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Share-Based Compensation Plans - Narrative (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2022
USD ($)
shares
Sep. 14, 2022
$ / shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Share price (in USD per share)   $ 54.20
Number of shares authorized (in shares) | shares 40,000,000  
Conversion ratio 2.580952  
Restricted Stock Units (RSUs)    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Unrecognized compensation cost related to grants | $ $ 40  
Initial Public Offering    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Share price (in USD per share)   $ 21.00
Minimum | Restricted Stock Units (RSUs)    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Weighted average period (in years) 1 year  
Maximum | Restricted Stock Units (RSUs)    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Weighted average period (in years) 2 years 3 months  
AIG 2013 Long Term Incentive Plan | Awarded 2018 to 2020    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Performance period (in years) 3 years  
AIG 2013 Long Term Incentive Plan | Minimum | Awarded 2018 to 2020    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Percentage of performance period depending on which actual number of awards can be earned 0.00%  
AIG 2013 Long Term Incentive Plan | Maximum | Awarded 2018 to 2020    
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Percentage of performance period depending on which actual number of awards can be earned 200.00%