (GMWB) | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives within Policyholder contract deposits		$ 698	$ 2,472
Fixed Index annuities including certain GMWB | Minimum | Equity volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0605	0.0595
Fixed Index annuities including certain GMWB | Minimum | Base lapse rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0050	0.0050
Fixed Index annuities including certain GMWB | Minimum | Dynamic lapse multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.2000	0.2000
Fixed Index annuities including certain GMWB | Minimum | Mortality multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.2400	0.2400
Fixed Index annuities including certain GMWB | Minimum | Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.6000	0.6000
Fixed Index annuities including certain GMWB | Minimum | NPA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0013	0.0001
Fixed Index annuities including certain GMWB | Minimum | Option budget
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0000	0.0000
Fixed Index annuities including certain GMWB | Maximum | Equity volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.4805	0.4665
Fixed Index annuities including certain GMWB | Maximum | Base lapse rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.5000	0.5000
Fixed Index annuities including certain GMWB | Maximum | Dynamic lapse multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		1.8600	1.8600
Fixed Index annuities including certain GMWB | Maximum | Mortality multiplier
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		1.8000	1.8000
Fixed Index annuities including certain GMWB | Maximum | Utilization
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.9500	0.9500
Fixed Index annuities including certain GMWB | Maximum | NPA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0229	0.0140
Fixed Index annuities including certain GMWB | Maximum | Option budget
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0500	0.0400
Fixed Index annuities including certain GMWB | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives within Policyholder contract deposits		$ 5,095	$ 6,445
Indexed life | Minimum | Equity volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0620	0.0765
Indexed life | Minimum | Base lapse rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0000	0.0000
Indexed life | Minimum | Mortality rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0000	0.0000
Indexed life | Minimum | NPA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0013	0.0001
Indexed life | Maximum | Equity volatility
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.2611	0.2070
Indexed life | Maximum | Base lapse rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.3797	0.3797
Indexed life | Maximum | Mortality rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		1.0000	1.0000
Indexed life | Maximum | NPA
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liability, measurement input		0.0229	0.0140
Indexed life | Level 3
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivatives within Policyholder contract deposits		$ 555	$ 765

[1] See Note 8 for details of balances associated with variable interest entities.