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DEBT AND EQUITY SECURITIES - Schedule of Net Unrealized Gains (Losses) Recognized (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Convertible Debt Securities        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis        
Other comprehensive income (loss) (Note 14) $ 0 $ 2 $ (12) $ 3