CONSOLIDATED STATEMENTS OF MEMBER'S EQUITY (DEFICIT) AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) $ in Millions	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	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive (Loss) Income	Noncontrolling Interests	Sinclair Broadcast Group, LLC	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 Retained Earnings (Accumulated Deficit)	Sinclair Broadcast Group, LLC Accumulated Other Comprehensive (Loss) Income	Sinclair Broadcast Group, LLC Noncontrolling Interests
Beginning balance at Dec. 31, 2022	$ 194									$ 194
Increase (Decrease) in Temporary Equity
Repurchase of redeemable subsidiary preferred equity	(190)									(190)
Net (loss) income	(4)									(4)
Ending balance at Jun. 30, 2023	0									0
Beginning balance (in shares) at Dec. 31, 2022				45,847,879	23,775,056						45,847,879	23,775,056
Beginning balance at Dec. 31, 2022	681			$ 1	$ 0	$ 624	$ 122	$ 1	$ (67)	681	$ 1	$ 0	$ 624	$ 122	$ 1	$ (67)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Old Sinclair Class A and Class B Common Stock	(34)						(34)			(18)				(18)
Repurchases of Old Sinclair Class A Common Stock (in shares)				(8,785,022)							(8,785,022)
Repurchases of Old Sinclair Class A Common Stock	(153)					(153)				(153)			(153)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				2,211,986							2,274,558
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	39					39				40			40
Old Sinclair Class A and Class B Common Stock converted to SBG member's equity (in shares)											(39,337,415)	(23,775,056)
Old Sinclair Class A Common Stock converted to SBG member's equity										(1)	$ 1
Deemed dividend to parent										(1,118)			(511)	(606)		(1)
Distributions to noncontrolling interests	(8)								(8)	(7)						(7)
Other comprehensive income	6							6		6					6
Net (loss) income	110						96		14	98				84		14
Ending balance (in shares) at Jun. 30, 2023				39,274,843	23,775,056						0	0
Ending balance at Jun. 30, 2023	641			$ 1	$ 0	510	184	7	(61)	(472)	$ 0	$ 0	0	(418)	7	(61)
Increase (Decrease) in Temporary Equity
Net (loss) income	0									0
Ending balance at Jun. 30, 2023	0									0
Beginning balance (in shares) at Mar. 31, 2023				44,360,502	23,775,056						44,360,502	23,775,056
Beginning balance at Mar. 31, 2023	831			$ 1	$ 0	602	289	(2)	(59)	831	$ 1	$ 0	602	289	(2)	(59)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Old Sinclair Class A and Class B Common Stock	(16)						(16)
Repurchases of Old Sinclair Class A Common Stock (in shares)				(5,201,809)							(5,201,809)
Repurchases of Old Sinclair Class A Common Stock	(100)					(100)				(100)			(100)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				116,150							178,722
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	8					8				9			9
Old Sinclair Class A and Class B Common Stock converted to SBG member's equity (in shares)											(39,337,415)	(23,775,056)
Old Sinclair Class A Common Stock converted to SBG member's equity										(1)	$ (1)
Deemed dividend to parent										(1,118)			(511)	(606)		(1)
Distributions to noncontrolling interests	(4)								(4)	(3)						(3)
Other comprehensive income	9							9		9					9
Net (loss) income	(87)						(89)		2	(99)				(101)		2
Ending balance (in shares) at Jun. 30, 2023				39,274,843	23,775,056						0	0
Ending balance at Jun. 30, 2023	641			$ 1	$ 0	510	184	7	(61)	(472)	$ 0	$ 0	$ 0	(418)	7	(61)
Increase (Decrease) in Temporary Equity
Net (loss) income	0									0
Beginning balance (in shares) at Dec. 31, 2023		39,737,682	23,775,056	39,737,682	23,775,056
Beginning balance at Dec. 31, 2023	221			$ 1	$ 0	517	(234)	1	(64)	(928)				(865)	1	(64)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Old Sinclair Class A and Class B Common Stock	(33)						(33)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				2,768,089
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	43					43
Contributions from member, net										144				144
Distributions to noncontrolling interests	(5)								(5)	(5)						(5)
Other comprehensive income	5							5		5					5
Net (loss) income	44						40		4	10				7		3
Ending balance (in shares) at Jun. 30, 2024		42,505,771	23,775,056	42,505,771	23,775,056
Ending balance at Jun. 30, 2024	275			$ 1	$ 0	560	(227)	6	(65)	(774)				(714)	6	(66)
Increase (Decrease) in Temporary Equity
Net (loss) income	0									0
Beginning balance (in shares) at Mar. 31, 2024				42,305,323	23,775,056
Beginning balance at Mar. 31, 2024	269			$ 1	$ 0	554	(227)	5	(64)	(855)				(795)	5	(65)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Old Sinclair Class A and Class B Common Stock	(17)						(17)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				200,448
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	6					6
Contributions from member, net										79				79
Distributions to noncontrolling interests	(3)								(3)	(3)						(3)
Other comprehensive income	1							1		1					1
Net (loss) income	19						17		2	4				2		2
Ending balance (in shares) at Jun. 30, 2024		42,505,771	23,775,056	42,505,771	23,775,056
Ending balance at Jun. 30, 2024	$ 275			$ 1	$ 0	$ 560	$ (227)	$ 6	$ (65)	$ (774)				$ (714)	$ 6	$ (66)