DEBT AND EQUITY SECURITIES - Schedule of Convertible Debt Security (Details) - Convertible Debt Securities - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Amortized cost	$ 30	$ 30	$ 30
Allowance for credit losses	(30)	(30)	0
Gross unrealized gains		12	12
Gross unrealized losses		(12)	0
Fair value	0	0	$ 42
Allowance for credit loss, expense	$ 25	$ 30

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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