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FAIR VALUE MEASUREMENTS - Amortized Cost Basis, Unrealized Gains and Losses and Fair Values of Investments in Available-for-sale Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]    
Short-term cash investments $ 6 $ 6
Debt securities    
Debt Securities, Available-for-sale [Line Items]    
Cost Basis 303 301
Unrealized Gains 0 1
Unrealized Losses (29) (27)
Fair Value $ 274 $ 275