INVESTMENTS AND FAIR VALUE MEASUREMENT - Schedule of Held-to-Maturity Investments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	$ 53	$ 398
Allowance for Credit Losses	0	0
Unrealized Gains	0	1
Unrealized Losses	0	0
Fair Value	53	399
U.S. Treasury securities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	53	337
Allowance for Credit Losses	0	0
Unrealized Gains	0	1
Unrealized Losses	0	0
Fair Value	$ 53	338
Corporate debt securities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost		51
Allowance for Credit Losses		0
Unrealized Gains		0
Unrealized Losses		0
Fair Value		51
U.S. government agency securities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost		10
Allowance for Credit Losses		0
Unrealized Gains		0
Unrealized Losses		0
Fair Value		$ 10