NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 3,548	$ 3,134	$ 3,928
Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue	1,746	1,680	2,143
Core advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	1,206	1,241	1,282
Political advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	405	44	332
Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue	191	169	171
Operating segments | Local media
Disaggregation of Revenue [Line Items]
Revenue	3,254	2,866	3,193
Operating segments | Local sports
Disaggregation of Revenue [Line Items]
Revenue			482
Operating segments | Other
Disaggregation of Revenue [Line Items]
Revenue	76	62	95
Operating segments | Distribution revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,543	1,491	1,531
Operating segments | Distribution revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			433
Operating segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Operating segments | Core advertising revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,152	1,192	1,186
Operating segments | Core advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			44
Operating segments | Core advertising revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	33	25	41
Operating segments | Political advertising revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	405	44	332
Operating segments | Political advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			0
Operating segments | Political advertising revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Operating segments | Other media, non-media, and intercompany revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	154	139	144
Operating segments | Other media, non-media, and intercompany revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			5
Operating segments | Other media, non-media, and intercompany revenue | Other
Disaggregation of Revenue [Line Items]
Revenue	43	37	54
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	(29)	(22)	(59)
Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Eliminations | Core advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	(18)	(13)	(22)
Eliminations | Political advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Eliminations | Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue	(11)	(9)	(37)
Sinclair Broadcast Group, LLC
Disaggregation of Revenue [Line Items]
Revenue	3,254	2,978	3,928
Sinclair Broadcast Group, LLC | Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue		1,567	2,143
Sinclair Broadcast Group, LLC | Core advertising revenue
Disaggregation of Revenue [Line Items]
Revenue		1,216	1,282
Sinclair Broadcast Group, LLC | Political advertising revenue
Disaggregation of Revenue [Line Items]
Revenue		44	332
Sinclair Broadcast Group, LLC | Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue		151	171
Sinclair Broadcast Group, LLC | Operating segments | Local media
Disaggregation of Revenue [Line Items]
Revenue	3,254	2,866	3,193
Sinclair Broadcast Group, LLC | Operating segments | Local sports
Disaggregation of Revenue [Line Items]
Revenue			482
Sinclair Broadcast Group, LLC | Operating segments | Other
Disaggregation of Revenue [Line Items]
Revenue		119	312
Sinclair Broadcast Group, LLC | Operating segments | Distribution revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,543	1,491	1,531
Sinclair Broadcast Group, LLC | Operating segments | Distribution revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			433
Sinclair Broadcast Group, LLC | Operating segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Revenue		76	179
Sinclair Broadcast Group, LLC | Operating segments | Core advertising revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	1,152	1,192	1,186
Sinclair Broadcast Group, LLC | Operating segments | Core advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			44
Sinclair Broadcast Group, LLC | Operating segments | Core advertising revenue | Other
Disaggregation of Revenue [Line Items]
Revenue		29	74
Sinclair Broadcast Group, LLC | Operating segments | Political advertising revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	405	44	332
Sinclair Broadcast Group, LLC | Operating segments | Political advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			0
Sinclair Broadcast Group, LLC | Operating segments | Political advertising revenue | Other
Disaggregation of Revenue [Line Items]
Revenue		0	0
Sinclair Broadcast Group, LLC | Operating segments | Other media, non-media, and intercompany revenue | Local media
Disaggregation of Revenue [Line Items]
Revenue	$ 154	139	144
Sinclair Broadcast Group, LLC | Operating segments | Other media, non-media, and intercompany revenue | Local sports
Disaggregation of Revenue [Line Items]
Revenue			5
Sinclair Broadcast Group, LLC | Operating segments | Other media, non-media, and intercompany revenue | Other
Disaggregation of Revenue [Line Items]
Revenue		14	59
Sinclair Broadcast Group, LLC | Eliminations
Disaggregation of Revenue [Line Items]
Revenue		(7)	(59)
Sinclair Broadcast Group, LLC | Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Revenue		0	0
Sinclair Broadcast Group, LLC | Eliminations | Core advertising revenue
Disaggregation of Revenue [Line Items]
Revenue		(5)	(22)
Sinclair Broadcast Group, LLC | Eliminations | Political advertising revenue
Disaggregation of Revenue [Line Items]
Revenue		0	0
Sinclair Broadcast Group, LLC | Eliminations | Other media, non-media, and intercompany revenue
Disaggregation of Revenue [Line Items]
Revenue		$ (2)	$ (37)