v3.23.1
Market Risk Benefits - Balances and changes in market risk benefits (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2020
Market Risk Benefit [Line Items]        
Market risk benefit $ 4,034 $ 7,034 $ 8,401 $ 8,563
Market risk benefit in an asset position       176
Reinsured market risk benefit       162
Market risk benefit assets, at fair value 796 610 338 338
Market risk benefit liabilities, at fair value 4,736 7,499 8,739  
As Previously Reported        
Market Risk Benefit [Line Items]        
Market risk benefit       0
Market risk benefit assets, at fair value 0 0 0  
Market risk benefit liabilities, at fair value 0 0 0  
Effect Of Application Of Accounting Standards Update 2018-12, Reclassification Of Embedded Derivative Liability From Policyholder Contract Deposits        
Market Risk Benefit [Line Items]        
Market risk benefit       6,471
Effect Of Application Of Accounting Standards Update 2018-12, Reclassification Of Future Policy Benefits        
Market Risk Benefit [Line Items]        
Market risk benefit       1,575
Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Effect Of Changes In Instrument-Specific Credit Risk        
Market Risk Benefit [Line Items]        
Market risk benefit       2,327
Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For The Removal Of Shadow Adjustments        
Market Risk Benefit [Line Items]        
Market risk benefit       (605)
Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For Remaining Difference Between Carrying Amount And Fair Value For MRB        
Market Risk Benefit [Line Items]        
Market risk benefit       (1,367)
Individual Retirement        
Market Risk Benefit [Line Items]        
Market risk benefit 3,738 6,452 7,599 7,761
Market risk benefit in an asset position       176
Reinsured market risk benefit       162
Market risk benefit liabilities, at fair value       7,937
Individual Retirement | As Previously Reported        
Market Risk Benefit [Line Items]        
Market risk benefit       0
Individual Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Reclassification Of Embedded Derivative Liability From Policyholder Contract Deposits        
Market Risk Benefit [Line Items]        
Market risk benefit       5,894
Individual Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Reclassification Of Future Policy Benefits        
Market Risk Benefit [Line Items]        
Market risk benefit       1,356
Individual Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Effect Of Changes In Instrument-Specific Credit Risk        
Market Risk Benefit [Line Items]        
Market risk benefit       2,140
Individual Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For The Removal Of Shadow Adjustments        
Market Risk Benefit [Line Items]        
Market risk benefit       (516)
Individual Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For Remaining Difference Between Carrying Amount And Fair Value For MRB        
Market Risk Benefit [Line Items]        
Market risk benefit       (1,275)
Group Retirement        
Market Risk Benefit [Line Items]        
Market risk benefit $ 296 $ 582 $ 802 802
Market risk benefit in an asset position       0
Reinsured market risk benefit       0
Market risk benefit assets, at fair value       0
Market risk benefit liabilities, at fair value       802
Group Retirement | As Previously Reported        
Market Risk Benefit [Line Items]        
Market risk benefit       0
Group Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Reclassification Of Embedded Derivative Liability From Policyholder Contract Deposits        
Market Risk Benefit [Line Items]        
Market risk benefit       577
Group Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Reclassification Of Future Policy Benefits        
Market Risk Benefit [Line Items]        
Market risk benefit       219
Group Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Effect Of Changes In Instrument-Specific Credit Risk        
Market Risk Benefit [Line Items]        
Market risk benefit       187
Group Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For The Removal Of Shadow Adjustments        
Market Risk Benefit [Line Items]        
Market risk benefit       (89)
Group Retirement | Effect Of Application Of Accounting Standards Update 2018-12, Adjustments For Remaining Difference Between Carrying Amount And Fair Value For MRB        
Market Risk Benefit [Line Items]        
Market risk benefit       $ (92)