EARNINGS PER SHARE - Schedule of Earnings per Share (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income (Numerator)
Net (loss) income	$ (87)	$ (6)	$ 106	$ 2,610
Net (income) loss attributable to the redeemable noncontrolling interests	0	(5)	4	(9)
Net income attributable to the noncontrolling interests	(2)	0	(14)	(25)
Net (loss) income attributable to Sinclair Broadcast Group	(89)	(11)	96	2,576
Numerator for diluted earnings per common share available to common shareholders	$ (89)	$ (11)	$ 96	$ 2,576
Shares (Denominator)
Basic weighted-average common shares outstanding (in shares)	64,012	70,897	66,862	71,527
Dilutive effect of stock-settled appreciation rights and outstanding stock options (in shares)	0	0	85	6
Diluted weighted-average common and common equivalent shares outstanding (in shares)	64,012	70,897	66,947	71,533
Antidilutive Securities Excluded from Computation
Weighted-average stock-settled appreciation rights and outstanding stock options excluded (in shares)	3,693	3,645	3,645	3,095