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INVESTMENTS - Net Investment Income (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Net Investment Income [Line Items]      
Gross investment income (loss) $ 5,025 $ 4,428 $ 3,420
Investment expenses (129) (108) (105)
Net investment income (loss) 4,896 4,320 3,315
Fixed maturities      
Net Investment Income [Line Items]      
Gross investment income (loss) 3,484 3,107 2,625
Mortgage loans on real estate      
Net Investment Income [Line Items]      
Gross investment income (loss) 973 806 587
Other equity investments      
Net Investment Income [Line Items]      
Gross investment income (loss) 138 77 134
Policy loans      
Net Investment Income [Line Items]      
Gross investment income (loss) 225 216 215
Trading securities      
Net Investment Income [Line Items]      
Gross investment income (loss) 159 110 (169)
Other investment income      
Net Investment Income [Line Items]      
Gross investment income (loss) 13 98 33
Fixed maturities, at fair value using the fair value option      
Net Investment Income [Line Items]      
Gross investment income (loss) $ 33 $ 14 $ (5)