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SIGNIFICANT ACCOUNTING POLICIES - Schedule of Market Risk Benefit, Activity (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2019
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk $ 668 $ (912)   $ 23,784
As Previously Reported        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       19,525
Effect Of Application Of Accounting Standards Updated 2018-12, Adjustments For Reversal Of Balances Recorded In Accumulated Other Comprehensive Income        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       (74)
Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Effect Of Changes In Instrument-Specific Credit Risk        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       968
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]        
Changes in the instrument-specific credit risk       3,365
Protection Solutions | No Effect Of Application Of Accounting Standards Update 2018-12        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk     $ (2)  
GMxB Core | Individual Retirement        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk $ 1 $ 395   2,144
GMxB Core | Individual Retirement | As Previously Reported        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       2,206
GMxB Core | Individual Retirement | Effect Of Application Of Accounting Standards Updated 2018-12, Adjustments For Reversal Of Balances Recorded In Accumulated Other Comprehensive Income        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       (4)
GMxB Core | 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]        
Changes in the instrument-specific credit risk       505
GMxB Core | 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]        
Changes in the instrument-specific credit risk       (563)
GMxB Legacy | Legacy Segment        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       24,404
GMxB Legacy | Legacy Segment | As Previously Reported        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       19,891
GMxB Legacy | Legacy Segment | Effect Of Application Of Accounting Standards Updated 2018-12, Adjustments For Reversal Of Balances Recorded In Accumulated Other Comprehensive Income        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       (70)
GMxB Legacy | Legacy Segment | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Effect Of Changes In Instrument-Specific Credit Risk        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       461
GMxB Legacy | Legacy Segment | 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]        
Changes in the instrument-specific credit risk       4,122
Purchased MRB | Legacy Segment        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       (2,764)
Purchased MRB | Legacy Segment | As Previously Reported        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       (2,572)
Purchased MRB | Legacy Segment | Effect Of Application Of Accounting Standards Updated 2018-12, Adjustments For Reversal Of Balances Recorded In Accumulated Other Comprehensive Income        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       0
Purchased MRB | Legacy Segment | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Effect Of Changes In Instrument-Specific Credit Risk        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk       2
Purchased MRB | Legacy Segment | 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]        
Changes in the instrument-specific credit risk       $ (194)
EI | No Effect Of Application Of Accounting Standards Update 2018-12        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk     43  
SCS | No Effect Of Application Of Accounting Standards Update 2018-12        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk     21  
Group Retirement Equi-Vest | No Effect Of Application Of Accounting Standards Update 2018-12        
Market Risk Benefit [Line Items]        
Changes in the instrument-specific credit risk     $ (20)