FAIR VALUE MEASUREMENTS - Investments Held in Trusts (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Short-term cash investments	$ 5	$ 5
Debt securities
Debt Securities, Available-for-sale [Line Items]
Cost Basis	298	294
Unrealized Gains	0	0
Unrealized Losses	(29)	(28)
Fair Value	$ 269	$ 266

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details