NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 3,134	$ 3,928	$ 6,134
Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue	1,680	2,143	4,288
Advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	1,285	1,614	1,691
Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue	169	171	155
Operating segments | Local media
Disaggregation of Revenue [Line Items]
Revenue	2,866	3,193	2,887
Operating segments | Local sports
Disaggregation of Revenue [Line Items]
Revenue		482	3,056
Operating segments | Other
Disaggregation of Revenue [Line Items]
Revenue	62	95	128
Operating segments | Distribution revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,491	1,531	1,476
Operating segments | Distribution revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue		433	2,620
Operating segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Operating segments | Advertising revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,236	1,518	1,230
Operating segments | Advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue		44	409
Operating segments | Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	25	41	64
Operating segments | Other media, non-media, and intercompany revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	139	144	181
Operating segments | Other media, non-media, and intercompany revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue		5	27
Operating segments | Other media, non-media, and intercompany revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	37	54	64
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(22)	(59)	(161)
Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Eliminations | Advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	(13)	(22)	(41)
Eliminations | Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue	(9)	(37)	(120)
Sinclair Broadcast Group, LLC
Disaggregation of Revenue [Line Items]
Revenue	2,978	3,928	6,134
Sinclair Broadcast Group, LLC | Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue	1,567	2,143	4,288
Sinclair Broadcast Group, LLC | Advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	1,260	1,614	1,691
Sinclair Broadcast Group, LLC | Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue	151	171	155
Sinclair Broadcast Group, LLC | Operating segments | Local media
Disaggregation of Revenue [Line Items]
Revenue	2,866	3,193	2,887
Sinclair Broadcast Group, LLC | Operating segments | Local sports
Disaggregation of Revenue [Line Items]
Revenue		482	3,056
Sinclair Broadcast Group, LLC | Operating segments | Other
Disaggregation of Revenue [Line Items]
Revenue	119	312	352
Sinclair Broadcast Group, LLC | Operating segments | Distribution revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,491	1,531	1,476
Sinclair Broadcast Group, LLC | Operating segments | Distribution revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue		433	2,620
Sinclair Broadcast Group, LLC | Operating segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	76	179	192
Sinclair Broadcast Group, LLC | Operating segments | Advertising revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,236	1,518	1,230
Sinclair Broadcast Group, LLC | Operating segments | Advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue		44	409
Sinclair Broadcast Group, LLC | Operating segments | Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	29	74	93
Sinclair Broadcast Group, LLC | Operating segments | Other media, non-media, and intercompany revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	139	144	181
Sinclair Broadcast Group, LLC | Operating segments | Other media, non-media, and intercompany revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue		5	27
Sinclair Broadcast Group, LLC | Operating segments | Other media, non-media, and intercompany revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	14	59	67
Sinclair Broadcast Group, LLC | Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(7)	(59)	(161)
Sinclair Broadcast Group, LLC | Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Sinclair Broadcast Group, LLC | Eliminations | Advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	(5)	(22)	(41)
Sinclair Broadcast Group, LLC | Eliminations | Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue	$ (2)	$ (37)	$ (120)