v3.25.4
SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jan. 31, 2026
Feb. 28, 2025
Feb. 29, 2024
Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]                      
Preferred stock, authorized shares (in shares) 4,400,000       4,400,000 4,400,000          
Preferred stock, liquidation preference per depositary share (in dollars per share)         $ 25            
Depositary share, preferred stock ownership interest         0.025%            
Preferred stock redemption $ 6 $ 0 $ 0 $ 0 $ 0 $ 6 $ 0        
Shares outstanding (in shares)         147,700,000            
Common stock, par value (in dollars per share) $ 0.001       $ 0.001 $ 0.001          
Common stock and additional paid-in capital         $ 1,700            
Common stock and additional paid-in capital increase         $ 11            
Common stock and additional paid-in capital decrease (as a percent)         1.00%            
Share repurchase program, authorized, amount                 $ 40 $ 35  
AOCI loss $ 6,124       $ 7,180 $ 6,124 5,691       $ 4,893
Unrealized loss unamortized over the life of security 1,800       1,600 1,800          
Other comprehensive income, net of tax         439 312 420        
Common stock held in trust 19       24 19          
Total invested assets of trusts 149       154 149          
Total obligations of trusts 168       $ 178 168          
Subsequent Event                      
Schedule of Equity Method Investments [Line Items]                      
Share repurchase program, authorized, amount               $ 75      
Series A                      
Schedule of Equity Method Investments [Line Items]                      
Preferred stock, authorized shares (in shares)         140,000,000            
Liquidation preference of preferred stock (per share)         $ 1,000            
Preferred stock, outstanding (in shares)         66,139            
Accumulated other comprehensive income (loss)                      
Schedule of Equity Method Investments [Line Items]                      
AOCI loss $ (2,380)       $ (1,941) (2,380) (2,692)       $ (3,112)
Other comprehensive income, net of tax         $ 439 $ 312 $ 420