CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($)	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-In Capital	(Accumulated Deficit) Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interests	Sinclair Broadcast Group, LLC	Sinclair Broadcast Group, LLC Class A Common Stock	Sinclair Broadcast Group, LLC Class B Common Stock	Sinclair Broadcast Group, LLC Common Stock Class A Common Stock	Sinclair Broadcast Group, LLC Common Stock Class B Common Stock	Sinclair Broadcast Group, LLC Additional Paid-In Capital	Sinclair Broadcast Group, LLC (Accumulated Deficit) Retained Earnings	Sinclair Broadcast Group, LLC Accumulated Other Comprehensive (Loss) Income	Sinclair Broadcast Group, LLC Noncontrolling Interests
Beginning balance at Dec. 31, 2020	$ 190,000,000									$ 190,000,000
Redeemable Noncontrolling Interests
Distributions to noncontrolling interests, net	(11,000,000)									(11,000,000)
Net (loss) income	18,000,000									18,000,000
Ending balance at Dec. 31, 2021	197,000,000									197,000,000
Beginning balance (in shares) at Dec. 31, 2020				49,252,671	24,727,682								49,252,671	24,727,682
Beginning balance at Dec. 31, 2020	(1,185,000,000)			$ 1,000,000	$ 0	$ 721,000,000	$ (1,986,000,000)	$ (10,000,000)	$ 89,000,000	(1,185,000,000)			$ 1,000,000	$ 0	$ 721,000,000	$ (1,986,000,000)	$ (10,000,000)	$ 89,000,000
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(60,000,000)						(60,000,000)			(60,000,000)						(60,000,000)
Repurchase of Class A Common Stock (in shares)				(2,438,585)									(2,438,585)
Repurchases of Class A Common Stock	(61,000,000)					(61,000,000)				(61,000,000)					(61,000,000)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,547,591									1,547,591
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	31,000,000					31,000,000				31,000,000					31,000,000
Old Sinclair Class A And Class B Common Stock converted to SBG member's equity (in shares)				952,626	(952,626)								952,626	(952,626)
Distributions to noncontrolling interests, net	(95,000,000)								(95,000,000)	(95,000,000)								(95,000,000)
Other comprehensive income (loss)	8,000,000							8,000,000		8,000,000							8,000,000
Net (loss) income	(344,000,000)						(414,000,000)		70,000,000	(344,000,000)						(414,000,000)		70,000,000
Ending balance (in shares) at Dec. 31, 2021				49,314,303	23,775,056								49,314,303	23,775,056
Ending balance at Dec. 31, 2021	(1,706,000,000)			$ 1,000,000	$ 0	691,000,000	(2,460,000,000)	(2,000,000)	64,000,000	(1,706,000,000)			$ 1,000,000	$ 0	691,000,000	(2,460,000,000)	(2,000,000)	64,000,000
Redeemable Noncontrolling Interests
Distributions to noncontrolling interests, net	(7,000,000)									(7,000,000)
Deconsolidation of subsidiary	(16,000,000)									(16,000,000)
Net (loss) income	20,000,000									20,000,000
Ending balance at Dec. 31, 2022	194,000,000									194,000,000
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(70,000,000)						(70,000,000)			(70,000,000)						(70,000,000)
Repurchase of Class A Common Stock (in shares)				(4,850,398)									(4,850,398)
Repurchases of Class A Common Stock	(120,000,000)					(120,000,000)				(120,000,000)					(120,000,000)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,383,974									1,383,974
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	53,000,000					53,000,000				53,000,000					53,000,000
Distributions to noncontrolling interests, net	(12,000,000)								(12,000,000)	(12,000,000)								(12,000,000)
Other comprehensive income (loss)	6,000,000							6,000,000		6,000,000							6,000,000
Deconsolidation of subsidiary	(151,000,000)							(3,000,000)	(148,000,000)	(151,000,000)							(3,000,000)	(148,000,000)
Net (loss) income	2,681,000,000						2,652,000,000		29,000,000	2,681,000,000						2,652,000,000		29,000,000
Ending balance (in shares) at Dec. 31, 2022		45,847,879	23,775,056	45,847,879	23,775,056						45,847,879	23,775,056	45,847,879	23,775,056
Ending balance at Dec. 31, 2022	681,000,000			$ 1,000,000	$ 0	624,000,000	122,000,000	1,000,000	(67,000,000)	681,000,000			$ 1,000,000	$ 0	624,000,000	122,000,000	1,000,000	(67,000,000)
Redeemable Noncontrolling Interests
Repurchase of redeemable subsidiary preferred equity										(190,000,000)
Net (loss) income	(4,000,000)									(4,000,000)
Ending balance at Dec. 31, 2023	0									0
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Class A and Class B Common Stock	(65,000,000)						(65,000,000)			(18,000,000)						(18,000,000)
Repurchase of Class A Common Stock (in shares)				(8,785,022)									(8,785,022)
Repurchases of Class A Common Stock	(153,000,000)					(153,000,000)				(153,000,000)					(153,000,000)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				2,674,825									2,274,558
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	46,000,000					46,000,000				40,000,000					40,000,000
Old Sinclair Class A And Class B Common Stock converted to SBG member's equity (in shares)													(39,337,415)
Old Sinclair Class A And Class B Common Stock converted to SBG member's equity										(1,000,000)			$ (1,000,000)	$ (23,775,056)
Deemed dividend to parent										(1,147,000,000)					(511,000,000)	(635,000,000)		(1,000,000)
Distribution to parent										(77,000,000)						(77,000,000)
Distributions to noncontrolling interests, net	(13,000,000)								(13,000,000)	(12,000,000)								(12,000,000)
Net (loss) income	(275,000,000)						(291,000,000)		16,000,000	(241,000,000)						(257,000,000)		16,000,000
Ending balance (in shares) at Dec. 31, 2023		39,737,682	23,775,056	39,737,682	23,775,056								0	0
Ending balance at Dec. 31, 2023	$ 221,000,000			$ 1,000,000	$ 0	$ 517,000,000	$ (234,000,000)	$ 1,000,000	$ (64,000,000)	$ (928,000,000)			$ 0	$ 0	$ 0	$ (865,000,000)	$ 1,000,000	$ (64,000,000)