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ASU 2018-12 Transition IS (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Condensed Income Statements, Captions [Line Items]        
Insurance Commissions and Fees $ 606 $ 680 $ 2,435 $ 2,980
Net derivative gains (losses) (575) (54) (592) (3,983)
Total revenues 1,284 2,013 6,873 4,976
Policyholder Benefits and Claims Incurred, Net 687 675 2,193 2,746
Change in market risk benefits (194) 1,579 (4,104) (4,134)
Benefits, Losses and Expenses 1,937 10 2,141 2,967
Post-tax adjusted earnings $ (497) $ 1,587 3,884 1,648
Previously Reported        
Condensed Income Statements, Captions [Line Items]        
Insurance Commissions and Fees     3,141 3,636
Net derivative gains (losses)     304 (2,469)
Total revenues     8,473 7,142
Policyholder Benefits and Claims Incurred, Net     4,165 3,443
Change in market risk benefits     0 0
Benefits, Losses and Expenses     8,645 7,350
Post-tax adjusted earnings     10 (103)
Revision of Prior Period, Accounting Standards Update, Adjustment | Accounting Standards Update 2018-12        
Condensed Income Statements, Captions [Line Items]        
Insurance Commissions and Fees     (706) (656)
Net derivative gains (losses)     (896) (1,514)
Total revenues     (1,600) (2,166)
Policyholder Benefits and Claims Incurred, Net     (1,972) (697)
Change in market risk benefits     (4,104) (4,134)
Benefits, Losses and Expenses     (6,504) (4,383)
Post-tax adjusted earnings     $ 3,874 $ 1,751