FAIR VALUE MEASUREMENTS - Schedule of Level 3 Activity (Details) - Level 3 - Face Value - Options and Warrants - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at beginning of period	$ 75	$ 226	$ 75	$ 282
Measurement adjustments	(17)	(74)	(17)	(130)
Fair value at end of period	$ 58	$ 152	$ 58	$ 152

Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Measurement Adjustments

No definition available.

Name:	sbgi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityMeasurementAdjustments
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration