QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Revenues, net	$ 960	$ 843	$ 837	$ 1,288	$ 1,476	$ 1,535	$ 1,612	$ 1,511	$ 3,928	$ 6,134	$ 5,943
Operating income (loss)	253	154	107	3,466	165	73	(178)	35	3,980	95	(2,772)
Net income (loss)	62	29	(6)	2,616	(41)	17	(328)	26
Net (loss) income attributable to Sinclair Broadcast Group	$ 55	$ 21	$ (11)	$ 2,587	$ (89)	$ 19	$ (332)	$ (12)	$ 2,652	$ (414)	$ (2,414)
Basic (loss) earnings per common share (in dollars per share)	$ 0.79	$ 0.32	$ (0.17)	$ 35.85	$ (1.18)	$ 0.25	$ (4.41)	$ (0.16)	$ 37.54	$ (5.51)	$ (30.20)
Diluted (loss) earnings per common share (in dollars per share)	$ 0.79	$ 0.32	$ (0.17)	$ 35.84	$ (1.18)	$ 0.25	$ (4.41)	$ (0.16)	$ 37.54	$ (5.51)	$ (30.20)