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INVESTMENTS - Equity Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Equity Securities, FV-NI [Line Items]    
Total equity securities $ 764 $ 796
Yen-denominated    
Equity Securities, FV-NI [Line Items]    
Total equity securities 491 484
Dollar-denominated    
Equity Securities, FV-NI [Line Items]    
Total equity securities $ 273 $ 312