CONSOLIDATED STATEMENTS OF 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 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 Retained Earnings (Accumulated Deficit)	Sinclair Broadcast Group, LLC Accumulated Other Comprehensive (Loss) Income	Sinclair Broadcast Group, LLC Noncontrolling Interests
Beginning balance at Dec. 31, 2021	$ 197									$ 197
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests	(3)									(3)
Deconsolidation of subsidiary	(16)									(16)
Net income (loss)	9									9
Ending balance at Jun. 30, 2022	187									187
Beginning balance (in shares) at Dec. 31, 2021				49,314,303	23,775,056								49,314,303	23,775,056
Beginning balance at Dec. 31, 2021	(1,706)			$ 1	$ 0	$ 691	$ (2,460)	$ (2)	$ 64	(1,706)			$ 1	$ 0	$ 691	$ (2,460)	$ (2)	$ 64
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Old Sinclair Class A and Class B Common Stock	(37)						(37)			(37)						(37)
Repurchases of Old Sinclair Class A Common Stock (in shares)				(4,058,319)									(4,058,319)
Repurchases of Old Sinclair Class A Common Stock	(104)					(104)				(104)					(104)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				1,214,562									1,214,562
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	41					41				41					41
Distributions to noncontrolling interests	(5)								(5)	(5)								(5)
Other comprehensive income	3							3		3							3
Deconsolidation of subsidiary	(151)							(3)	(148)	(151)							(3)	(148)
Net income (loss)	2,601						2,576		25	2,601						2,576		25
Ending balance (in shares) at Jun. 30, 2022				46,470,546	23,775,056								46,470,546	23,775,056
Ending balance at Jun. 30, 2022	642			$ 1	$ 0	628	79	(2)	(64)	642			$ 1	$ 0	628	79	(2)	(64)
Beginning balance at Mar. 31, 2022	184									184
Increase (Decrease) in Temporary Equity
Distributions to noncontrolling interests	(2)									(2)
Net income (loss)	5									5
Ending balance at Jun. 30, 2022	187									187
Beginning balance (in shares) at Mar. 31, 2022				47,934,815	23,775,056								47,934,815	23,775,056
Beginning balance at Mar. 31, 2022	703			$ 1	$ 0	657	109	(2)	(62)	703			$ 1	$ 0	657	109	(2)	(62)
Increase (Decrease) in Stockholders' Equity
Dividends declared and paid on Old Sinclair Class A and Class B Common Stock	(19)						(19)			(19)						(19)
Repurchases of Old Sinclair Class A Common Stock (in shares)				(1,585,834)									(1,585,834)
Repurchases of Old Sinclair Class A Common Stock	(36)					(36)				(36)					(36)
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans (in shares)				121,565									121,565
Old Sinclair Class A Common Stock issued pursuant to employee benefit plans	7					7				7					7
Distributions to noncontrolling interests	(2)								(2)	(2)								(2)
Net income (loss)	(11)						(11)			(11)						(11)
Ending balance (in shares) at Jun. 30, 2022				46,470,546	23,775,056								46,470,546	23,775,056
Ending balance at Jun. 30, 2022	642			$ 1	$ 0	628	79	(2)	(64)	642			$ 1	$ 0	628	79	(2)	(64)
Beginning balance at Dec. 31, 2022	194									194
Increase (Decrease) in Temporary Equity
Repurchase of redeemable subsidiary preferred equity										(190)
Net income (loss)	(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						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 Member Equity (in shares)													(39,337,415)	(23,775,056)
Old Sinclair Class A and Class B 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 income (loss)	110						96		14	98						84		14
Ending balance (in shares) at Jun. 30, 2023		39,274,843	23,775,056	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)
Beginning balance at Mar. 31, 2023	0									0
Increase (Decrease) in Temporary Equity
Net income (loss)	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 Member Equity (in shares)													(39,337,415)	(23,775,056)
Old Sinclair Class A and Class B 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 income (loss)	(87)						(89)		2	(99)						(101)		2
Ending balance (in shares) at Jun. 30, 2023		39,274,843	23,775,056	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)