FAIR VALUE MEASUREMENTS - Schedule of Level 3 Activity (Details) - Options and Warrants - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021
Bally's
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Measurement adjustments	$ (51)	$ 52
Level 3 | Carrying Value
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning	435	332
Measurement adjustments	(51)	52
Fair value, ending	$ 384	$ 384