v3.26.1
SALE OF RENEWAL RIGHTS (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Oct. 26, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Total net realized gains (losses) from dispositions   $ 1 $ 0 $ (12) $ (2)  
Other liabilities   772   772   $ 653
American International Group, Inc.            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Severance costs   $ 15   $ 20   22
Legal expenses and merger acquisition fees           9
American International Group, Inc. | Software, In-Development, Internally Developed, and Purchased            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Impairments of capitalized software           61
American International Group, Inc. | Everest Group, Ltd.            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Purchase price adjusted (as a percent) 15.00%          
Additional monthly consideration $ 10          
American International Group, Inc. | Everest Reinsurance Holdings, Inc            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Additional monthly consideration $ 7          
American International Group, Inc. | United States, United Kingdom, And Asia Pacific            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Aggregate renewed premiums (as a percent) 80.00%          
Aggregate purchase price, not to exceed $ 70          
Other liabilities           47
American International Group, Inc. | United States, United Kingdom, And Asia Pacific | Everest Group, Ltd.            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Aggregate purchase price 252          
Total net realized gains (losses) from dispositions           204
Other liabilities           47
American International Group, Inc. | United States, United Kingdom, And Asia Pacific | Everest Reinsurance Holdings, Inc            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Aggregate purchase price $ 170          
Total net realized gains (losses) from dispositions           32
Other liabilities           $ 38